1001. In squirrel cage induction motors, the rotor slots are usually given slight skew in order to__________?
A. reduce windage losses
B. reduce eddy currents
C. reduce accumulation of dirt and dust
D. reduce magnetic hum

1002. For turbo-alternators, the usual value of pole number is
A.6
B.16
C.24
D. none of these

1003. Under no-load condition power drawn by the prime mover of an alternator goes to
A. produce induced emf in armature winding
B. meet no-load losses
C. produce power in armature
D. meet Cu losses both in armature and rotor windings

1004. As load p.f. of an alternator becomes more leading, the value of generated voltage required to give rated terminal voltage
A. increases
B. remains unchanged
C. decreases
D. varies with rotor speed

1005. In an alternator running with a balanced zero p.f. lagging load, phase difference between the resultant armature (or stator) flux and main field flux is always.
A.1800
B. zero
C. 90? leading
D. 90? lagging

1006. At lagging loads, armature reaction in an alternator is
A. cross-magnetising
B. demagnetizing
C. non-effective
D. magnetizing

1007. Synchronous impedance method of finding voltage regulation of an alternator is called pessimistic method because
A. it was first suggested by Dr. Pessimist of Depression Island in Indian ocean.
B. armature reaction is wholly magnetizing
C. it is the simplest to perform, compute and comprehend
D. it given regulation value higher than is actually found by direct loading

1008. If chording angle for fundamental flux wave is a, its value for 5th harmonic is
A. 5 a
B. a/5
C. 25 a
D. a125

1009: Do conventional Current and electron current flow in the same direction is an eletric circuit ?

Ans: No, The direction of flow of electrons is opposite to that of conventional current .

1010. What is drift Current ?

Ans: The steady flow of electrons in one direction caused by the applied electric field constitutes electric current called the drift current.