PSC Previous Question-Skilled assistant grade II-6/2015

#1. A semiconductor without any impuritiy is known as….?

Intrinsic semi conductor

Extrinsic semi conductor

PN Junction

Semi conductor

#2. A transformer which increase the voltage level is known as….?

Auto transformer

Ideal Transformer

Step up transformer

Step down transformer

#3. In single phase energy meter …. type damping is used:

Fluid friction

Air friction

Eddy current

Gravity control

#4. DOL starter do not reduce……?

Voltage

Starting current

Starting torque

Running torque

#5. ln 3 phase supply system motors “single phasing” means:

Advantage

DOL

Supply

Fault

#6. For holding object , cutting and twisting wires which tool is used:

combination pliers

nose pliers

nippers

none of the above

#7. A battery is a combination of…?

capacitors

chemical cells

inductors

resistors

#8. In earthihg which of the following is used as earth lectrodes:

metal pipes

cross arm

egg insulator

porcelain disc

#9. A device which converts electrical energy into mechanical energy is termed as :

capacitor

generator

motor

converter

#10. In two wattmeter method of power measurement phase angle is above 60, then total power is:

W2

W1 + 2

W2 - W1

W1

#11. An instrument which is used to test the insulation resistance is:

PF meter

voltmeter

meggar

hydro meter

#12. Positive electrode in a volta cell is :

Zinc

Copper

Lead

Carbon

#13. Which of the following is used as a filament in metal filament lamp:

Tungston

Nichrome

Germanium

Carbon

#14. In a electric mixer ….. type motor is used:

capacitor motor

universal motor

stepper motor

repulsion motor

#15. ACSR conductor is used in….:

over head system

under ground system

house wiring

factory wiring

#16. ln a single phase system of distribution service connection is made by …..w ire:

flexible wire

CTS wire

weather proof wire

TRS wire

#17. Transformer oil is a type of….:

mineral oil

vegitable oil

edible oil

palm oil

#18. Cleat wiring is used for:

house wiring

chemical plant

factory wiring

temporary wiring

#19. Semiconductor have …. type of temperature coefficient of resistance:

positive

negative

zero

none of these

#20. Power factor is the ratio of resistance and….:

reactance

capacitance

inductance

impedence

#21. In an electric heater, heating coil is generally made upon…?

Nichrome

Tungsten

Aluminium

Poecelain

#22. Electricity is a form of..

energy

spark

shock

lightening

#23. MCB means….?

Main circuit breaker

Miniature circuit breaker

Metal circuit breaker

Major circuit breaker

#24. A transistor has…..PN junction?

1

2

3

4

#25. …….type single phase motor cannot change its direction of rotation?

universal motor

shaded pole motor

repulsion motor

shunt motor

#26. SMPS Means..

simple mechanical power supply

sinusoidal mode power supply

switched mode power supply

simple main power supply

#27. The pressure plate of an ordinary electric iron made by…?

aluminium

cast iron

zinc

copper

#28. Sodium vapour lamp is best suited for…?

house wiring

street lightining

factory lightining

drawing room lightining

#29. Electrically charged atom is generally termed as…?

iron

cation

isotope

ions

#30. According to indian electricity rule, total earth resistance should be less than….?

5 ohm

5 mega ohm

50 mega ohm

500 mega ohm

#31. Carbon arc lamp were generally used in….?

vehicle

street light

cinema projectors

torch lights

#32. Conductors have…….specific resistance?

high

low

very high

no

#33. For plate earthing, the size of copper plate is….?

60 cm x 60 cm x 3 mm

60 cm x 60 cm x 3.15 mm

60 cm x 60 cm x 6.3 mm

50 cm x 50 cm x 3.15 mm

#34. A commutator is a device used in DC generators to convert…?

AC to DC

DC to AC

Single phase to three phase

Three phase to single phase

#35. Breather of a distribution transformer contains..?

sand

lead oxide

silica gel

sodium chloride

#36. Open circuit test conducted in a transformer to find out…..?

heat loss

copper loss

iron loss

stray loss

#37. Flemmings right hand rule used to find out….?

direction of force

direction of flux

direction of emf

direction of torque

#38. To reduce hysteresis loss the core of a DC machines is generally made of….?

silicon steel

cast iron

wrought iron

carbon steel

#39. Wire gauge is used to measure….of a conductor?

length

size

height

bradth

#40. To change DOR of a 3phase motor…?

to change sequence of any two phase

to change phase and neutral

to change positive and negative terminals

to change windings

#41. Negative electrode of dry cell is made up of….?

copper

zinc

aluminium

carbon

#42. In three phase power supply system, earth wire is inducted by…?

red

yellow

black

green

#43. A two coil heater gives its maximum heat output,when the coils are in….?

series

parallel

series parallel

off

#44. In a single phase system of supply, which of the following is used to test the supply correctly?

neon tester

ammeter

wattmeter

test lamp

#45. Transformers and alternators are generally rated in…?

KVA

KVAR

KW

atts

#46. In a domestic refrigerator, heat inside is taken out through….?

capacitor

condensor

evaporator

compressor

#47. Germanium and silicon are generally used as….:

insulators

semi conductors

resistors

conductors

#48. In alternators supply is taken out through…?

slip rings

split rings

commutator

rocker arm

#49. Which of these is the strongest diamagnet material?

iron

steel

bismuth

aluminium

#50. In a single phase motor, centrifugal switch is used to disconnect….?

supply

running winding

starting winding

none of these

PSC Previous Question-Skilled assistant grade II-6/2015

Results

#1. A semiconductor without any impuritiy is known as….?

#2. A transformer which increase the voltage level is known as….?

#3. In single phase energy meter …. type damping is used:

#4. DOL starter do not reduce……?

#5. ln 3 phase supply system motors “single phasing” means:

#6. For holding object , cutting and twisting wires which tool is used:

#7. A battery is a combination of…?

#8. In earthihg which of the following is used as earth lectrodes:

#9. A device which converts electrical energy into mechanical energy is termed as :

#10. In two wattmeter method of power measurement phase angle is above 60, then total power is:

#11. An instrument which is used to test the insulation resistance is:

#12. Positive electrode in a volta cell is :

#13. Which of the following is used as a filament in metal filament lamp:

#14. In a electric mixer ….. type motor is used:

#15. ACSR conductor is used in….:

#16. ln a single phase system of distribution service connection is made by …..w ire:

#17. Transformer oil is a type of….:

#18. Cleat wiring is used for:

#19. Semiconductor have …. type of temperature coefficient of resistance:

#20. Power factor is the ratio of resistance and….:

#21. In an electric heater, heating coil is generally made upon…?

#22. Electricity is a form of..

#23. MCB means….?

#24. A transistor has…..PN junction?

#25. …….type single phase motor cannot change its direction of rotation?

#26. SMPS Means..

#27. The pressure plate of an ordinary electric iron made by…?

#28. Sodium vapour lamp is best suited for…?

#29. Electrically charged atom is generally termed as…?

#30. According to indian electricity rule, total earth resistance should be less than….?

#31. Carbon arc lamp were generally used in….?

#32. Conductors have…….specific resistance?

#33. For plate earthing, the size of copper plate is….?

#34. A commutator is a device used in DC generators to convert…?

#35. Breather of a distribution transformer contains..?

#36. Open circuit test conducted in a transformer to find out…..?

#37. Flemmings right hand rule used to find out….?

#38. To reduce hysteresis loss the core of a DC machines is generally made of….?

#39. Wire gauge is used to measure….of a conductor?

#40. To change DOR of a 3phase motor…?

#41. Negative electrode of dry cell is made up of….?

#42. In three phase power supply system, earth wire is inducted by…?

#43. A two coil heater gives its maximum heat output,when the coils are in….?

#44. In a single phase system of supply, which of the following is used to test the supply correctly?

#45. Transformers and alternators are generally rated in…?

#46. In a domestic refrigerator, heat inside is taken out through….?

#47. Germanium and silicon are generally used as….:

#48. In alternators supply is taken out through…?

#49. Which of these is the strongest diamagnet material?

#50. In a single phase motor, centrifugal switch is used to disconnect….?

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