Q1:- If a DC motor starts with jerk when starting, what may be the reason?
(A) Line voltage too high
(B) Short circuit of the field wiring
(C) Pitted starter contact terminals
(D) Wrong grade of carbon bushes
(E) Open circuit
ANSWER:-C
Q2:- What is the normal voltage of a fully charged lead acid cell?
(A) 1.1 V
(B) 2.2 V
(C) 1.5 V
(D) 3 V
(E) 4.1 V
ANSWER:-B
Q3:-. Invertor converts-
(A) DC to AC
(B) AC to DC
(C) DC to DC
(D) AC to AC
(E) None of these
ANSWER:-A
Q4:-Which of the following meters cannot measure both DC as well as AC?
(A) Moving iron meter
(B) Thermocouple meter
(C) Dynamometer
(D) Induction-type meter
(E) None of these
ANSWER:-E
Q5:-. When installing pipe electrodes, one end of the pipe shall be kept atleast _______cm above the ground.
(A) 2.5
(B) 5
(C) 10
(D) 20
(E) 40
ANSWER:-If any one knowes plz tell
Q6:-. Normally busbar should not be erected at a height less than-
(A) 2.1 m
(B) 2.75 m
(C) 3.2 m
(D) 4.1 m
(E) 5.2 m
ANSWER:-B
Q7:-The illumination required for a work place where fine work is performed will be in the order of-
(A) 500 lumens /sq. meter
(B) 1000 lumens / sq.meter
(C) 1500 lumens /sq. meter
(D) 2000 lumens / sq.meter
(E) 2500 lumens /sq. meter
ANSWER:-C
Q9:-LCD stands for _____________.
(A) Logical Code Display
(B) Light Crystal Diode
(C) Liquid Character Display
(D) Logical Character Display
(E) Liquid Crystal Display
ANSWER:-E
Q10:- Inductance of a coil depends upon -
(A) Number of lines
(B) Area of the coil
(C) Length of the coil
(D) All (A),(B),(C)
(E) None of these
ANSWER:-D
Q11:-The acting contacts for a medium/high voltage circuit breaker are made of-
(A) Stainless steel
(B) Hard pressed carbon
(C) Porcelain
(D) Copper tungsten alloy
(E) Both (B) and ( C)
ANSWER:-D
Q12:-A light emitting diode produces light when it is:
(A) Unbiased
(B) Forward biased
(C) Reverse biased
(D) None of these
(E) Any of (A),(B),(C)
ANSWER:-B
Q13:- The minimum gauge of copper earth wire to be used for a 3-pin 15 A, 250V socket is :
(A) 12 SWG
(B) 14 SWG
(C) 15 SWG
(D) 16 SWG
(E) 18 SWG
ANSWER:-IF anyone knowes about it tell
Q14:- Field coils are wound with:
(A) Enamelled copper wire
(B) Steel wires
(C) Bare copper wire
(D) Stainless steel wire
(E) Aluminium wires
ANSWER:-
Q15:- A choke is used as a resistance in :
(A) A.C circuits
(B) D.C circuits
(C) Half-wave rectifier circuits
(D) Both A.C and D.C circuits
(E) All of these
ANSWER:-A
Q16:- In cables, the thickness of the layer of insulation on the conductor depends upon:
(A) Current capacity
(B) Voltage
(C) Power factor
(D) Reactive power
(E) Temperature
ANSWER:-A
Q17:- You have to rewind a motor whose operating temperature is about 130°C. Which insulating material would you select?
(A) Fibre
(B) Mica
(C) Cotton
(D) Paper immersed in oil
(E) Leatheroid paper
ANSWER:-B
Q18:- A moving iron ammeter reads 10 A. What is the peak current of the oscillation?
(A) 7.07 A
(B) 1.414 A
(C) 70.7 A
(D) 28.2 A
(E) 14.1 A
ANSWER:-B
Q19:- Thermal relays are often used in:
(A) Generator protection
(B) Generator protection
(C) Motor starters
(D) Both (A) and (B)
(E) None of these
ANSWER:-C
Q20:-. Power companies are interested in improving the power factor to _______.
(A) Reduce the line current
(B) Increase the motor efficiency
(C) Increase the volt-amperes
(D) Decrease the power
(E) Increase the power
ANSWER:-A
(A) Line voltage too high
(B) Short circuit of the field wiring
(C) Pitted starter contact terminals
(D) Wrong grade of carbon bushes
(E) Open circuit
ANSWER:-C
Q2:- What is the normal voltage of a fully charged lead acid cell?
(A) 1.1 V
(B) 2.2 V
(C) 1.5 V
(D) 3 V
(E) 4.1 V
ANSWER:-B
Q3:-. Invertor converts-
(A) DC to AC
(B) AC to DC
(C) DC to DC
(D) AC to AC
(E) None of these
ANSWER:-A
Q4:-Which of the following meters cannot measure both DC as well as AC?
(A) Moving iron meter
(B) Thermocouple meter
(C) Dynamometer
(D) Induction-type meter
(E) None of these
ANSWER:-E
Q5:-. When installing pipe electrodes, one end of the pipe shall be kept atleast _______cm above the ground.
(A) 2.5
(B) 5
(C) 10
(D) 20
(E) 40
ANSWER:-If any one knowes plz tell
Q6:-. Normally busbar should not be erected at a height less than-
(A) 2.1 m
(B) 2.75 m
(C) 3.2 m
(D) 4.1 m
(E) 5.2 m
ANSWER:-B
Q7:-The illumination required for a work place where fine work is performed will be in the order of-
(A) 500 lumens /sq. meter
(B) 1000 lumens / sq.meter
(C) 1500 lumens /sq. meter
(D) 2000 lumens / sq.meter
(E) 2500 lumens /sq. meter
ANSWER:-C
Q9:-LCD stands for _____________.
(A) Logical Code Display
(B) Light Crystal Diode
(C) Liquid Character Display
(D) Logical Character Display
(E) Liquid Crystal Display
ANSWER:-E
Q10:- Inductance of a coil depends upon -
(A) Number of lines
(B) Area of the coil
(C) Length of the coil
(D) All (A),(B),(C)
(E) None of these
ANSWER:-D
Q11:-The acting contacts for a medium/high voltage circuit breaker are made of-
(A) Stainless steel
(B) Hard pressed carbon
(C) Porcelain
(D) Copper tungsten alloy
(E) Both (B) and ( C)
ANSWER:-D
Q12:-A light emitting diode produces light when it is:
(A) Unbiased
(B) Forward biased
(C) Reverse biased
(D) None of these
(E) Any of (A),(B),(C)
ANSWER:-B
Q13:- The minimum gauge of copper earth wire to be used for a 3-pin 15 A, 250V socket is :
(A) 12 SWG
(B) 14 SWG
(C) 15 SWG
(D) 16 SWG
(E) 18 SWG
ANSWER:-IF anyone knowes about it tell
Q14:- Field coils are wound with:
(A) Enamelled copper wire
(B) Steel wires
(C) Bare copper wire
(D) Stainless steel wire
(E) Aluminium wires
ANSWER:-
Q15:- A choke is used as a resistance in :
(A) A.C circuits
(B) D.C circuits
(C) Half-wave rectifier circuits
(D) Both A.C and D.C circuits
(E) All of these
ANSWER:-A
Q16:- In cables, the thickness of the layer of insulation on the conductor depends upon:
(A) Current capacity
(B) Voltage
(C) Power factor
(D) Reactive power
(E) Temperature
ANSWER:-A
Q17:- You have to rewind a motor whose operating temperature is about 130°C. Which insulating material would you select?
(A) Fibre
(B) Mica
(C) Cotton
(D) Paper immersed in oil
(E) Leatheroid paper
ANSWER:-B
Q18:- A moving iron ammeter reads 10 A. What is the peak current of the oscillation?
(A) 7.07 A
(B) 1.414 A
(C) 70.7 A
(D) 28.2 A
(E) 14.1 A
ANSWER:-B
Q19:- Thermal relays are often used in:
(A) Generator protection
(B) Generator protection
(C) Motor starters
(D) Both (A) and (B)
(E) None of these
ANSWER:-C
Q20:-. Power companies are interested in improving the power factor to _______.
(A) Reduce the line current
(B) Increase the motor efficiency
(C) Increase the volt-amperes
(D) Decrease the power
(E) Increase the power
ANSWER:-A
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