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Electrical Engineering Quiz 8

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Electrical Engineering Quiz 8

1 / 50

The efficiency of chimney is approximately______________?

2 / 50

The above statement is associated with

3 / 50

n a phase controlled 3 phase ac voltage controller, the harmonic present is__________?

4 / 50

For intermittent work which of the following furnaces is suitable ?

5 / 50

If load resistance in the above question (Q.49) is removed, the output voltage will_____________?

6 / 50

Capacitance increases with_____________?

7 / 50

The time constant of an R-C circuit is defined as the time during which capacitor charging voltage actually rises to _________ percent of its value

8 / 50

A squirrel cage induction motor is not selected when___________?

9 / 50

The property of coil by which a counter e.m.f. is induced in it when the current through the coil changes is known as__________?

10 / 50

A certain common-source JFET has a voltage gain of 10. If the source bypass capacitor is removed, ______________?

11 / 50

As a result of introduction of negative feedback which of the following will not decrease ?

12 / 50

If a power cable and a communication cable are to run parallel the minimum distance between the two, to avoid interference, should be______________?

13 / 50

Which of the following is an advantage of static capacitor for power factor improvement?

14 / 50

An ideal regulated power supply is one which has voltage regulation of________________?

15 / 50

The laminations of the armature of a D.C. machine are usually ___________ thick?

16 / 50

In a shaded pole motor, the shading coil usually consist of___________?

17 / 50

The angle between the rotating stator flux and rotor poles is called _________ angle.

18 / 50

Sparking at the commutator of a D.C. motor may result in____________?

19 / 50

A gas turbine basically work on

20 / 50

If the maximum collector current due to signal alone is 3 mA, then zero signal collector current should be at least equal to___________________?

21 / 50

The degree of mechanical vibrations produced by the laminations of a transformer depends on____________?

22 / 50

The unit of retentivity is____________?

23 / 50

If the sheet of a bakelite is inserted between the plates of an air capacitor, the capacitance will__________?

24 / 50

When the load resistance equals the generator resistance which of the following will be maximum __________?

25 / 50

Transistor biasing represents ______________ conditions?

26 / 50

If three 15 uF capacitors are connected in series, the net capacitance is

27 / 50

RC coupling is not used to amplify extremely low frequencies because____________?

28 / 50

After the starting winding of a single phase induction motor is disconnected from supply, it continues to run only on ______________?

29 / 50

In Colpitt?s oscillator, feedback is obtained___________?

30 / 50

The phase angle of gate signal in TRIAC can be shifted by using_____________?

31 / 50

Which of the following statements is correct for a system with gain margin close to unity or a phase margin close to zero ?

32 / 50

In a Weston synchronoscope, the fixed coils are connected across_______________?

33 / 50

Two transformers are connected in parallel. These transformers do not have equal percentage impedance. This is likely to result in____________?

34 / 50

Most of the majority carriers from the emitter____________?

35 / 50

By looking at which part of the motor, it can be easily confirmed that a particular motor is D.C. motor?

36 / 50

Which of the following statements regarding reluctance-start motor is incorrect ?

37 / 50

Life of the Edison cell is at least_____________?

38 / 50

The voltage drop for which of the following types of brush can be expected to be least ?

39 / 50

The current zero interruption, in oil and air blast circuit breakers, is achieved by____________?

40 / 50

When a step-input is given to an op-amp integrator, the output will be______________?

41 / 50

In order to remove static electricity from machinery___________?

42 / 50

Which of the following are integrating instruments ?

43 / 50

When a wave propagates on a transmission line, it suffers reflection several times at_____________?

44 / 50

310 km line is considered as_______________?

45 / 50

A certain amount of current flows through a ring-shaped coil with fixed number of turns. How does the magnetic induction B varies inside the coil if an iron core is threaded into coil without dimensional change of coil ?

46 / 50

In a rotary converter armature currents are______________?

47 / 50

In an AC. circuit, a low value of kVAR compared with kW indicates_________?

48 / 50

In open loop system_____________?

49 / 50

Current produced by moving the loop of wire across a magnetic field is called_____________?

50 / 50

Yokes with rectangular cross-section are used for_______________?

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