APSPDCL A.E’S QUESTIONS HELD ON 10-07-2010(part-ii)

26. Xdot = X + U

Y = U

A. Controllable, observable.

B. Not Controllable, but observable

C. Controllable, Not observable

D. None

27. A system has 14 poles and 2 zeros its slope is--------------

A. -240 db/decade

B. 240 db/decade

C.both

d.none

28. Swamping resistance is used to--------------

A. Compensate the error due to temperature variations.

B.Compensate the error due to strong magnetic field.

C.Both A and B.

D.none.

29. PWR (pressurized water reactor) is a -------------- Reactor.

A. Ordinary water

B. Heavy water

C. --------------

D.none

30. Spower4 + 2*Spower3 + 3*Spower2 + 4*S + K = 0 for system to be

stable

A.K>0 and k<10

B. K>0 and k>10

C.K>0 and K<2

D.K>0 and K>2

31. Asynchronous input for J-K flip-flop is --------------

A.J

B.K

C.Clear

D.both A and B

32. Ripple factor for Half wave rectifier--------------

A.0.48

B.1.21

C.0.83

D.none

33. X3/X1 = ---------------

34. In 3-phase wattmeter one of the readings shows zero then cos ( ) ----

-----------

A.0.5

B. (sqrt3)/2

C.1

D.none

35. Given m=2mH L1=16mH L2=8mH Coefficient of coupling K=---------------

36. h21 represents---------------

A. Short circuit forward current gain

B.Open circuit forward voltage gain

C. Short circuit reverse current gain

D. Open circuit reverse voltage gain

37. Electrostatic voltmeters are used to measure---------------

38. Break away point lies between for the equation K(S+10)/ (S+2) (S+5)

39. The main consideration of feeder is ---------------

A. Current carrying capacity

B.Voltage drop

C.both

D.none

40. One shot multivibrator is --------------

A. monostable multivibrator

B.Astable multivibrator

C.Bistable multivibrator

D.none

41. A Problem on energy meter

42. A Problem on duty cycle

43. A problem on maximum power transfer

44. All day efficiency is ---------------

45.

A. Power flows from S.R.I.M to BRAKE REGULATOR

B. No power flows

C. ---------------

D. None

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