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Electrical Engineering Quiz 62

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Electrical Engineering Quiz 62

1 / 50

Power factor of an electrical circuit is equal to____________?

2 / 50

Out of the following statements, concerning an electric field, which statement is not true ?

3 / 50

Overhead system can be designed for operation up to____________?

4 / 50

If RC and RL represent the collector resistance and load resistance respectively in a single stage transistor amplifier, then a.c. load is____________________?

5 / 50

In a D.C. machine the number of brush arms is _________ the number of poles?

6 / 50

D.C. machines designed with a large value of air gap length have_____________?

7 / 50

For crane travel which of the following motors is normally used ?

8 / 50

In a lead-acid cell dilute sulfuric acid (electrolyte) approximately comprises the following__________?

9 / 50

A metal rod of 25 cm length is moving at a speed of 0.5/sec in direction perpendicular to 0.25T magnetic field. Emf produced in the rod is_____________?

10 / 50

Diesel power plant are generally used as___________?

11 / 50

Air capacitors are generally available in the range_________?

12 / 50

The relative permittivity has the following units__________?

13 / 50

The voltage transformation ratio of a transformer is equal to the ratio of_______________?

14 / 50

The action of JFET in its equivalent circuit can best be represented as a_____________?

15 / 50

___________ will offer the least load.

16 / 50

The following currents are measured in the same direction in a three-branch parallel circuit: 200 mA, 340 mA, and 700 m

17 / 50

The Q of a tuned amplifier is 50. If the resonant frequency for the amplifier is 1000kHZ, then bandwidth is __________________?

18 / 50

The parallel combination of a 470 ? resistor and a 1.2 k? resistor is in series with the parallel combination of three 3 k? resistors. A 200 V source is connected across the circuit. The resistor with the most current has a value of____________?

19 / 50

A.C cannot be used for________________?

20 / 50

For which of the following materials the net magnetic moment should be zero ?

21 / 50

The shape of the torque/slip curve of induction motor is__________?

22 / 50

Power electronics essentially deals with control of a.c. power at____________?

23 / 50

Which of the following devices should be used for accurate measurement of low D.C. voltage ?

24 / 50

Power transformers are generally designed to have maximum efficiency around__________?

25 / 50

Which of the following amplifier is used in a digital to analog converter?

26 / 50

is usually used for brush rockers____________?

27 / 50

Low voltage at motor terminals is due to____________?

28 / 50

Which one of the following devices does not function like an electric motor ?

29 / 50

In obtaining the frequency response curve of an amplifier, the______________?

30 / 50

Self charge of a Ni-Fe cell is _______ Edison cell

31 / 50

Which among the following constitutes the major load for an automobile battery _________?

32 / 50

The number of passenger coaches that can be attached to a diesel engine locomotive on broad gauge is usually restricted to_____________/

33 / 50

For a voltage source:

34 / 50

In a transformer the resistance between its primary and secondary is____________?

35 / 50

The electromagnet has 50 turns and a current of 1A flows through the coil. If the length of the magnet circuit is 200 mm, what is the magnetic field strength ?

36 / 50

In a given transformer for given applied voltage, losses which remain constant irrespective of load changes are______________?

37 / 50

The zero signal IC is generally ______________ mA in the initial stages of a transistor amplifier?

38 / 50

For a motor-generator set which of the following motors will be preferred ?

39 / 50

A power MOSFET has three terminals called___________?

40 / 50

If a sinusoidal wave has frequency of 50 Hz with 30 A r.m.s. current which of the following equation represents this wave_________ ?

41 / 50

The power factor of a synchronous motor is better than that of induction motor because

42 / 50

Negative plate of an Edison cell is made of__________?

43 / 50

Generally grounding is provided for

44 / 50

Which feature, while selecting a.motor for centrifugal pump, will be of least significance ?

45 / 50

A.C can not be used for_______________?

46 / 50

transmission line has reflection coefficient as one?

47 / 50

Cells are connected in parallel to__________?

48 / 50

Pure inductive circuit____________?

49 / 50

In a transformer the tappings are generally provided on_____________?

50 / 50

Which of the following is a vector quantity ?

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