59.

61.

62.

63.

65.

In a DOL starter, a NVC is connected across a phase and neutral of a three phase, 415 v,
50 Hz supply and works normally. Then the rating of the NVC ought to be :

(A) 415V, 50 Hz AC (B) 400V, 50 Hz AC

(C) 240V, 50Hz AC (D) 200V, 50 Hz AC

The starting current of a 220V, 10 HP shunt motor having armature resistance of
0.2 ohm without starter is :

(4) 114. (0) 11004
(©) 110 ‰. (D) 110004
In a de generator, if the field circuit resistance is more than field critical resistance, then the :
(4) field coils will burn
(B) generator will build up max. voltage
(C) generator will generate up max. power
(D) generator will not build up voltage
Metric Horse Power is equal to :
(ക 746% (2೫) 786%
756 भ (D) 1000 भ
When remote ON and OFF are used, the remote ON button should be connected with the
existing ON button :
(A) inseries (B) in parallel
(C) in series and parallel (D) bridge circuit formation.
‘While running, the rotor frequency in a 3 phase induction motor is equal to :
(ಯಿ) stator frequency (B) stator frequency / slip
(¢) stator frequency * slip (D) stator frequency + slip

When a single phase supply is connected across single phase winding of motor, the nature of
magnetic field produced is :

(ಯ) constant in magnitude and direction

(B) alternating in nature

(C) constant in magnitude but rotating at synchronous speed

(D) pulsating in nature

When remote push buttons are used START push buttons are wired in வ தறம
STOP push buttons are wired in ———————— in a starter control circuit. -

(A) series, series (B) series, parallel

(C) parallel, series (D) parallel, parallel

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