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Electrical Engineering Quiz 69

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Electrical Engineering Quiz 69

1 / 50

Internal resistance of a cell is reduced by__________?

2 / 50

Lead-acid cell has a life of nearly charges and discharges______________?

3 / 50

Negative feedback is employed in __________________?

4 / 50

For handling greater currents induction wattmeters are used in conjunction with______________?

5 / 50

According to application, instruments are classified as_____________?

6 / 50

The apparent power drawn by an A.C. circuit is 10 kVA and active power is 8 kW. The reactive power in the circuit is_________?

7 / 50

____________is a part of the human temperature control system?

8 / 50

Following power plant has instant starting?

9 / 50

Which of the following should be done to make an unstable system stable ?

10 / 50

The unit of capacitance is__________?

11 / 50

Overhead lines for power supply to tramcars are at a minimum height of______________?

12 / 50

A semiconductor has generally_______________valence electrons?

13 / 50

Power for lighting in passanger coach, in a long distance electric train, is provided_________________?

14 / 50

It is desirable to operate the arc furnaces at power factor of_____________?

15 / 50

For transmission of power over a distance of 500 km, the transmission voltage should be in the range?

16 / 50

An SCR is turned off by _________________?

17 / 50

The ripple factor of a half-wave rectifier is_________________?

18 / 50

In parallel resonance, there is _______________?

19 / 50

The vafcie of transformation ratio of an induction motor can be found by__________?

20 / 50

A synchronous motor can be started by________?

21 / 50

There are ______________ h parameters of a transistor?

22 / 50

The injected e.m.f. in the rotor of induction motor must have__________?

23 / 50

Which of the following is expected to have the maximum permeability ?

24 / 50

In a synchronous motor running with fixed excitation, when the load is increased three times, its torque angle becomes approximately

25 / 50

In a charged capacitor the energy resides in________________?

26 / 50

Open circuited armature coil of a D.C. machine is________________?

27 / 50

In all base driver amplifiers__________?

28 / 50

In a pnp transistor, the current carriers are______________?

29 / 50

The amount of air which is supplied for complete combustion is called___________?

30 / 50

In an actual transformer the iron loss remains practically constant from no load to full load because:____________?

31 / 50

The forbidden gap in an insulator is________________?

32 / 50

The leakage flux in a transformer depends upon______________?

33 / 50

Lagging of changes in the magnetization of a substance behind changes in the magnetic field as the magnetic field is varied is known as magnetic_____________?

34 / 50

In the above circuit the current ix is___________?

35 / 50

A string of n parallel SCRs is operated at 72 KA, the rating of each SCR is 1 K If derating factor of the string is 0.1. value of n will be___________?

36 / 50

A controller, essentially, is a________________?

37 / 50

The most popular form of IC package is _____________?

38 / 50

Disc windings are primarily used in_____________-?

39 / 50

When current feedback (negative) is applied to an amplifier, its output impedance ________________?

40 / 50

The insulation on a current carrying conductor is provided__________?

41 / 50

A 30 V Zener will have depletion layer width_______________ that of 10 V Zener?

42 / 50

The underground system cannot be operated above_________________?

43 / 50

A trivalent impurity has______________valence electrons?

44 / 50

The direction of rotation of an hysteresis motor is determined by____________?

45 / 50

In the above question, what is the power in sidebands ?

46 / 50

Pure inductive circuit takes power from the A.C. line when_________?

47 / 50

Hard steel is suitable for making permanent magnets because_____________?

48 / 50

Which of the following is an essential part of a motor meter ?

49 / 50

An amplifier using an opamp with slew rate SR=1v/sec has a gain of 40db.If this amplifier has to faithfully amplify sinusoidal signals from dc to 20KHz without introducing any slew-rate induced distortion, then the input signal level exceed_____________?

50 / 50

The frame of an induction motor is usually made of____________?

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