# Placement Papers - HAL

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### HAL Technical Officer Interview Paper (Kolkata)

Posted By : Hyndavi Rating : +14, -3

14) In aptitude part see through series completion there was a 5-6 no of  that.

15) No aptitude questing like avg, %, proff-loss, prob, etc.

16) Sentence correction 2-3.

17) Why rotor of SCIM is skewed?

18) Magnetostriction increases-

19) Good transformer oil contains how much amount of water in ppm?

20) Lightning over voltage create how much volt?

21) K/s(s+1)(s+5) then find out the value of K so that system become  stable.

22) There was a question from definition of Nyquist criteria.

23) Standing done up to the frequency range of? (audio)

24) If a square waveform if given to the supply side of a 2wdg transformer  its o/p waveform will be-

25) SC test done on transformer because-

26) If a transformer is operating in .8 PF lag & at efficiency of .9, if  now P is .8 lead the efficiency will become.

27) Interpoles are connected for?

28) Dielectric strength of air-

29) A alternator is connected to a grid. Now its prime mover is go slow by  ½. Change in its exiting current to held in synchronism.

30) Is the strength of capacitor in LPF is increased the op voltage will-

31) The voltage of a generator and an infinite bus are given 0.92, 10 deg &  1.0, 0 deg resp. the generator acts as a "

32) A wave will not experience any reflection when impedance of line is  equal to- surge imp

33) Power transmitted is related to system voltage as-

34) Delay creator ckt name (multivibrator name actually)

35) In tachogenerator adjustment is done by-

36) Surge wave is attended by- (C,L,R)

37) there was 10 question related to measurement-

38) Read all electrostatic instrument related question from any competitive  exam book.

39) Lowest reading in moving iron meter is-

40) In galvanometer damping is provided by-

41) In electrodynamic meter a battery & a resistance is provide for-

42) Megger is used for-

43) A question like an ac is applied against a moving coil meter it will  reads-

44) Rectifier type instrument measureswhat value - (Rms)

45) Advantage of electrostatic instrument is-

46) Creeping occurs because-

47) Why 2 holes are drilled oppositely in disc of energy meter.

48) Energy meter is a _____ type equipment (recording)

49) There was a question related to selection of a voltmeter based on  accuracy-

50) Advantage of hay bridge over anderson bridge-

51) Inductance is measured by " (all the 3 bridge name) .

52) Potentiometer is which type of instrument-

53) Which type of motor is used in refrigerator?

54) Reflection coefficient based problem 1