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352 views42 pagesRme Open Book 1
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dennis nationalCopyright
© © All Rights Reserved
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/ 42
OPEN BOOK —
EXAM
#1
70 QUESTIONS
TIME LIMIT -2 HOURS
TIME SPENT MINUTES
SCORE [ OB #1
MASTER OPEN BOOK EXAM #1
Two Hour Time Limit
1. For over 600v, the motor branch circuit conductors shall have an ampacity not less than __.
i (a) 175% of the motor nameplate current
(b) 180% of the motor nameplate current
\ (©) 140% of the full load current from the appropriate table in the NEC
(d) the current at which the motor overload device is selected to trip
2. The ampacity of a single #12 fixture wire is___amps.
(a) 20 (b) 25 ©23 (a) 35
3. Embedded deicing units shall not exceed __ watts per square foot of heating area,
(a) 120 (b) 15 (©) 16.5 (33
4. A 20 amp branch circuit is installed to supply receptacles for stage set lighting. The recep-
tacles connected to this circuit shall have a minimum rating of 22_ amperes.
(a) 15 (b}20 (c) 25 (@) 18 or 20
5. Resistors and reactors rated over 600v shall be isolated by __.
Lelevation Il, enclosure IIT. barrier tape :
(@)Tonly (b) only (c)& only (a) 1 & I only
6. Exposed snow melting heating elements shall be secured on the heated surface by a __ means.
(@) rigid (b) approved (¢) listed (d) stable
7.The minimum depth ofoil overthe powercontacts in an oil immersion type switch for usein aClass
1 Division II location is___ inches. >
ase ge gant
(a1 (b)112 ©2 @)3
8, Each storage or instantancous type water heater shall be‘equipped with a___ to disconnect all
ungrounded conductors and such means shall be installed to sense maximum water temperature and
iv beeither a trip free, manually reset type or have replaceable elements,
j
(a) thermostat (b) disconnect (¢) relay (q) temperature limiting means .
TH
719 pris ss
<¢ tocation shall be supplied by at ieast__ branch circuits, equally supplied by?
1¢ normal system.
paix (dD) eight
ent f aD motor, 7 1/25
S00v would be _ amps.
er speaker to a
ly terminated at
ng effect of pool
)) #10 copper unt
ated
on shall be __ to dispose of full load losses.
of the normal
rer the Loss.
f power for a hospital shatl be separate an
hove a capacity to s
F gle) 1/2 hours
fer is a device having a rotary transformer and ___ panel (s) that can
source.
mary ) regulator
poisecondary
ustible length shall be measured from the point of entrance to the park trailer
ec inlet (motor bese cat plug) to the face of the attachment plug,
wm length shall not excsed ___ fect.
00 we
36 U2
oy 1
so i OB iti
17, In an elevator machine room, at least '_ receptacle(s) shall be installed.
(a) one duplex (b) two duplex (c) one single (d) two receptacles, opposite walls
18, A capacitor's residual voltage shall be reduced to‘ volts or less within a 5 minute time period
after being disconnected from the source.
(a) 100 (b) 135 (©) 150 d) 50
19. A phase convertér disconnecting means shall be_.
(a) switch rated in hp (b) cireuit breaker
(©) molded case switch _(d) all of these
20. The electric vehicle supply equipment cable shall have an overall length not exceeding __
fee. pv we ogee
Boe ge eA se
(a) 12 (B) 25 (c) $0 (a) 100
21. In Class I locations
lust may dehydrate or carbonize making them even more dangerous.
(a) plastic (b) coal (© organic (d) metallic
22, In an office with relocatable partitions, individual partitions or groups of interconnected
individual partitions shall not contain more than’ _ 15 ampere, 125 volt receptacle outlets.
(a)9 (b) 10 (C) 13 (4) unlimited
23, An electric mixer intended for traveling in and out of an open mixing tank shall be considered
utilization equipment. 7
(@) fixed (b) stationary © portable (4) mobile
oy
24. Non-heating leads of snow melting equipment shall have a minimum length of not less than. }
inches within the junction box. . . : ft
pene rey co ge pee Sed 7 inks
(a3 ()4 (6 (8 i ‘
he
25, The power conductors in type NMS cable are manufactured in sizes _.
(a) #14-H6 (b) #4 - #4 (c) #14 - #2 (Gd) #12- #2
TH
81 . OB #1,
26, Factory assembled nonmetallic conduit with conductors is not permitted __
12 9 ~
v0
(a) in cinder fill 6 5
(b) In exposed indoor locations
(c) eneased or imbedded in concrete
(d) in underground locations subject to Severe corrosive influences :
27. A receptacle is permitted in a Class I Division Il circuit if
1. attachment plug is not depended on to interrupt current
IL, current does not exceed 3 amps at 120 volts nominal
IIL cord does not exceed 3 feet
IV. only necessary receptacles, provided with warning labels
(a)Tand I only (b)Fand1V only (61, !1and Tit only (a) 1, 1, Ul and 1V
28, Ata gasoline dispensing, self service station which is unattended, the emergency disconnect for
circuit leading to dispensing equipment, must be located more than ___ feet from the dispensers.
Ge geo gest ;
(a) 3 (b)S (c) 10 (a) 20
29. For a motor an instantaneous trip circuit breaker shall be used any if __and if part of a listed
combination motor controller having coordinated motor overload and short circuit and ground fault
protection.
(a) permitted by the local jurisdiction (b) available (c) adjustable (d) damping equipped
30, Receptacles on construction sites shall not be connected'to the same __ conductor of multiwire
circuits that Supply temporary lighting,
(a) grounded (b) ungrounded (c) grounding (d) none of these ‘
j 1
31, Boxes and fittings shall be’__ in a Class IH], Division 1 location
(a) seated (b) dustproof (c) dusttight (a) not allowed
32. All metal surfaces that are within 5 feet ofthe inside walls of a spa or hot tub and not separated
from the spa or hot tub area by a permanent barrier shall be bonded together except 1. !
1, drain fitting attached to metal piping
TL, metal fitings attached to the spa or hot tub structure
IIL. towel bars
(a)ITonty (b)Honly (c)1Tonly (a) 1, Mand HL
ar
82
ENT AEE TST TST? OB #1
33, Fixed lighting fixtures for anesthetizing locations shall be at least____ feet above the floor.
eg 0 yee 2
(a) 12 (b) 10 (8 @s 7 oo
34, When installing a type FCC system under carpet squares, not more than __ crossings of cable
runs shall be permitted at any one point.
@1 ()2 @4 (a5
35. The temperature rating associated with the ampacity of a conductor shall be so selected and
coordinated as to not exceed the __ temperature rating of any connected términation, conductor, or
device. |
L lowest Il. highest IHL. ambient
(a)Lonly (b)Wonly (c) MS UT only (d)1, Wor WL.
36. The ampacity for branch circuit conductors supplying X-ray equipment marked (50. amps
momentary) would require an ampacity of/at least___amps.
(a) 25 (b) 46 (©) 50 (A) 62.5
37, Forelevator systems that regenerate power back into the power source, which is unable to absorb
the regenerative power under overhauling elevator load condition, _.
(a) a transfer switch shall be installed to connect the regenerative power to the main power
source
(b) a disconnect switch shail be labeled "caution regenerative power available"
(©) a means shall be provided to absorb this power
(d) the elevator shall be locked out immediately
38, Bare bulbs installed backstage that may come into contact with combustible material shall be
guarded and provided with at least 2 __ inches of air space.
oem gow swe goo Mee
@1i2 (by2 (6 (a) 12
39. The alternate power source for a dentist office is required to carry the connected load for a
minimum of ____ hours.
(a)3 (b)2 (©) 112 (d)astongas possible
40. A fixture wire used for controling X-ray equipment shall havea minimum conductor size of__.
(a) #20 (b) #18 () #12 (a) #8 41, The walls and roofs of transformer vaults shall be constructed of materials that have adequate |
Structural strength forthe conditions with a minimum fire resistance of 3 hours unless protected by
automatic sprinklers. A typical 3-hour construction is __. i
(a) reinforced concrete 6 inches thick (b) reinforced conerete 4 inches thick
(©) reinforced concrete 3 inches thick (d) studs and wall board construction
42, An assembly that has concealed parts ftom process of manufacturing, and cannot be inspected.
before being installed at a building site without disassembly, damage, or destruction, is a definition
of,
(@ enclosed (b) guarded (c) closed construction (d) inaccessible
43, Taps to individual motors on an irrigation machine branch circuit supplying three 2 hp motors,
39, 460v, shall have a minimum size of at least___ copper.
(a) #8 (b) #10. (© #12 (@) #14
44, Alan __ isa jack or terminal bus that serves as the collection point for redundant grounding of
electric appliances serving a patient vicinity or for grounding other items in order to eliminate
electromagnetic interference problems.
(a) hazard current (b) exposed conductive surface
(@ isolated power system (@ patient equipment grounding point
48. A/an __. is a unitized segment of an industrial wiring system in which orderly shutdown is
necessary to-ensure safe operation,
(a) emergency standby electrical system (b) selective load pick-up electrical system
(©) critical branch electrical system (@) integrated electrical system
46, Where the maximum branch circuit short circuit and ground fault protective device ratings are
shown in the___ overload relay table for use with a motor controller or are otherwise marked on the
equipment, they shall not be exceeded even if higher values are allowed, -
(a) UL (b) manufacturer's (c) standard (d) Code
47. Themaximum height forthe coupling means toan indoorelectrie vehicle charging station is__
feet, ~
le
(2) 4°(b)412 (8 (@) 10 :
48. On a delta connected 3g, 4-wire system the phase arrangement for the busbar with the highest
voltage to ground is____ phase.
(a) neutral (b)C ()A (@B
eq itt OB #4
49. Free standing office partitions are permitted to have outlets supplied by a single flexible cord as
long as_.
(a) extra hard usage type are used
(b) #12 or larger conductors are used with an insulating equipment grounding conductor
(©) the cord does not exceed 2" in length
(2) ail of these + .
50. __ shall be placed in all service entrance motor control centers to isolate service busbars and
terminal from the remainder of the motor control center.
(a) Barriers (b) Shunt trips (c) In line fuses (a) HACR breaker
51. Roof mounted photovoltaic arrays located on dwellings shall be provided with__ to reduce fire.
hazard.
(@) ground fault protection (b) automatic extinguishing system
(©) alarms (@) smoke detectors ’
52, In.a motion pictute studio, the voltage drop on a branch circuit supplied by a 120v single phase
3 wire system with 60 volis on each of two ungrounded conductors to a grounded neutral conductor,
that is used for the purpose of reducing objectionable noise in audio/video production shall not
exceed !._ percent.
(3 (b)2 (18 15
53.Ifa___ serves as the disconnecting means for a permanently connected motor- driven appliance
of 1/8 horsepower or more, it shall be located within sight from the motor controller.
Leireuit breaker 1. switch
(a) only (b) Honly (c) either Lor 11 (d) neither I or Hl
54, Cablebus shall be securely supported at intervals not exceeding ‘_ feet.
aaa meg cone L
@6 G10 OL wis : an
55. The allowable ampacity of a listed extra-hard usage #14 cord with a temperature rating of 90°C
(194° F) is umperes used for border lights and based on an ambient temperature of 30°C, 86°F
and the cable is not in direct contact with equipment containing heat-producing elements.
(a) 14 (b) 25 (€) 28 (@) 20
56. _ electrical equipment enclosures shall be permitted where a natural draft ventilation system
prevents the accumulation of gases at cell lines.
(a) Rear accessible (b) Isolating type (c) General purpose (d) Flush mounted OB #1
51, Auxiliary gutters shall be permitted to supplement witing spaces at meter centers, distibution
centgss, switchboards, and similar points of wicing systems and may enclose __
L switches Il. overcurrent devices If. conductors IV. busbars
(a)1& Monly (b)L& Wonly (c)&MWonly (a) UI & IV only
58. For over 600v busways having sections located both inside and outside of buildings shall have
at the building wall
(a) vapor seal (b) fire barrier (c) condulet (d) ventilated enclosure
59, For signaling circuits not exceeding 24 volts, the current required shall not exceed_ ampere
where protected by an overcurrent device or an:inherently limited power source.
(a1 )4 (6 (d)10
60. Where coaxial cable is directly buried for a community antenna television system, the cable shal!
be separated at least _ inches from conductors of any light or power or Class I circuit.
pom ee hm Lao San
(a)2 (b)6 (c) 12 (4) 24
61, Where a transformer vault is constructed with other stories below it, the floor shall have @
minimum fire resistance of __“' hours,
(a)4 (b)3 ©)2 @1V2 “
62, Fire alarm systems include__. va
sprinkler water flow IL, alarm notification Il. guard's tour
(a)Tonly (b)Wonly (c)Land 11 only (4) 1, Hl, and 1k
63, A park trailer is intended to be for __
I. seasonal use II. a temporary office II, a permanent dwelling
(a)Tonly (b) only (c) Monty (a) 1, Uf, or Ht
___ are typically used as enclosures for splicing or terminating telephone cables.
I. Splice cases “Ul. Terminal boxes III. Octagonal boxes
(a)Tonly (b)Tand IH only (€) Land I only (d) none of these
vu
86 0B #4
65. The operating grounding conductor for amateur transmitting stations shall not be fess than #__
‘copper. :
(a) 18 (b) 16 (©) 14 (a) 10
66, The terminal block for the termination of flat cable assemblies shall have distinetive and durable
marking for color or word coding, The grounded conductor section shall have a white marking or
other suitable designation, The next adjacent section of the terminal block shall have a__ marking.
(a) black (b) blue (¢) red (@) green
67, Anelectrical contractor has received the plans and specifications for a skating rink. The National
Electrical Code rules governing this occupancy are in Article __.
(a) 518 (b) 520 (b) 710 (4) 820
68. In a swimming pool, electric equipment that depends on submersion for safe operation shall be
protected against overheating by a/an__.
(a) toggle switch (b) thermal overload ’ (c) in line fuse (d) low water cut off
69. Direct curtent.or low frequency ac shall be permitted in the control portion of the heating
equipment, Electronic circuits utilizing-solid state devices and tubes shall be permitted printed 7
circuits or wires smaller than __. a
(a) #18 (b) #16 (c) #20 (d) #24
70. Bridge wire contact conductors for cranes shall be kept at least 2 1/2 inches apart, and where the
span exceeds -_ feet, insulating saddlgs shall be placed at intervals not exceeding __.feet.
2 AI yo ge er
(a) 50-80 (b) 60.80 (c) 80-60 (d) 80-50 . ‘
vH
87 OB #2
OPEN BOOK. —
EXAM
#2
70 QUESTIONS
TIME LIMIT - 2 HOURS
TIME SPENT MINUTES
SCORE, | %o | OB #2
MASTER OPEN BOOK EXAM #2 ‘Two Hour Time Limit
1, The various components required fora complete induction heating equipment installation shall be
connected by properly protected __
L coaxial cable“II. busbar IU. multiconductor cable
(@)Fonly (b) only (c) or Ufonly (@) 1,1, or I
2. Conductors installed for interior wiring of ar
ational vehicle shall have a minimum insulation
rating of 90°C (194°F) and engine compartment wiring shall have an insulation rating of !_.~
(a) 250°C (482°F) (b)
YC (302K) (c) 128°C (302°) (A) 90°C (194°F)
3. Coaxial cables for a fire alarin system shall be permitted to have copper covered steel center
conductors with a ininimum of 30 percent copper and shall be listed as Type __
'
t
I.FPL II. FPLR II. FPLS IV. FPLP
(a)Land Wonly (b) for 1 only (¢)1, 1, or TV only (a) 1, 1, HH, or IV
4, Remote control circuits for safety control equipment shall be classified as if the failure of the
equipment to operate introduces a direct fire or life hazard,
(a) Class 1 (b) Class 2. (c) Class 3. (4) none of these
5. In fixed electrostatic spray zones, signs shall be conspicuously posted to__.
SL. restrict access to qualified personnel only
Il, identify emergency exit routes
UL. designate the zone as dangerous with regar to fire and accident
IV. identify the grounding requirements for all elecirically conductive objects in the spray area
(a)Tonly (b) Land If only -(c)1, 18, and IV only (¢)1, 1, HL, and 1V
6. Ina park trailer, lighting switches shall be rated not less than ___amperes 120/125 volts and in
no case less than the connected load.
(a) 10 (b) 15 (€)20 (a) 28
7. Class | power-limited circuit shall be supplied from a source having @ rated output of not more
than 30 volts and __ volt amperes.
(a) 1000 (b) 1200 (c) 1500 (a) 2000 8, Transformers insulated with listed less flansunalle liquids having a fire point of not less than 300°
C shall be permitied to be instalted in Type lor Type 1! buildings ifthe transformer, rated ___ volts
or less.
a
(a) 660 (b) 7200 (c) 35,000 (d) 69,000
9.__ of fusesandcircuit breakers foremergency circuit overcurrent protection, will ensure sele.
clearing of fault currents, and increase overall reliability of the system,
(a) Frequent interchange (b) GFCI protection (c) Man
al operation (d) Coordination
10. Insulation of conductors intended for use in the secondary circuit of electric welders shall be
L flame retardant I. silicone IL TBS IV. TFE .
(a)Tonly (b)i& only (c) 1 & Hl only (d) 1, & LY only
11, When installing X-ray equipment connected to 120 volt branch circuit, « grounding type
attachment plug cap and receptacle of proper rating shall be permitted to serve as a disconnecting
means if the branch circuit is rated __ amperes or less
(a) 15 (b) 20 (€) 30 (a) 50
12. A subsystem of the emergency system consisting of feeders and branch circuits, meeting the
requirements of article 700 and intended to provide adequate power needs to ensure safety to patients
and personnel, and which are automatically connected to alternate power sources during interruption
of the normal power source is the __
(a) essential system (b) critical branch (c) life safety branch (d) line isolation monitor
13, A dry cell battery shall be considered an inherently limited ___ power source, provided the
voltage is 30 volts or less and the capacity is equal to or less than that available from series connected
No. 6 carbon zine cells.
(a) Class 1 (b) Class 2 (¢) Class 3 (d) none of these
14, Where stage smoke ventilators are released by an electrical device, the circuit operating the
device shall be __ and shall be controlled by at least two externally operable switches.
(a).a pressure switch (b) a limit switch (c) normally closed (4) normally open
15. A fi
a__fire alarm circuit
arm circuit that is powered by an output voltage of not more than 600 volts is defined as
(a) NPLFA (by PLFA (c) FPLP_ (d) FPL
vu
90 OB #2
16. Premise power distribution systems jointly controlled by a signaling between the energy
controlling equipment and utilization equipment is a__ system
(a) remote control, signaling, and power limited circuit
(b) fire alarm
(©) communication circ
(d) closed loop and programmed power distribution :
\
17. To interrupt currents over 1200 amperes at 250 volts, or over 600 amperes at 251 to 600 volts,
a___ of special design listed for such purpose shall be used, 2
NL switchIL. circuit breaker IIL, bypass isolation switch
(a) 1 & Wonly. (b) 1 & only (c) only (@) I, 1, or HL
18. Open runs of braid-covered insulated conductors used for over 600 volts shall have a flame
retardant saturant applied to the braid covering after installation unless this protectant is factory
installed. This treated braid covering shall be stripped back a safe distance at conductor terminals,
a distance of not less than _ for each kilovolt of the conductor to ground voltage of the circuit.
ace" De tic an
(@) I" 2" 3" 6"
19, An AC adjustable voltage motor that does not have the maximum operating current on the
nameplate, shall have the ampacity of the branch circuit conductors based on __of the values given
in tables 430-149 and 430-150.
(a) 80% (b) 100% (c) 125% (d) 150%
20. Individual office partitions of the freestanding type or groups of individual partitions that are
electrically connected, mechanically contiguous, and do not exceed” feet when assembled, shall
be permitted to be connected by asingle flexible cord and plug. \
gern gre age" gy :
(a)10 (b) 15 ()24 (@)30 e a pee
21. Coaxial cable shall be permitted to deliver low energy power to equipment directly associated
with radio frequency distribution system ifthe voltage is not over / ~ volts and ifthe current supply
is from a transformer or other device having energy limiting characteristics.
(a) 24 (b)30 (©) 60 (A) 70.7
iw
22. Any interruption of the circuit, even circuits as low as __volts, either by any switch, of loose
or defective connections anywhere in the cireuit, may produce a spark sufficient to ignite flammable
anesthetic agents.
{a)10 (b) 12 (©) 24 (4) 30
TH 5
om - OB #2
23, Portable switchboards and portable power distribution equipment in an exhibition hall shall _.
1. be supplied only from listed power outlets of sufficient voltage and ampere rating ‘
Il, be protected by overcurrent devices accessible to the general public
If be provided with provisions for connection of an equipment grounding conductor
(a) only (b)1and only (c) Land Ml only (a) 1, 1, and HI 7
24, For the purpose of this Code and unless otherwise indicated, the term "mobile home” includes
L park trailers I. travel trailers ILL recreational vehicle IV. manufactured homes
(a) Fonly (b) Hand WI only (c)1V only (a) Land TV. only
25. Branch circuits for heating and air conditioning equipment located on the elevator car shall not
have a circuit voltage in excess of __ volts = |
: (a) 120 (b) 240 (c) 480. (a) 600
26. Supply circuit conductors to a fire pump shall
L._ be physically routed outside the building
I be routed through the building where installed under or enclosed within 1" of concrete
“ILL. be routed through the building where installed under or enclosed within 2” of concrete
(a)¥only (b)Wonly (c) Lor Honly (4) for Ii only
27. Wall mounted remote control stations for remote control switches operating at ___or less shall
be permitted to be installed in any anesthetizing location.
(a) 12 volts (b) 24 volts (¢) 30 volts (4) 60 volts
28. A ___ arranged to be locked in the open position shall be provided in the leads from the runway
contact conductors or other power supply on all cranes and monorail hoists.
I. mushroom head push button “IL. motor circuit switch “IL circuit breaker
(a) Lor If only (b) only (¢) Hor Monty (a) 1,1, or IIL
29. Conductors that supply one or more welders shall be protected by an overcurrent device rated or
set at not more than _" of the conductor rating,
(a) 80% (b) 125% (c) 150% (d) 300%
mw
92 -ope2 |
| 30. For small motor compressors not having the locked rotor current marked on the nameplate, or
for small motors not covered by the FLC tables, the locked rotor current shall be assumed to be -___
i times the rated load current. :
i fa) 11/2 (b) 13/4 ()212 (d)6
31. A bonding jumper not smaller than __ copper or equivalent shall be connected between the. |
antenna systems grounding electrode and the power Brounding electrode system at the building or
structure served where separate electrodes are used,
(a) #12 (b) #10 (c) #8 (a) #6
32. Size #18 or #16 fixture wires, and flexible cords shall be permitted for the control and operating
circuits of X-ray and auxiliary equipment where protected by notlarger than _ ampere overcurrent
= devices.
(a)6 (b)15 (©) 20 (a) 30
712733. Allmanual switches forcontrolling emergency lighting in theater or motion picture theater shall
i be located in __.
pe ' :
| 1. projection booth Il.'on the side of the stage or platform III. in the lobby
(a)Lonly (b)Uonly (¢) Wonly (a) Hor WM only
34, For a photovoltaic power source, one conductor of 2 wire system rated over ___volts and a
neutral conductor of a 3 wire system shall be solidly grounded.
(a) 50 (b) 60 (c) 90 (4) 100 .
35, Where high speed keying circuits dependent on the effect of "oscillator blocking" are employed,
the peak radio frequency output voltage during the blocked portion of the eycle shall not exceed |
volis in heating equipment units employing radio, frequency converters.
(a) 24 (b) 30 (©) 100 (a) 120
36, Sealed battery cells shall be equipped with a__ or the battery cell shall be designed to prevent
scatter of cell parts in event of a cell explosion.
I. flame arrester II. pressure release vent
a)Tonly (b) Honly (6) both Land I (d) none of these OB #2
37. A transformer vault ventilated by natural circulation of air to an outdoor area, ‘shall have a
ventilating opening not less than 1 sq. ft. for any capacity under __ kVA.
(a) 25 (b) 50 (©) 78 (a) 150
38. When a cord and plug connection is provided for connecting lighting equipment for use with
relocatable wired office partitions, the cord! length shall not be longer than’__ ‘eet.
gett got gt geet mm
(a)3 (b)6 (©)9 (d)12
39, Duty on wheelchair lift and stairway chair lift driving machine motors shall be rated as_
uous (b)
(a) co jermittent (¢) varying (d) short-time
40. A building or part thereof used on a 24 hour basis for the housing of four or more persons who
are incapable of self preservation because of age, physical limitation due to accident or illness, or
mental limitations, such as mental retardation/developmental disatafity, mental illness or chemical
dependency is aan __
(a) limited care facility (b) nursing home
(©) psychiatric hospital (dl) ambulatory health care center
bles in sizes #1/0 through 500 kemil are installed, continuously
shall not exceed __pereent
41, Where single conductor ¢
covered for more than 6 feet with unventilated covers, the ampaciti
of the allowable ampacities in Tables 310-17 and 310-19.
(a) 50 (b) 60 (c) 65 (d) 80
42. Flat cable assemblies may be installed __.
1, for small power loads outdoors, not subject to physical damage
HL as tap devices for lighting and small appliances,
IIL for small power loads in hoistways
(a)Lonly (b) only (¢)Tand 11 only (a) 1, 11, and IIL
43, In panelboards, where close proximity of bare metal parts such as busbars does not cause
excessive heating, parts of the same polarity at switches, enclosed fuses, etc,, shall be permitted to
(a) be placed a minimum of 1/2” apart
(b) be placed a minimum of 3/4" apart
(c) be placed a minimum of 1 1/4" apart
(d) be placed as close together as conve
jence in handling will allow
TH
94 OB 62
44. All high voltage parts, including X-ray whes, shall be mounted within __ enclosures,
(a) metallic (b) nonmetallic (c) grounded (dl) ventilated
45. It shall be permissible to use 3/8" flexible metal conduit in lengths not exceeding __ feet for
interconnection between paired fixture sections operating at 1000 volts or less.
a oe ;
ee eke .
(a) 6 (b)12 (e) 18. (a) 25 a0 5
46. __ is/are permitted to be installed for deck area heating at a swimming pool
I. Radiant heaters that are installed more than § feet from the inside walls of the pool
Il, Unit heaters that are rigidly mounted and are installed more than 5 feet from the inside walls of
the pool
ILL Radiant heating cables that are embedded in the coner
leck a minimum of 2 inches in depth
(a) Tonly (b) and il only (c) and Wi only (a) 1, 1, or IL
47. Onac circuits, __ shall be permitted to disconnect a motor rated 2 horsepower or less and 300
volts or less having a full load current rating not more than 80 percent of the ampere rating of the
switch,
(a) general use acide snap switches (b) the branch circuit overcurrent device
(©) general use snap switch suitable only for ae (a) none of these
48. In theaters and similar locations, __ is/are permitted wiring method(s).
IMT I, NM cable Ill, Ml cuble IV. noametallic racevyays encased in 2" of concrete
(a)Land If only (b) Wand Ul only (c) Hand kV only (d) 1, HL, and IV only
49, Cabinets and cutout boxes that contain devices or apparatus connected within the cabinet of box
to more than __ conductors, including those of branch circuits, meter loops, feeder circuits, power
circuits, and similar circuits, but not including the supply circuit or continuation thereof, shall have
back wiring spaces or one or mote side wiring spaces, side gutters, or wiring compartments.
(a)8 (b)10 (c)2! (a) 30 ~
50. Aminimum of __ percent of ll recreational vehicle sites with electrical supply shall be equipped
with a 30 ampere 125 volt receptacle.
(a) 5 (b) 25 (€) 50 (a) 70
nH + OB #2
51. Liquidtight flexible nonmetallic conduit and rigid nonmetallic conduit shall be permitted to
enclose the leads to the motor provided __.
1. the required equipment grounding conductor is connected to the motor
IL, the required equipment grounding conductor is connected to the junction box to the motor
IIL. the leads are solid .
IV. the leads are stranded and shall not be larger than #10 :
(a)Tand Wonly (b) Wand UL only (¢)1,1, and 1V only (d) 1, Hl, and I only
52, A wireway or auxiliary gutter installed in a theater shall riot exceed
I. 20 percent of the interior cross sectional area of the gutter or wireway
Tl, 40 percent of the interior cross sectional area of Ue yutter or wireway
= If. not more than 30 current carrying conductors at any cross section of the gutter or wireway
(a)1only (b) only (c)1and Ii only (4) 1, H, and I
53, Unattended self service gasoline stations shall have emergency controls to shut off all power to
dispensing equipment. These controls shall be located more than ___ feet but less than _ feet from
the dispensers. wy we ye
BP GR gy Poe soe” coe?
(a) 20-100 (b) 20-50 (c) 10-100 (d) 10-50
_.. shall not be considered safety control
54, When installing remote control signaling circuits,
equipment, one
1. household heating and air conditioning equipment
TI, water temperature regulating devices ~
IIL. room thermostats
(@)Lonly (b) only () Wlonly (@) 1,0, and UE
'55. A lighting fixture installed in or on the wall! of a storable pool shall _.
“Lave a transformer with a primary rating not over 150 volts
TL. have an impact resistant polymeric lens, fixture body, and transformer enclosure
UL. have a fixture lamp that operates at 120 volts or less
(a)Lonly (b) Honly (c)Land only (4) Wand Il only
ct ney ap OB #2
56, In closed loop distribution systems, listed hybrid cable consisting of power, communications, and
signaling conductors shall be permitted under « common jacket. The signaling conductors shall not
be smatler than #’____copper. \
(@) 16 (b)18 (c)22 (a) 24
57. The protective grounding conductor for transmitting stations shall be as large as the lead-in, bur
not smaller than #__ copper.
(a) 16 (b) 18 (©) 12 (4) 10
58. Direct curent or low frequency ac shall be permite in the control portion ofthe heating
equipment, This shall be limited to not over =
(a) 24 (b) 48 (c) 100 (a) 250
59, Secondary circuits of current and potential instrament transformers shall be grounded where the
primary windings are connected to circuits of volts or more to ground and, where on.
switchboards, shal! be grounded irrespective of voltage.
(2) 30 (b) 100 (©) 230 (a) 300
60. The demand factor to be applied in sizing the fecder iat supplies power to 7 elevators with a 50
percent duty eycle is. + percent.
(a) 125 (b) 82 (©).79 (d).77
61. Remote crane or hoist controls that may introduce hazardous electrical conditions into the cell
line working zoné shall ethploy one or more of the following systems.
ML. Isolated and ungrounded control circuit in accordance with s
Il, Nonconductive rope operator.
TIL Radio.
tion 668-21 (a).
(a)Lonly (b) only (¢) MLonly (a) 4, 1, or I
62, In health Gare facilities, where ground fault protection is provided for operation of the service
disconnecting means or feeder disconnecting means, an additional step of ground fault protection
shall be provided in the next level of feeder disconnecting ineans downstream toward the toad. The
additional levels of ground fault protection shall not be installed _
1. onelectrical systems that are not solidly grounded wye systems with greater than 150 volts to
ground.
Tl, on the load side of an essential electrical system transfer switch,
IHL. between the on site generating unit and the essential electrical system transfer switch
(a)Zonly (b) Wonly () Hand Hf only (4) 4, 11, and AT OB #2,
63. A room air conditioner rated __ shall not be cord and plug connected,
(a) over 240 volts (b) over 250 volts (c) over 3hp (d) over Shp
64. The grounding electrode to which the portable or mobile equipment system neutral impedance
is connected shal! be isolated from and separated in the ground by at least __ feet from any other
system or equipment soung electrode,
ee ee
fo 10 12 (2
65. When installing open wiring on insulators ina dry tocation, conductors shall be permitted to be
separately enclosed in flexible nonmetallic tubing. The tubing shall be in continuous length not
exceeding feet and secured tothe surface by straps at intervals not exceeding 4 1/2 fet.
90? uso? caw i
(@)6 ()10 (1S (@50 ee '
66, Communication wires and cables shall be separated at least __ from conductors of any electric
light or power circuits, Class 1, or non power-limited fire alarm circuits, o inedium power network
powered broagband communicatigs circuits.
ge we som
(2) 0" (b)2" 4" (aor
67. The rated ampacity of conductors and overcurrent devices of a feeder for two or more branch
circuits supplying X-ray units shall not be less than 100 percent of the momentary demand rating of
the two largest X-ray apparatus plus __ percent of the momentary ratings of other X-ray apparatus,
(a) 20 (b) 50 (c) 80 (4) 90
68. The equivalent continuous current rating for the selection of branch circuit conductorsand branch
circuit devices for a center pivot irrigation machine shall be equal to 125 percent of the motor
: nameplate full load current rating of the largest motor plus "of the sum of the motor nameplate
full load current ratings of all remaining motors.
(a) 60% (b) 75% (c) 80% (d) 100%
69. The supply to a portable switchboard shall be by means of listed extra-hard usage cords or cables.
Where connectors are used in the supply conductors, there shall be a maxinrum number of *_
interconnections (mated connector pairs) where the total length from supply to switchboard does not
: exceed 100 feet.
(a)2 )3 @4 (@)6
70, Indoor electric vehicle charging stations shall be provided with mechanical ventilation sized to
provide the minimum ventilation in cubic feet per minute, foreach parking space equipped to charge
an electric vehicle. A L5 amp, 120 volt single phase charging space will require _ CFM.
(a) 24 (b)37 (0) 49. (a) 64
a 70 QUESTIONS
TIME LIMIT - 2 HOURS |
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TIME SPENT [| | MINUTES
uhh nolvinw MASTER OPEN BOOK EXAM #3 Two Hour Time Limit
1. Exposed live parts within porcelain fixtures shall be suitably recessed and s0 loc
it improbable that wires will come in contact with then... There shall be a spaciny
between live parts and the mounting plane of the fixture.
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(a) 1/4" (by V8" (c) 172" (a) 3/4" .
2, All conduit referred to her
provides 3/4” taper per foot
in shall be thr
~~ Standard conduit cutting die ye
(a) rigid (6) NPT (c) metal (4) American
3. Outlets for specific appliances Such as laundry equipment, shall be within 6 _ feet of the
appliance.
[229m 1600mm 2iroAM dose mm
(a) 4 (b)6 (c)8 (4) 10 .
.
ye
‘An enclosure designed either for surface or flush mounting and provided with aframeyinat, or trim
in which a swinging door or doors are or may be hung is @ 22
(a) panetboard: (b) switchboard (¢) wireway (@) cabinet
5. Grounding ofa metal raceway used to protect Romex is required if the raceway is LS. feet or over
within reach of ground or grounded metal.
Ioomm 2qooum 2250%% 7652 mom
(a)6 (b)8 (10 (a) 25
6. Toprevent the entrance of moisture, service-entrance conductors shall be connected to the service-
drop conductors __.
AL below the level of the termination of the service-entrance cable sheath
MII. below the level of the service head
(a)Fonly (b) Honly (@ both Tand I (@) neither I nor HL
7, The area of square inches for a #6 bare conductor is _.
(a) 0.017 (b) 0.027 (c) 0.207 (2) 0.184
8. Which of the following is not a standard size fuse?
(@) £10 amp (b) 125 amp (©) 75 amp (a) 250 amp
eI aH
100 |
9. Which of the following is NOT considered an electric vehicle by the Code?
(b) vans - :
(c) busses
(@) trucks, -
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10. The N.
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(@) industrial fork lity 1's |
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1. gas welders II. DC rectifier arc welders Ill. motor-yenerator are welders TV, resistance welders? |
(a) and IV only (b) 1, Wand Monly (cH, Wd and 1¥ only (4) 1,1, HL and LV
11. Type FCC cable witing system is designed for installation under _-_
(a) tile (b) carpet (¢) carpet squares (@) concrete
12, Service cables mounted in contact w
feet,
a building shall be supported at intervals not exceeding >
3000 mm 1600%% Armas F300 mw
(a)10 ()6 (22 (412
13, Multispeed motors shall be marked with ihe code letter designating the locked-rotor kva
horsepower for the highest speed at which tie motor
(a) can be stalled (b) can be started
(©) needs to be rated (@) can run safely
14, Soft-drawn or medium-drawa copper, lead in conductors for receiving antenna systems shall be
permitted wheie the maximum span between points of support is less than ___ feet.
[2C0nm 92r0mN Ler—OMM Zoro mim
(a) 35" (b) 30 "(©) 20 (a) 10
15. Non-heating leads of heating cables operating in-240 voll systems, shall have a2
(@) red (b) blue (@ yellow @) brown oe Ae
: ia hs
16, Wading pools are those that are constructed! on or abipyt ste grSund And are capable of holding
water to'a maximum depth of _.
ean — poomm yocomy s209me
(a) 18" B30" ()42" (He {a)8 (b)10 (c) 12 (IS
19, Flexible cord shall be considered as protected by a 20 amp branch circuit overcurrent device if
cordis
(a) not less than 6' in length (b) #20 or larger
(© #18 or larger (d) #16 or larger
a _ 8B 29-— :
17, Branch circuit conductors within 3" of a ballast, within the ballast’ com,
art
recognized for use at temperatures not lower than 90 degices C, such as insulation one ie
LTHHN I. THW M1, TW IY. a :
(a) only (b)Tand IV only (1, Iand IV (d) 1,1, fil and 1V |
18, Amusement rides shall be maintained not less than |*__ feet in’ any direction from overhead |
conductors operating at 600 volts or less, except for the supply conductors to the ride. |
Brmmm 28m gummM Too we 7 |
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20, Infrared lamps for industrial heating appliances shall have overcurrent protection not exceeding
amps,
(a) 30 (b) 40 © 50 (a) 60
ature limitation of ML cable is based on the
21. The tempe
(a) ambient temperature (b) conductor insulation
(©) insulating materiats used in the end seal (d) none of these
22, Overcurrent devices shall not be Located ia the vicinity of easily ignitible material such asin.
(a) bedrooms (5) clothes closets (c) kitchens \(d) garages
23. A new building will have two service heads serviced by one service drop. What is the maximum
distance apart that the Code permits these heads to be located? .
(a) 36" 400 9
(b) 48" P22 mom
(©) 6 feet 7800 mim
(@) there is no maximum distance as long as the service entrance conductors are long enough
to reach the service drop conductors
nH
102 24, Liquidtight flexible metal conduit is shipped in what sizes minimum and maximum)
farm seamen Pabee 1Drmen BOI REN cote
(a) 172" t0.4"" (b) 1/2" to 6" ()3/4" to.S" (A) 1/2" to 2"
25. The rated primary current of an electric resistance welder is
1. 2.8 times the primary current divided by the duty cycle
Tl. determined by the percentage of time during which the welder is loaded
IIL the rated kva multiplied by 1000 and divided by the rated primary voltage, using values given
on the nameplate
|
TV. the current drawn from the supply circuit ducing each welder operation at the particular heat tap.
and control setting used
(a) Land IM only (b) Mand IV only (c) 1, Hand Ii (@) 1, 1, If and IV
26. Renewable type contacts shall be provided on all knife switches rated 600 volts designed foruse
in breaking current over amperes.
oe :
(a) $0 (b) 100 (¢) 150 (a) 200 7
27. Voltage shall notexceed 600 volts between conductors on branch circuits supplying only ballasts
for electric-discharge lamps in tunnels with a height of not less than __ feet.
shoamn ygeor™ Sym EZeower ps wD beget
Ip
(a),12 (b) 15 (c} 18 (d) 22
28, 15 and 20 ampere receptacles located in pediatric areas shall be __.
(a) tamper resistant (b) isolated (¢) GLY (d) specification grade
29. A nipple contains six #8 THW copper current-carrying conductors. The ampacity of each
conductor would be _amperes,
(a) 24 (6) 50 (0) 35 (40
30. Type MTW insulation would be used for
(a) switchboards only (6) machine tool wiring
(© feeders only (@) fixtures
31, Which of the following would_not be approved in.all Class If locations?
(a) flexible connections (b) threaded bosses
(c) dust-tight boxes (a) EMT. OB a3
\e-
we P30, Emergency lighting, emergency power or both, in a building or group of buildings will be
available within the time required for the application, but not to exceed one of the following:
(a) 5 seconds (b) 10seconds (c) 30 seconds («l) 60 seconds
33, Aluminum grounding conductors shall not be used where __.
1. within 18” of earth
IL, subject to corrosive conditions
IEE in direct contact with masonry
(a) Tonly (b) only (©) only (a) 1, Hand HT
34. The heating of conductors depends on ____ values which, with generator field control, are
reflected by the nameplate current rating of the motor-generator set driving motor rather than by the
rating of the elevator motor, which represents actual but short-time and intermittent F.L.C. values.
(a) root-mean-square current (b) voltage
(c) ambient temperature (@) ozone
\ 35. Bach vented cell shall be equipped with a___ designed to prevent destruction of the cell.
\ |
(a) gas arrestor (b) electrolyte (@) flame arrestor (d) hydrometer
36.Only composition or metal-sheathed, porcelain, keyless lampholders equipped with suitable
means to guard lamps from physical damage and from film and film scrap hall be used at_tables.
Leutting IL. viewing” IIL patching
(a) Lonly (b)Honly (c) i only (d) f, Hand
37. Parking garages used for packing or stornge. and where no.repair work is dbne, open flame,
welding, or the use of volatile flammable liquids are
(a) Class 1 (b) Class I (¢) Class IM (@) not classified,
38. The maximum weight of alight fixture that may be mouinted on the screw shell of a brass socket
is ___ pounds
(a) 2 (b)6 ()B (IO
39, The basic photovoltaic device which generates electricity when exposed to light is a
(a) battery (b) diode (¢) solar cell (@) mandrel
TIt
104 OB #3
40, The National Electrical-Code scope includes.
(a) conductors and equipment on certain public or private premises
(b) conductors on all buildings or premises where electrical power is employed
(©) conductors and equipment on all buildings, premises and conveyances where electrical
power is employed 7
(@) conductors and equipment wherever and whenever electricity is employed
41, Bare conductors on a 30 volt lighting syst
finished floor, unless listed for a lower heig
aoeem Boom 2OOMM YoEO Kes Low
(@)7 (b)8 (©) 9° (a) 10 oa
» shall not be installed Jess than __ feet above the
42. For a closet that permits access to both sides of a hanging rod, the storage space shall include the
volume below the highest rod extending. - on cither side of the rod on a plané horizontal to the
floor extending the entire length of the rod, yoy
Gone 200m Jod HH 9H me
(a) 6" (b)8" (©) 12" (a) 15"
43, Open conductors on insulators must be covered when they are within __ feet of a building,
Som sooth yggomet goon
(a) 10 (b)12 (©) 1S (@) 25 : oe
44, Flexible cords shall be connected to devices and to fittings that tension will not be transmitted
to joints or terminal screws. This shall be accomplished by _.
(a) a knot in the cord (b) winding with tape
(©) a special fitting (dyall of these
45, Open conductors run individually as service drops shall be _.
Vinsulated I’bare UL. covered
(a)Lonly (b) UM only () WL only (@) either I or II
46. In patient care areas of a hospital, the equipment grounding terminal bars of the normal and
essential electrical system panelboards shall be bonded together with an insulated continuous copper
conductor not smaller than ___. oe
Ban fhe! ge Neto ree a
(a) #8 (46 (ey HO @air eae be koe
47. The radius of a2" conduit containing conductors without lead sheath shall not be less than
inches.
gore PRM GR goo yam
(a) 12 (b) 31 (©) 21. (a) 36
rit
105 OB #3
48. All heating cables, the splice between the heating cable and nonheating leads, and 2" minimum
of the nonheating lead at the splice shall be embedded in plaster or dry board in the same manner as
the heating cable
yer wore oo sn
(ay3" (b)6" (@)8" (a) 12"
49. FCC cable connections shall use connectors identified for their use, such'that ____ against
dampness and liquid spillage are provided.
L.sealing I. insulation 111. electrical continuity
(@)Lonly (b)Wonly (©) Monly (4) 1, Wand It
50.The ciscuit supplying an autotransformer-type dimmer installed in theaters, and similar places
shall not exceed how many volts between conductors?
out:
(a) 480 volts (b) 277 volts (¢) 240 volts (A) 150 volts
51. For swimming poo! water heaters rated at more than $9. amperes that have specific instructions
regarding bonding and grounding, only those parts designated to be bonded shall be bonded, and only
those parts designated to be grounded shall be grounded.
(a) 80 (b) 40 (c) 30. (a) 20
52. All fixed wiring above Class I locations in a repair garage shall be in__
1. flexible nonmetallic conduit IL. rigid nonmetallic conduit “HI. TC cable
(a) Fonly (b) Honly (c) Land Hf only (d) 1, 1 and UE
53. Itshall be permissible to extend ___ of surface metal raceways through dry walls, dry partitions,
and dry floors.
froma godwan 1840 mr
(a) 2 feet (b) 3 feet (c) 6 feet @) unbroken lengths
$4, A two pole circuit breaker that may be used for protecting a3 phase corner grounded delta circuit
shall be marked _
4
4)
(a) 18 120/240v (b) 19-30 (c) Lo/2s/30 (d) 480Y/277v— >t) \ \