ITI Instructor- Electrician Previous Questions

#1. How cross magnetising reaction of armature reaction in DC generator is neutralized by…?

introducing compensating winding

having interpole between main poles

shifting brush position from GNA to MNA

increasing ampere turn in field winding

#2. The starter used with a constant speed motor is….?

2 point starter

3 point starter

4 point starter

5 point starter

#3. In a DC generator lap winding is used for….?

high voltage and high current

low voltage and low current

high voltage and low current

low voltage and high current

#4. For small machines the yoke of dc machine is made up of….?

mild steel

cast steel

cast iron

rolled steel

#5. The commutator segments are insulated from each other by…?

PVC

bakelite

mica

rubber

#6. A capacitor start, capacitor run single phase induction motor is basically a ….?

AC series motor

DC series motor

2 phase induction motor

3 phase induction motor

#7. Single phase motors are commercially manufactured upto….?

1HP

2HP

5HP

10HP

#8. A squirrel cage IM is designed to run at 50Hz supply frequency, what happens when it is connected to 60Hz supply frequency?

it will burn

will not start

run at 5/6 of rated speed

run at 6/5 of rated speed

#9. Which of the following does not cause hunting in synchronous motor…?

variable frequency

variable load

variable supply voltage

windage friction

#10. Slip ring induction motor has….?

low starting torque

high starting torque

medium starting torque

zero torque

#11. Crawling in the induction motor is caused by….?

high loads

improper design

harmonics developed in the motor

low supply voltage

#12. The size of the conductor for cables depends upon….?

insulation

voltage

current

power

#13. Breaking capacity of circuit breaker is generally expressed in…..?

ampere

volts

MW

MVA

#14. The primary winding of a current transformer has…..?

large turns

few turns

no turns

intermediate turns

#15. Which type of insulators are used for 132 kV transmission line…?

pin type

shackle type

suspension type

pin or disk type

#16. The negative plate of lead acid cell is….?

zinc

lead

lead peroxide

copper

#17. The current transformer is used to measure….?

low current

high current

voltage

power

#18. In a thermal plant heat from the flue gas is recovered in…?

chimney

economiser

super heater

condenser

#19. For a sinusoidal ac voltage of peak value is 100 V, the rms value is…?

200 V

150 V

30 V

70.7 V

#20. Which of the following a low pass filter…?

L type with series C and shunt L

L type with series L and shunt C

T type with series C and shunt L

T type with series L and shunt C

#21. …. wiring used for temporary installations?

CTS

PVC

Cleat

Metal

#22. What is the full name of MCCB?

Metal case circuit breaker

Moulded case circuit breaker

Miniature case circuit breaker

Mobile case circuit breaker

#23. For high frequencies, capacitor act as …..?

short circuit

open circuit

rectifier

amplifier

#24. The energy of a charged capacitor besides in….?

electric field only

magnetic field only

both of above

none of the above

#25. A capacitor consists of…?

2 conductors

2 semi conductors

2 dielectrics

2 insulators