1. Load factor is defined as the ratio of _________.
(A) Connected load / Max. Demand.
(B) Average Demand / Max. Demand.
(C) Average Demand / Connected load.
(D) Max. Demand / Average Demand.
(A) Connected load / Max. Demand.
(B) Average Demand / Max. Demand.
(C) Average Demand / Connected load.
(D) Max. Demand / Average Demand.
Answer: (B) Average Demand / Max. Demand.
2. The speed of an induction motor__________.
(A) Decreases too much with the increase of load.
(B) Increases with the increase of load.
(C) Remains constant with the increase of load.
(D) Decreases slightly with the increase of load.
Answer: (D) Decreases slightly with the increase of load.
3. The frequency of the secondary voltage of a transformer will be_________.
(A) higer than the frequency of the primary voltage.
(B) Lesser than the frequency of the primary voltage.
(C) Equal to the primary voltage.
(D) Not Equal to the Frequency of the primary voltage.
Answer: (C) Equal to the primary voltage.
4. When a low resistance is connected in parallel with a high resistance, the combined resistance is
(A) Between the high resistance & low resistance.
(B) Depending on the value of high resistance.
(C) Always more than the high resistance.
Answer: (D) Always less than the low resistance.
5. A DC series motor is best suited for driving
(A) Motor Cars
(B) Machine tools.
(C) Engine Pump
(D) Cranes and hoists.
Answer: (D) Cranes and hoists.
6. In a DC series motor increase in load current results in
(A) Burning of the coil
(B) Increase in speed
(C) Damage to DC
(D) Decrease in speed
Answer: (D) Decrease in speed
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