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L&T Placement Paper


Electrical Engineering

1. Convert 16 into binary form .

2. In Which gate o/p is 1 When all i/p are 1

3. What is moving coil ammeter reading, if supply is (10+15 sin 314 wt),

4. If voltmeter reads 100V,if we want to measure 150 What we have to do

5. Y-delta starter used in induction motor for..

6. In a balanced Y connection if VAN=400at 60,What is VBN ..

7. for unity TMS 10 sec, What about 0.5 TMS ans: 10 .

8. 400V,15 kW,4%slip,50 Hz, 4 pole What is the torque,

9. What are the factors influencing change in torque &speed

10. buccholtz relay is used for

11. lightening arrester is used for

12. What is the power dissipated in i=10+5 sin 314wt for 2ohm resistor

14. What should be the impedance value for 3-4j,for max power transfer

15. if current required for triggering thyristor at -30 degrees(temp) is 80 mA, What is the current required at 60 degrees.

16. What is thevenins resistance

17. Fourier series expansion like periodic signal ..

18. What is reactive power compensation

19. What is positive sequence currents some L-L-G fault occur on 3 " ph network Ia currentlike

20. 400v,50ohm resistor , inductive reactance 100ohm , circuit to be resonance ,find the voltage across capacitor

21. What is the ideal power loss for 1.1mH & 11.86 nF, length is negligible voltage

22. sync motor is used for

23. In Q factor Which resonance is usedans: series.

24. What is p.u. values

25. What is voltage bus parameters (3 ph networks)

26. What is the process of charging of capacitor

27. What is the reactive power compensation

28. What is the Poles location

29. I controller is used for ..steady state error reduction