1.What is the device number for instantaneous over current relay?
a.51
b.52
c.50
d.46
2.Minimum thickness of concrete in a concrete encased electrode is
ram.
a.80
b.60
c.70
d.50
3.Which of the following is not considered in choosing a fuse?
a.voltage rating
b.contact resistance
c.interrupting rating
d.ampere rating
4.In EPIRA law,WESM means,
a.wholesale electricity spot market
b.wholesale energy spot market
c.waste energy spot market
d. world electrical mechanical society
5.Capacitors are rated in,
a.kVA
b.kW
c.kVAR
d.μF
6.What will happen if the power factor is decreased?
a.current will decrease
b.no change in current
c.current will increase
d.current will double
7.Permeability of material means,
a.strength of the material
b.conductivity of the material for magnetic flux
c.ability of the material to produce magnetic flux
d.ability of a material to hold magnetic flux permanently
8.Nuclear energy is produced in the nuclear reactor by the process called,
a.fusion
b.fission
c. both fusion and fission
d.diffusion
9.Stainless steel rods less than 16mm in diameter, non ferrous rods or their equivalent shall
be listed and shall not be less than __mmn in diameter.
a.13
b.16
c.20
d.25
10. The detector in a fiber optic system is usually,
a.PIN dioide coupled to a FET amplifier
b.Schottky dioid
c.LED
d.all of these
11.Which part of a capacitor is heavily doped?
a.plate
b.base
c.dielectric
d.terminal
12.Advantage of FM to AM band is,
a.noise
b.wave length
c bandwidth
d.frequency
13.Which part of a capacitor is capable of storing energy?
a.plate
b.gbasc
c.dielectric
d.terminal
14.In a circuit breaker the time duration from the instant of the fault to the extinction of the
arc is known as,
a. total clearing time
b. operation time
c.lead time
d.lag time
15. In a circuit breaker the time duration from the instant of fault to the instant of
energizing of the trip coil is known as,
a.protection time
b, operation time
c.lead time
d.lag time
16.I a balanced 34 wye connected circuit the line voltage are equal,
a and so are the lie current
b.to the phase voltage
c.but the line currents are equal d. but the phase voltage are equal
17. What instrument is used to test if the coil is short-circuited?.
a.hi-pot
b.ohm meter
c.megger
d.growler
18.The resistance of a conductor,when its temperature is increased,
a.remains constant
b.varies
c.increases
d.decreases
19. Ohm's law doesn't apply to,
a.conductors
b.semi-conductors
c.ac circuit
d.all of these
20.What is the minimum number of wattmeters required for measuring power of a 3
balanced load?
a.2
b.1
c:4
d.3
21.In two wattmeter method of measuring 3 power,the readings of the wattmeters are
identical when,
a.load of one f the phases is zero
b.power factor is unity
c.power factor is 0.5
d.neutral is grounded
22.In two wattmeter method of measuring,balanced 3Φ power,the reading of one of the
wattmeters is twice to that of the other when,
a pf is unity
b.pf is 0.707
c.pf is 0.866
d. a neutral wire is provided
23.Voltage of a circuit element is measure by,
a ammeter parallel with the clement
b.voltmeter parallel with the element
c.voltmeter in series with the element
d. ammeter in series with the element
24.Circuit breakers used for over current protection of 3 circuits with voltages over 600V
nominal,shall have a minimum of over current relays operated from
current transformers.
a.3
b.2
c.6
d.5
25.The term power budgeting refers to,
a.the cost of fiber cable,connectors,etc.
b.the loss of power due to defective optical fiber accessories.
c.total power available minus attenuation losses
d.comparative costs of fiber and copper installations
26.The service disconnecting means shall be installed,
a.outside the building
b.inside the building
c.at the meter
d.either a or b
27.Altemator frequency is determined by,
a.voltage
b.speed
c.number of poles
d. number of poles and speed
28. It causes most of the power to be dissipated as heat
a. capacitive reactance
b.inductive reactance
c.susceptance
d.resistance
29.The service conductors between the terminals of the service equipment and a point
outside the building,clear of obstructions where joined by splice or tap to the
service drop is called,
a.main conductor
b.service entrance conductor c.service lateral
d.none of these
30.The type letter TW on an insulated conductor indicates,
a.thermal with nylon
b.thermoplastic moisture resistant
c.thermoplastic weather proof
d. thermoplastic moisture and heat resistant
31.A device which serves to govern in some predetermined manner the electric power
delivered to the apparatus to which it is connected is called,
a.switch
b.feeder
c.relay
d.controller
32.It is a general term including material,fittings,devices,appliances, fixtures, apparatus and
the like used as part or in connection with an electrical installation.
a wiring system
b.utilization equipment
c.service equipment
d.equipment
33.It is.a term used for devices that utilizes electric energy for a purpose like
motors,furnaces, heathers,light sources and the like is,
a.wiring system
b. utilization equipment
c.service equipment
d.equipment
34.Long duration voltage variation is a variation of rms value of the voltage from nominal
voltage for a time greater than,
a.one-iminute
b.2hrs
c.3hrs
d.10 minutes
35. In EPIRA law PSALM means,
a.power sector assets and liabilities management corporation
b.private service of assets and liabilities management corporation
c.power sector.assets and liabilities management
d.private sector assets and liabilities management corporation
