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Power-Transformer
Transformer_Interview_Question
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QUIZ TEST
Welcome
You have to select only one out of 4
1. A sinusoidal voltage of frequency 1 Hz is applied to the field of d.c. generator. The armature voltage will be
1 Hz square wave
1 Hz sinusoidal voltage
d.c. voltage
none of the above
2. The function of the commutator in a d.c. machine is
to change alternating current to a direct current
to improve commutation
for easy control
to change alternating voltage to direct voltage
3. The starting torque of the three phase induction motor can be increased by
increasing the rotor reactance
increasing the rotor resistance
increasing the stator resistance
none of the above
4. In the induction motor the torque is
proportional to slip
inversely proportional to slip
proportional to the square of the slip
none of the above
5. The single phase induction motor (capacitor start capacitor run ) basically is
single phase motor
two phase motor
a.c series motor
none of the above
6. For the equal output the total current is more in
wave winding
lap winding
simplex lap winding
none of the above
7. The emf induced in a coil due to relative motion of a magnet is independent of
Coil resistance
Magnet not visible
Number of coil turns
Pole strength of the magnet
8. When a single turn coil rotates in a uniform magnetic field, at uniform speed the induced emf will be
Alternating
Steady
Pulsating
None of these
9. Principle of dynamically induced e.m.f is used in a
Choke
Transformer
Generator
Thermo-couple
10. The direction of dynamically induced e.m.f in a conductor can be determined by
Fleming’s left-hand rule
Fleming’s right-hand rule
Helix rule
Corkscrew rule