NEA LokSewa Test/quiz Question set - 8 || Model question set 8

This is a sample question set which is provided you to test your knowledge which is very useful for jobs like Electrician, Foreman, Supervisor, Assistant Engineer, & Engineer.

Model question set 8

Multiple Choice Question

1. Area under load curve gives
average demand
energy consumed
maximum demand
none
2. The stator of a 3-phase induction motor produces _____ magnetic field.
steady
rotating
alternating
None
3. The torque characteristics of a 3-phase induction motor is similar to that of ____.
DC series motor
DC shunt motor
DC differentially compounded motor
DC cumulatively compounded motor
4. A transformer will work on ____.
AC only
DC only
AC as well as DC
None
5. A dynamometer instrument is chiefly used as a
DC ammeter
DC voltmeter
wattmeter
None
6. The yoke of a DC machine is made of
silicon steel
soft iron
aluminium
cast steel
7. Most of single phase induction motors are ____ machines.
2-pole
6-pole
8-pole
4-pole
8. The stator of an alternator rarely uses ___ slots.
wide open type
semi-closed type
closed type
none
9. The air-gap in an alternator is ____ in an induction machine.
much shorter than
much longer than
about same
none
10. Corona is effected by
condition of atmosphere
size and spacing of conductor
line voltage
all of the above
11. The bulk power consumers are supplied at
66 KV
11 KV
230 KV
33 KV
12. Buchholz relay in oil immersed transformer provides protection against
insulation failure of windings
core heating
fall of oil level
all of the above
13. The earthing screen provides protection against
indirect lighting strokes
short-circuits
direct lighting strokes
none
14. A zenor diode has
one pn junction
two pn junction
three pn junction
none
15. The varactor is usually
forward biased
reverse biased
unbiased
in the breakdown region

Answer sheet for all questions

1. Area under load curve gives
energy consumed
2. The stator of a 3-phase induction motor produces _____ magnetic field.
rotating
3. The torque characteristics of a 3-phase induction motor is similar to that of ____.
DC shunt motor
4. A transformer will work on ____.
AC only
5. A dynamometer instrument is chiefly used as a
wattmeter
6. The yoke of a DC machine is made of
cast steel
7. Most of single phase induction motors are ____ machines.
4-pole
8. The stator of an alternator rarely uses ___ slots.
closed type
9. The air-gap in an alternator is ____ in an induction machine.
much longer than
10. Corona is effected by
all of the above
11. The bulk power consumers are supplied at
11 KV
12. Buchholz relay in oil immersed transformer provides protection against
all of the above
13. The earthing screen provides protection against
direct lighting strokes
14. A zener diode has
one pn junction
15. The varactor is usually
forward biased