Practice# 2

1. In an AC circuit a value of watts divided by a value of volt-amps, which of the

following indicates close to unity?
(A) maximum current for the load
(B)high power factor
(C) maximum voltage for the load
(D) low power factor

2. A transformer core is made of ______.

I. copper II. steel III. aluminum
(A)I only (B) II only (C) III only (D) I,II or III

3. A qualifying term indicating that the circuit breaker can be set to trip at various
values of current and/or time within a predetermined range is called____.
(A)adjustable (B) instantaneous trip
(C) setting (D) inverse time

4. A motor control circuit is the circuit of a control apparatus or system that carries
the _____.
(A) load (B) power (C) signals (D) energy

5.It is costumary to speak of the electromotive force as the ___ of a circuit.

(a) voltage (b)rms (C)current (d) impedance

6.Flexible metal conduit shall be secured by and approved means at intervals not
exceeding____ feet and within 12" on each side of every outlet box, junction box,
cabinet, or fitting.
(a) 3 (b) 4 (c) 4 1/2 (d) 6

7. The resistance of a 3.6 kw heater when operated from a 120 volt circuit is ____
ohms.
(a) 3 (b)4 (c) 30 (d) 120

8. Materials containing numerous free electrons are ____.

(a) ferrous materials (b) good insulators
(c) good conductors (d) high numerally resistivity scales

9. An insulated conductor with a white or gray finish shall be permitted as ____

conductor where permanently reidentified to indicate its use, by painting or
other effective means at its termination, and at each location where the
conductor is visible and accessible
I. grounded II. hot III. grounding IV ungrounded
(a)I only (b) II and IV only (c) III only (d) II only

1|Page
10.If the DC resistance of a #500 kcmil copper conductor 1000 feet in length is
.0258 ohms the DC resistance for a #1000 kcmil copper conductor 1000 feet
in length would be ____ ohms.
(a)0.0258 (b) 0.01515 (c) 0.0129 (d) 0.00643

11. A three-phase ungrounded 480v system in a plant has three ground detector
lights. Two lamps are bright and "B" phase lamp is dark. This indicates that
there is ground fault on____.
(a) A phase (b) B phase
(c) C phase (d) any two phases have shorted

12. Metal cabinets used for lighting circuits are grounded in order to ____.
I. eliminate electrolysis
II. simplify wiring
III. limit the voltage to ground
IV. facilitate overcurrent device operation
(a) I only (b) I and II only
(c) III only (d) III and IV only

13. The ___ is the current in amperes a conductor can carry continuously under the
conditions of use without exceeding its temperature rating.
(a) load (b) demand (c) connected load (d) ampacity

14. The chain wrench can be used ____.

I. with one hand after the chain is around the conduit
II. in confined places and close to a wall
III. for many sizes of conduit
(a) I,II and III (b) I and II only
(c) I and III only (d) II and III only

15. Nipples are short pieces of conduit____.

(a) threaded at both ends
(b) threaded on one end
(c) that may or may not be threaded
(d) that are never threaded

16. Encased with a material or composition or thickness that is not recognized by

the Code as electrical insulation is defined as covered ____.
(a) cable (b) conduit (c) wire (d) conductor

17. Interior locations protected from weather but subject to moderate degrees of
moisture, such as some basements, some barns, some cold-storage warehouses
and the like, the partially protected locations under canopies, marquees, roofed open
porches, and the like, shall be required to have fixtures marked" Suitable for
___ locations."
(a) dry (b) damp (c) moist (d) wet

2|Page
18. Enclosures for overcurrent devices shall be mounted in a ____ position unless
in individual instances this is shown to be impracticable.
(a) horizontal (b) diagonal (c) open (d) vertical

19. An overcurrent trip unit of a circuit breaker shall be connected in series with
each____.
(a) ungrounded conductor (b) grounded conductor
(c) overcurrent device (d) transformer

20.Receptacle outlets in a residence shall be installed so that no point along th

floor line in any wall space is _____, measured horizontally, from an outlet in
that space.
(a) less than 6' (b) more than 6'
(c) less than 12' (d) none of these

21. A ground is a conducting connection ,whether ____ or accidental, between an

electrical circuit or equipment and the earth, or to some conducting body that
serves in place of the earth.
(a) identifying (b) intentional
(c) conducted (d) none of these

22. Boxes used for ceiling outlets in all types of concealed wiring installed in
buildings of all types of construction are____.
(a)square (b) oblong (c) octagonal (d) devices

23. Grounding conductor shall not be connected by ____.

(a) exothermic welding (b) soldered fittings
(c) listed pressure connectors (d) listed clamps

24.You have 120 volts at the panel and 115 volts at the load. What is the
percentage of voltage drop?
(a) 5 % (b)4.35% (c) 4.17% (d) 3%

25. The ampacity of a solid or stranded conductor of the same material is the same
if it has the same _____.
(a) diameter (b) circumference
(c) cross-sectional area (d) insulation

26. The _____ is the sevice conductors between the terminal of the service
equipment and a point usually outside the building, clear of building walls, where
joined by tap or splice to the service drop.
I. service drop
II. service entrance conductors, overhead system
III. service equipment
(a) I only (b) II only (c) III only (d) I,II and III

3|Page
27.If the circit voltage is increased, all else remains the same, only the _____ will
change.
(a) resistance (b) current (c) ampacity (d) conductivity

<A>28. To ensure proper adhesion between wire, solder and a lug, the temperature
of the ____must be above the melting point when they are brought togeter in
soldering.
I. wire II. solder III. lug
(a) I,II and III (b) I and II only
(c) II and IIIONLY (D) II only

29. The conductor with the highest insulation temperature rating is _____.
(a) THWN (b) RH (c) RHH (d) THW

30.One should use an insulated basket grip to attach a pull line to the conductor. A
bare steel grip should not be used because it will ____.
(a) react with the conductor
(b) stretch the conductor
(c) score the conduit during the pull
(d) reduce the coefficient of friction

31.The resistance of an electrical conductor increases with____.

I an increase in ambient temperature
II. a decrease in csa
III. an increase in conductor length
(a) I only (b) I and II only
(c) III only (d) I,II and III

32. Ferrous raceways and fittings do not need to be suitably protected against
corrosion when installed in areas where ___Exist.
(a) acid chemicals (b) alkali chemicals
(c) fertilizer (d) different temperatures

33. The minimum cover requirement for rigid nonmetallic conduit without concrete
encasement is ____inches.
(a) 6 (b) 12 (c) 18 (d) 24

34. A nipple can be filled ____ percent of its total csa.

(a) 31 (b) 40 (c) 53 (d) 60

35. When calculating the cubic inch capacity required for a box, 3 equipment
grounding conductors are counted as ____ conductor/s.
(a) 1 (b) 2 (c) 3 (d) not counted

4|Page
36. How many receptacles are required in the hallway of a residence that is 15 feet
in length?
(a) 1 (b) 2 (c) 3 (d) none are required

37.A device that establishes a connection between two or more conductors or

between one or more conductors and a terminal by means of mechanical
pressure and without the use of solder is defined as a____
(a) shrink sleeve connector (b) boot connection
(c) pressure connector (d) T-tap

38. A drawing showing the floor arrangement of a building is referred to as a

(an)____.
(a) perspective (b) isometric
(c) surface G. B. (d)plan

39. Readily accessible is _____.

(a) requiring only a 6 foot ladder
(b) requiring to move only small obstacles
(c) within 50 feet
(d)capable of being reached quickly for operation

40. A fitting is ____.

(a) part of a wiring system that is intended primarily to perform an electrical
function
(b) pulling cable into a confined area
(c) to be suitable or proper for
(d) part of a wiring system that is intended primarily to perform a mechanical
function

41. The neutral conductor___.

(a) is always the "white" grounded conductor
(b) carries the balanced current
(c) note 8 never applies
(d) carries the unbalanced current

42.An oil switch is a switch having contacts which operate under _____.
I askarel II. oil III other suitable liquids
(a) I only (b) II only (c) I and II only (d)I,II or III

43. All wiring must be installed so that when completed ____.

(a) it meets the current-carrying requirements of the load
(b) it is free of shorts and unintentional grounds
(c) it is acceptable to Code compliance autorities
(d) it will withstand a hy-pot test

44. 60 cycle frequency travels 180 degrees in how many seconds?

5|Page
 (a)1/60 (b) 1/120 (c) 1/180 (d) 1/30

45. A wattmeter indicates _____.

I. real power
II. apparent power if PF is not in unity
III. power factor
(a) I only (b) II only (C) III ONLY (d) I,II and III

46.Of the following, improving the commutation of a DC generator is most often done
by means of ____.
(a) a compensator
(b) interpoles
(c) an equalizer
(d)a series rheostat in series with the equalizer

47. Code requirements may be waived ____.

(a) by the fire department
(b) by the utility company
(c) by the autority having jurisdiction
(d) under no circumstances

48. Ampacity is ____.

(a) the current -carrying capacity of conductors expressed in volt-amps
(b) the current -carying capacity expressed in amperes
(c) the current-carrying capacity of conductors expressed in amperes
(d) the current in amperes a conductor can carry continuously under the
conditions of use without exceeding its temperature rating

49. An electric circuit that controls another circuit through a relay is a _____circuit.
(a) remote - control (b) pilot
(c) low-energy power (d) transfer

50.Concrete, brick or tile walls are considered as being ____.

(a) isolated (b) insulators
(c) grounded (d) dry locations

51. Which of the following systems will furnish single-phase, three-phase, and two
voltage levels?
(a)three-phase, 3-wire (b) three-phase,4-wire
(c) two-phase,3-wire (d) single-phase,4-wire

52. All edges that are invisible should be represented in a drawing by lines that are
____.
(a) dotted (b) curved (c) solid (d) broken

53. The definition of kcmil is ____.

6|Page
 (a) correction factor (b) one million
(c) one-thousand circular mils (d) one-hundred mils

54. An appliance that is not easily moved from one place to another in normal use is
a ______appliance.
(a) fastened in place (b) dwelling-unit
(c) fixed (d) stationary

55. A point on the wiring system at which current is taken to supply utilization
equipment is called ____.
(a) a receptacle (b) a junction (c) an outlet (d) a tap

56._____is a protective device for assembly as an integral part of a motor or motor-

compressor and which, when properly applied, protects the motor against
dangerous overheating due to overload and failure to start.
(a) thermal protector (b) thermal cutout
(c) thermal overcurrent (d) thermal heat anticipator

57. Listed equipment must be installed or used in accordance with___.

(a) any instructions included in listing or labeling
(b) the blue print
(c) instructions provided by the manufacturer of the equipment
(d) the electrician

58.Compliance with the provisions of the Code will result in____.

(a) freedom from hazard (b) an efficient system
(c) good electrical service (d) convenient operation

59. The horsepower rating of a motor_____.

(a)is a measure of motor efficiency
(b) is the input to the motor
(c) cannot be changed to watts
(d)is the output of the motor

60.What is the function of a neon glow tester?

I.determines if circuit is alive
II. determines polarity of DC circuits
III. determines if circuit is AC or DC current
(a) I only (b) II only (c) III only (d) I,II and III

61.Power in a three-phase system may be measured with a minimum of ____.

(a) one wattmeter (b)two voltmeters
(C)two ammeters (d) none of these

62. What are Optical Fiber Cables used for?

I.transmit light for control

7|Page
 II.signaling
III. communications
(a) I only (b) II only (c) III only (d) I,II and III

63. Something that would effect the ampacity of a conductor would be___.
I.voltage II. amperage III.length IV temperature
(a) I only (b) II only (c)III only (d) IV only

64. En electric bell outfit would be used to check for___.

(a)voltage (b) ampacity (c) continuity (d) current

65. An ammeter is connected ____.

(a)in series with the load
(b)in parallel with the load
(c)both in series and in parallel with the load
(d)neither in series nor in parallel with the load

66.The Code requires all circuits to have at least ____and adequate grounding.
(a) an ungrounded wire and a grounding wire
(b) two hot wires and a grounding wire
(c) at least two wires
(d) a hot wires and a grounding wire

67.Which of the following is not permitted for connecting conductors #6 and larger
to terminal parts?
(a) solder lugs (b) pressure connectors
(c) splices to flexible leads (d) wire binding screws

68. ____are used to provide explanatory material, references to other

sections,precautions to be observed, and further mandatory requirements.
(a) mandatory rules (b) exceptions
(c) fine print notes (d)listings

69. Accessible (as applied to wiring methods) is ____.

I. not permanently closed in by the structure of finish of the building
II. capable of being removed or exposed without damaging the building
structure or finish
(a)I only (b) II only
(c) both I and II (d)neither I nor II

70.A transformer would most likely have a ___efficiency.

(a) 60% (b) 70% (c) 80% (d) 90%

71. Continuous duty is ___.

(a) a load where the maximum current is expected to continue for three hours or
more.

8|Page
 (b) a load where the maximum current is expected to continue for one hour or
more.
(c) intermittent operation in which the load conditions are regularly recurrent
(d)operation at a substantially constant load for an indefinitely long time

72.The definition of dustproof is ___.

(a) an electrical enclosure with sealing gaskets to prevent the equipment from
overheating from an accumulation of dust
(b)constructed so that dust will not enter the enclosing case under specified test
conditions.
(c) protected so that dust will not interfere with its successful operation
(d)a housing that seals dust from contacting energized parts

73.It is generally not good practice to supply lights and motors from the same circuit
because ____.
(a) lamps for satisfactory service must operate within closer voltage limits than
motors
(b) overloads and short circuits are more common on motor circuits
(c) when motors are started, the large starting current causes a voltage drop on
the circuit and the lights will blink or burn dim
(d) all of these

74. Covered, shielded, fenced or enclosed by means of suitable covers, casings,

barriers, rails, screens, mats, or platforms is the definition of ___.
(a) guarded (b) protected (c) isolated (d) enclosed

75. The overhead service conductors from the last pole or other aerial support to
and including the splices, if any, connecting to the service entrance conductors
at the building or other structure is the ____.
(a) service load (b) service lateral
(c) service drop (d) service supply

76. Without live parts exposed to a person on the operating side of the equipment
is called___.
(a) dead front (b) isolated
(c) externally operable (d) interrupted

77. Frequency is not a problem in most electrical work because it ____.

(a) never affects circuit values
(b) varies directly with voltage
(c) is a constant value
(d) only concerns DC

78. If the voltage is doubled, the ampacity of a conductor____.

(a) increases (b)decreases
(c)doubles (d) remains the same

9|Page
79. To calculate the power used by an appliance (not motor driven) one needs to
know____.
I. voltage and current
II. current and resistance
III. voltage and resistance
(a) I only (b) II only (c)III only (d) I,II or III

80.Fixture wire shall not be smaller than #____.

(a)16 (b) 18 (c)20 (d) 22

81. A toaster will produce less heat on low voltage because___.

(a) its total watt output decreases
(b)the current increases
(c)the resistance has changed
(d) its total watt output increases

82. It is good practice to use ____ in a long horizontal straight run of conduit.
(A) expansion joints (B) flexible joints
(C) universal joints (D) insulation joints

83. The ability of a device to open the maximum short or overload at the device, at a
particular point in the electrical system is its____capacity.
(A) operating (B) interrupting
(C) maximum (D) rated

84. To find the circular-mil area of a stranded conductor, the most accurate
method is to_____.
(A) use a micrometer
(B) use a dial-o-meter
(C) square the number of strands
(D) multiply the number of strands by the circular-mil area of one strand

85. All equipment located within_____feet of the inside wall of a pool shall be
grounded.
(A) 15 (B) 10 (C) 8 (D) 5

86. Mica is commonly used for_______.

(A) pole insulators
(B) commutator bar separators
(C) panelboards
(D) appliance insulation

87. A hook on the end of a fish tape is NOT to____.

(A) keep it from catching on joints and bends
(B) tie a swab to

10 | P a g e
 (C) tie the wires to be pulled
(D) protect the end of the wire watts

88. Which of the following statements is NOT an advantage of using an

autotransformer?
(A) less expensive
(B) high efficiency
(C) better voltage regulation
(D) safe for stepping down higher voltages

89. ______is/are the letter(s) used to indicate capacitive reactance in a circuit.

(A) XL (B) Z (C) HZ (D) XC
90. Utilization equipment uses______.
(A) chemical or mechanical energy
(B) electrical energy only
(C) energy for electrical purposes
(D) only mechanical energy

91. A megger is used to measure_____.

(A) reactance (B) specific gravity
(C) insulation resistance (D) current

92. A________is a device which serves to govern in some predetermined manner

the electric power delivered to the apparatus to which it is connected.
(A) switch (B) feeder
(C) branch-circuit (D) controller

93. Incandescent light bulbs when operated at a voltage less than the rated
voltage, will normally result in______.
(A) more light (B) more current
(C) shorter bulb life (D) longer bulb life

94. The volt-ampere rating in an AC circuit is a way to indicate the______power

(A) true (B) real (C) apparent (D) peak

95. In a three-phase, 4 wire wye system having 277v for lighting, the three-phase
motors would be operating on a voltage of_____volts.
(A) 208 (B) 480 (C) 240 (D) 190

96. Four heater coils with a given voltage will consume the most power when
connected_____.
(A) all in series
(B) two in parallel
(C) all in parallel
(D) two parallel pair in series

11 | P a g e
97. A voltmeter measures______.
(A) only voltage to ground
(B) voltage difference
(C) AC voltage only
(D) none of these

98. In a series circuit with four unknown resistive loads, it is certain that the_______.
(A) voltage drop across each load will be the same
(B)the current flowing through each load wil be the same
(C) the wattage consumed by each load will be the same
(D) the total current in the circuit is the sum of all four loads

99. The lead covering on conductors is used________.

(A) for grounding
(B) for moisture proofing
(C) for easier soldering
(D) to prevent vibration
100. The reason for rigid steel conduit to be galvanized or enameled is to__.
(A) provide better grounding
(B) prevent corrosion
(C) make it easier to thread
(D) make painting easier

12 | P a g e