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# DFCCIL Executive Rapid Quiz 23

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Question 1

Bharat ratna is designed in shape of peepal leaf with inscription ‘BHARAT RATNA’ in______ script.

Question 2

The number of terms in an A.P. is even, the sum of odd terms is 63 and that of even terms is 72 and the last term exceeds the first term by 16.5. Find the number of terms:

Question 3

If in Fig.,

what will happen if resistance is shorted?

Question 4

A 208 V, 45 kVA, 0.8 p.f. leading, connected, 60 Hz synchronous motor has a synchronous reactance of and negligible armature resistance. Its friction and windage losses are 1.5 kW and its core losses are 1 kW. Initially, the shaft is supplying a 15 h.p. load and the motors p.f. is 0.8 leading. The electric power supplied to the motor is

Question 5

Assume that 10 A current deposits 10.8 g silver in 900 s. How much copper would be deposited by 9 A in 1200 s?

Question 6

A current amperes flows in the loop having circuit arc of radius meters subtending an angle θ radian as shown in below figure. The magnitude of magnetic field at the centre is

Question 7

The forbidden Input condition is present in

Question 8

A moving iron voltmeter draws current of 2 mA for full scale value of 200V. What will be the meter reading if it draws current of 0.5 mA –

Question 9

At parallel resonance, the circuit susceptance is

Question 10

A d.c. 2-wire system is to be converted into a.c. 3-phase, 3-wire system by the addition of a third conductor of the same cross-section as the two existing conductors. If the voltage between wires and the percentage loss in the line remain unchanged, what is the percentage power loss in the two-wire d.c. system? Assume that voltage been the lines is V and resistance of each conductor is R.
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