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Electrical Engineering Quiz 39

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Electrical Engineering Quiz 39

1 / 50

The travelling speed of cranes varies from_________________?

2 / 50

Short-circuit currents are due to_______________?

3 / 50

A certain regulator has a no-load voltage of 6 V and a full-load output of 5.82 V. What is the load regulation ?

4 / 50

If voltage feedback (negative) is applied to an amplifier, its output impedance ______________?

5 / 50

An electric field can deflect_______________?

6 / 50

The impurity level in an extrinsic semiconductor is about_______________of pure semiconductor ?

7 / 50

A differential amplifier______________?

8 / 50

An astable multivibrator has ________________?

9 / 50

The piezoelectric effect in a crystal is___________?

10 / 50

Which type of winding is used in 3 phase shell-type transformer?

11 / 50

The susceptibility of paramagnetic materials generally lies between____________?

12 / 50

A thyristor equivalent of a thyratron tube is a _________?

13 / 50

Which of the following braking systems on the locomotives is costly ?

14 / 50

Spread time is defined as the interval during which_____________?

15 / 50

Energy stored in a magnetic field is given by______________?

16 / 50

Economiser is used to heat_____________?

17 / 50

In a D.C. generator in order to reduce sparking at brushes, the self-induced e.m.f. in the coil is neutralised by all of the following except______________?

18 / 50

Self inductance of a coil depends upon________________?

19 / 50

A consumer has to pay lesser fixed charges in____________?

20 / 50

Most of the digital computers do not have floating point hardware because_____________?

21 / 50

The binary code of (21.125)10 is_______________?

22 / 50

In the normal operation of an SCR, anode is __________ w.r.t. cathode?

23 / 50

The element that has the biggest size in a transistor is____________?

24 / 50

Which of the following is the basic consideration in the design of insulation ?

25 / 50

Locomotives with monometer bogies have_________________?

26 / 50

A device able to supply electrical energy is a __________?

27 / 50

Five 2 V cells are connected in parallel. The output voltage is__________?

28 / 50

The peak value of a sine wave is 200 V. Its average value is___________?

29 / 50

Which of the following expression is correct for electric field strength___________?

30 / 50

The operating point is also called the _______________?

31 / 50

Which of the following statement is true __________?

32 / 50

Anode current in an SCR consists of____________?

33 / 50

Rise time is defined by the interval when____________?

34 / 50

The relative permeability of a ferromagnetic material is_____________?

35 / 50

The average charging voltage for alkali cell is about__________?

36 / 50

The function of shunt in an ammeter is to______________?

37 / 50

The scale of a rectifier instrument is_________________?

38 / 50

When a transistor is cut off _________________?

39 / 50

A single-phase induction motor is__________?

40 / 50

Which of the following devices may be used to provide protection against lightening over voltages?

41 / 50

Owing to skin effect:

42 / 50

If the input a.c. voltage to regulated or ordinary power supply increases by 5% what will be the approximate change in d.c. output voltage?

43 / 50

Temporary magnets are used in______________?

44 / 50

The characteristics of drive for crane hoisting and lowering are which of the following ?

45 / 50

A capacitor stores 0.24 coulombs at 10 volts. Its capacitance is_____________?

46 / 50

Class C amplifiers are used as ___________________?

47 / 50

A pure inductance connected across 250 V, 50 Hz supply consumes 100 W. This consumption can be attributed to_________?

48 / 50

Hysteresis loss and eddy current loss are used in____________?

49 / 50

The property of a material which opposes the creation of magnetic flux in it is known as_____________?

50 / 50

The biasing circuit has a stability factor of 50. If due to temperature change, ICBO changes by 1 ?A, then IC will change by___________________?

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