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SSC JE 2019-20 Technical Quiz 86

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Question 1

In a shaded pole motor, shading coil is used to

Question 2

The meter constant of a single-phase 240 V induction watthour meter is 400 revolutions per kWh. The speed of the meter disc for a current of 10 A of 0.8 p.f. lagging will be

Question 3

A dynamometer type instrument can be used on

Question 4

Which of the following represents the relation between the line voltage and the phase voltage for the star connected load?

Question 5

The purpose of using dummy coil in D.C. machines is to

Question 6

A generating station supplies the following loads 15000 kW, 12000 kW, 8500 kW, 6000 kW and 450 kW. The station has maximum demand of 22000 kW. Calculate the diversity factor.

Question 7

For a 3-phase, 4-pole, 50 Hz synchronous motor the frequency, no. of poles, and the load torque are all halved. The motor speed will be

Question 8

The efficiency of a loo KVA transformer is 0.98 at full as well as half load. For this transformer at full load the copper loss

Question 9

How many units are supplied by a motor developing 2 HP (British) for 6 hours (Take 1 unit = 1 KWhr)?

Question 10

If copper loss of transformer at th full load is 4900 W, then its full load copper loss would be
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