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Electrical Engineering Quiz 2

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Electrical Engineering Quiz 2

1 / 50

If the firing angle becomes negative, then the rectifier begins to work as_______________?

2 / 50

During the charging of a lead-acid cell__________?

3 / 50

In a capacitor, the electric charge is stored in_________?

4 / 50

A cumulatively compounded long shunt generator when operating as a motor would be____________?

5 / 50

The usual values of maximum flux densities for distribution transformers using hot rolled silicon steel are______________?

6 / 50

Series reactors should have________________?

7 / 50

In repulsion motor, maximum torque is developed when____________?

8 / 50

In a synchronous motor, damper windings are provided on____________?

9 / 50

In a 3-phase, 4-pole, 50 Hz synchronous motor, the frequency, pole number and load torque all are halved. The motor speed will be____________?

10 / 50

_____________is viscoelastic?

11 / 50

The magnetising current of a transformer is usually small because it has___________?

12 / 50

In a TRF radio receiver, the RF and detection stages are tuned to______________?

13 / 50

When the initial conditions of a system are specified to be zero it implies that the system is________________?

14 / 50

For high efficiency of transfer of power, internal resistance of the source should be____________?

15 / 50

Which of the following uses electric energy and does not convert it into any other form ?

16 / 50

Silicon controlled rectifier can be turned on____________?

17 / 50

The magneto-motive force is______________?

18 / 50

To protect most of the electrical equipment handling low power, the types of relays used are______________?

19 / 50

Over modulation results in ______________?

20 / 50

The forward voltage drop across a silicon diode is about _______________?

21 / 50

Two similar 15 V Zeners are connected in series. What is the regulated output voltage ?

22 / 50

In a radio receiver, we generally use ????.. oscillator as a local oscillator

23 / 50

The good power factor of an induction motor can be achieved if the average flux density in the air gap is___________?

24 / 50

The motor used for the compressors is____________?

25 / 50

The effect of considering friction in steam nozzles for the same pressure ratio leads to_________?

26 / 50

Which of the following is exhibited by Root locus diagrams ?

27 / 50

A Wien bridge oscillator uses___________feedback?

28 / 50

The only function of NOT gate is to__________________?

29 / 50

The capacitance of reversed bised junction J2 in a thyristor is CJ2 = 20 pF and can be assumed to be independant of the off state voltage. The limiting value of the charging current to turn on the thyristor is 16 m What is the critical value of dv/dt?

30 / 50

The working of a synchronous motor is similar to_____________?

31 / 50

The transformer ratings are usually expressed in terms of______________?

32 / 50

The process of heat transfer during the reentry of satellites and missiles, at very high speeds, into earth?s atmosphere is known as_______________?

33 / 50

The common-mode gain is ________________?

34 / 50

Edward?s air pump____________?

35 / 50

The torque of an induction motor is___________?

36 / 50

The value of the capacitance depends upon the________________?

37 / 50

In case of a double cage induction motor, the inner cage has__________?

38 / 50

The ability of charged bodies to exert force on 6ne another is attributed to the existence of____________?

39 / 50

When an input signal 1 is applied to a NOT gate, the output is ______________?

40 / 50

Thevenin resistance Rth is found

41 / 50

A dynamo converts______________?

42 / 50

The terminal voltage of a D.C. shunt generator drops on load because of all of the following reasons except:_____________?

43 / 50

MOSFET stands for______________?

44 / 50

If the value of a is 0.9, then value of ? is___________?

45 / 50

_____________is the reference input minus the primary feedback?

46 / 50

A Triac has three terminals viz ___________?

47 / 50

A power supply which has voltage regulation of ____________ is unregulated power supply?

48 / 50

In the d.c. equivalent circuit of a transistor amplifier, the capacitors are considered__________________?

49 / 50

In a npn transistor,_____________are the minority carriers?

50 / 50

The efficiency of a modern boiler using coal and heat recovery equipment is about_____________?

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