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Electrical Engineering Quiz 15

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Electrical Engineering Quiz 15

1 / 50

When two D.C. series generators are running in parallel, an equilizer bar is used________________?

2 / 50

Commonly used conducting materials are_____________?

3 / 50

For a differentiating circuit to be effective, the RC product should be ___________ the time period of the input wave?

4 / 50

A zener diode is used as ______________?

5 / 50

A galvanometer in series with a high resistance is called_______________?

6 / 50

Four resistors of equal value are connected in parallel. If the total voltage is 15 V and the total resistance is 600 ?, the current through each parallel resistor is____________?

7 / 50

In a sine wave the slope is constant_______?

8 / 50

An RC snubber network used in BJT__________?

9 / 50

The type 2 system has __________ at the origin?

10 / 50

In Hopkinson demand rate or two part tariff the demand rate or fixed charges are__________?

11 / 50

Capacitors for power factor correction are rated in_________?

12 / 50

During charging the specific gravity of the electrolyte of a lead-acid battery

13 / 50

Which of the following bus-bar schemes has the lowest cost?

14 / 50

In an energy meter braking torque is produced to________________?

15 / 50

The critical resistance of the D.C. generator is the resistance of_____________?

16 / 50

A terminal where three on more branches meet is known as______________?

17 / 50

Synchronous motor always runs at______________?

18 / 50

Various adjustments in an energy meter include_______________?

19 / 50

Two coils have inductances of 8 mH and 18 mH and a co-efficient of coupling of 0.5. If the two coils are connected in series aiding, the total inductance will be______________?

20 / 50

Direct arc furnaces have which of the following power factors ?

21 / 50

The input stage of an Op-amp is usually a ________________?

22 / 50

Which of the following methods is used to start a synchronous motor?

23 / 50

Transformer utilization factor is a measure of the merit of a rectifier circuit. It is the ratio of_______________?

24 / 50

In a battery cover is placed over the element and sealed to the top of the battery container. This is done____________?

25 / 50

Which of the following methods is used to control speed of 25 kV, 50 Hz single phase traction ?

26 / 50

A series resistance is connected in the zener circuit to_______________?

27 / 50

________________ coupling is generally employed in power amplifiers?

28 / 50

relays are used for phase faults on long line?

29 / 50

The current gain of a BJT is__________?

30 / 50

The capacitors used in single-phase capacitor motors have no__________?

31 / 50

Which of the following amplifier circuit using junction transistor has the best gain?

32 / 50

Exciters of synchronous machines are______________?

33 / 50

A conductor 2 meters long moves at right angles to a magnetic field of flux density 1 tesla with a velocity of 12.5 m/s. The induced e.m.f. in the conductor will be____________?

34 / 50

Which of the following source of power is least reliable?

35 / 50

As compared to constant-current system, the constant-voltage system of charging a lead acid cell has the advantage of___________?

36 / 50

_________ locomotive has the highest operational availability?

37 / 50

The frequency of domestic power supply in Pakistan is_________?

38 / 50

In a transformer the energy is conveyed from primary to secondary_________?

39 / 50

A radio receiver has____________of amplification?

40 / 50

If the diversity factor of a power station is high then its generation cost is___________?

41 / 50

An open resistor, when checked with an ohm-meter reads_____________?

42 / 50

Laminated cores, in electrical machines, are used to reduce____________?

43 / 50

The common-mode voltage gain of a differential amplifier is equal to RC divided by _______________?

44 / 50

Delay time is defined by the interval when_______________?

45 / 50

Transmitted power remaining the same, if supply voltage of a D.C. 2-wire feeder is increased 100 percent, saving in copper is____________________?

46 / 50

Radiant heating is used for which of the following ?

47 / 50

If the terminals of armature of D.C. motor are interchanged, this action will offer following kind of braking?

48 / 50

After proper turn on of thyristor____________?

49 / 50

An electric filament bulb can be worked from____________?

50 / 50

The metal rectifiers are preferred to valve rectifiers due to which of the following advantages ?

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