NEA LokSewa Test/quiz Question set - 10 || Model question set 10

This is a sample questions that is provided to test your knowledge which can help you to get jobs like Electrician, Foreman, Supervisor, Assistant Engineer, & Engineer in NEA, NTC, PSC, CANN.

Model question set 10

Multiple Choice Question

1. In a 3-phase induction motor the rotor speed is ____ the synchronous speed.
greater than
smaller than
equal to
none
2. An induction motor is preferred to a DC motor because it
provides high starting torque
provides fine speed cpntrol
has simple and rugged construction
none
3. A transformer does not posses ___ changing property.
impedance
voltage
current
power
4. In a dynamometer type instrument damping is provided by
air friction
eddy currents
fluid friction
none
5. A 4-pole DC machine has ___ magnetic circuits.
2
8
4
none
6. A DC series motor is the most suitable for
cranes
pumps
lathes
punch presses
7. A single-phase induction motor employs ___ rotor.
squirrel cage
wound
either a or b
none
8. The synchronous reactance of an alternator is due to
leakage flux
DC field excitation
armature reaction
none
9. If span increase the sag will
decrease
increase
remain same
none
10. The distribution transformer is generally connected in
Delta/Star
Delta/Delta
Stat/Star
Star/Delta
11. The relay protection is not provided for overload in
generator
transformer
both a & b
none
12. The internal cause of overvoltage in a power system is
switching surges
insulation failure
arcing ground
all
13. A zenor diode used as
an amplifier
a rectifier
a voltage regulator
a multivibrator
14. The emitter of a transistor is ____ doped.
lightly
heavily
moderately
none
15. A mercury vapor lamp gives
pink light
yellow light
greenish blue light
white light

Answer sheet for all questions

1. In a 3-phase induction motor the rotor speed is ____ the synchronous speed.
smaller than
2. An induction motor is preferred to a DC motor because it
has simple and rugged construction
3. A transformer does not posses ___ changing property.
power
4. In a dynamometer type instrument damping is provided by
air friction
5. A 4-pole DC machine has ___ magnetic circuits.
4
6. A DC series motor is the most suitable for
cranes
7. A single-phase induction motor employs ___ rotor.
squirrel cage
8. The synchronous reactance of an alternator is due to
armature reaction
9. If span increase the sag will
increase
10. The distribution transformer is generally connected in
Delta/Star
11. The relay protection is not provided for overload in
generator
12. The internal cause of overvoltage in a power system is
all
13. A zenor diode used as
a voltage regulator
14. The emitter of a transistor is ____ doped.
heavily
15. A mercury vapor lamp gives
greenish blue light