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ISRO EE Quiz 4

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Question 1

A 90 MW, 11 kV generator has an inertia constant H = 3s. The stored energy in the rotor at synchronous speed is

Question 2

Inductive load of resistance 20 Ω and inductance 0.1 H is connected in series and switched on to an AC voltage of V = 100 sin(200 t + α). Find the angle such that there is no transients?

Question 3

In 8085 microprocessors, which signal is used to insert wait?

Question 4

What is the dynamic Impedance offered by Ideal tank circuit in a network?

Question 5

A 4 kVA, 400 V/200 V single phase transformer has resistance of 0.02 p.u and reactance of 0.06 p.u. The resistance and reactance referred to HV side are

Question 6

Two mechanically coupled alternators deliver power at 50 Hz and 60 Hz respectively. What is the highest speed of the alternators?

Question 7

Calculate ix in the circuit diagram given below:

Question 8

A 3 phase, 50 Hz synchronous generator is connected to an infinite bus. The maximum power that can be transferred to infinite bus is 1 p.u. The mechanical input to the generator is p.u. Inertia constant of the generator is 5s. Find the natural frequency of oscillation of the system?
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Mar 20ESE & GATE EE