NEA LokSewa Test/quiz Question set - 5 || Model question set 5

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Multiple Choice Question

Model question set 5

Each question has equal 1 mark.

1. Variable resistors are
wire wound resistors
thin film resistors
thick film resistors
all
2. A fuse always installed in a circuit is
series
parallel
either series or parallel
none
3. A terminal where more than two branches met is called:
node
terminal
loop
none
4. With double the number of turns by the same length and area, the inductance is
same
doubled
quartered
quadrupled
5. On what factors does the selection of turbine depend
head
speed
nature of load
all
6. Water hammer is developed in
draft tube
penstock
surge tank
turbine
7. In a DC machine, the greatest eddy current loss occurs in
yoke
armature
field poles
commutating poles
8. On what factor the speed of DC motor depends?
applied voltage
field flux
armature electric current
all
9. Which motor used in Lathe machine?
DC series motor
DC shunt motor
DC cumulative compound motor
none
10. A 3-phase 50 Hz induction motor runs at speed of 940 rpm with the slip of 6%, the speed of the rotating magnetic field will be
940 rpm
1000 rpm
1050 rpm
1100 rpm
11. The stator core of the induction motor is made of
laminated cast iron
mild steel
silicon steel stampings
soft wood
12. In a transformer operation, which quantity remains fixed
voltage
current
frequency
all
13. In a transformer, humming sound occurs due to
oil
insulation
magnetostriction
none
14. Power input to a transformer on no load at rated voltage comprises predominantly
copper loss
hysteresis loss
core loss
eddy current loss
15. Relay contacts are normally made up of:
silver contacts
copper contacts
aluminum contacts
lead contacts

Answer sheet for all questions

1. Variable resistors are
wire wound resistors
2. A fuse always installed in a circuit is
series
3. A terminal where more than two branches met is called:
node
4. With double the number of turns by the same length and area, the inductance is
quadrupled
5. On what factors does the selection of turbine depend
all
6. Water hammer is developed in
penstock
7. In a DC machine, the greatest eddy current loss occurs in
armature
8. On what factor the speed of DC motor depends?
all
9. Which motor used in Lathe machine?
DC shunt motor
10. A 3-phase 50 Hz induction motor runs at speed of 940 rpm with the slip of 6%, the speed of the rotating magnetic field will be
1000 rpm
11. The stator core of the induction motor is made of
silicon steel stampings
12. In a transformer operation, which quantity remains fixed
frequency
13. In a transformer, humming sound occurs due to
magnetostriction
14. Power input to a transformer on no load at rated voltage comprises predominantly
core loss
15. Relay contacts are normally made up of:
silver contacts