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Electrical Engineering Quiz 3

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Electrical Engineering Quiz 3

1 / 50

Copper oxide rectifier is usually designed not to operate above___________?

2 / 50

A single phase one pulse controlled circuit has a resistance R and counter emf E load 400 sin(314 t) as the source voltage. For a load counter emf of 200 V, the range of firing angle control is _____?

3 / 50

In case of a steam engine an average coal consumption per km is nearly________________?

4 / 50

The cost of an induction motor will increase as________________?

5 / 50

The value of VBE ___________________?

6 / 50

The substances which combine together to store electrical energy during the charge are called ________ materials

7 / 50

At parallel resonance, the net reactive component circuit current is _______________?

8 / 50

Annual depreciation cost is calculated by___________?

9 / 50

Which of the following problem arises in D.C. motors which are fed from thyristor bridge circuits ?

10 / 50

The alternating current has frequency of 106 Hz in such a way that time period for completion of cycle is_______________?

11 / 50

In a three-phase mercury arc rectifiers each anode conducts for____________?

12 / 50

One maxwell is equal to____________?

13 / 50

The maximum efficiency of transformer coupled class A power amplifier is _______________?

14 / 50

In a boiler installation the natural draught is produced_____________?

15 / 50

The starting torque in case of centrifugal pumps is generally_________________?

16 / 50

In three-phase squirrel-cage induction motors____________?

17 / 50

By which of the following methods the temperature rise of windings and other parts may be determined ?

18 / 50

For the safety of a steam boiler the number of safety valves fitted are____________?

19 / 50

A voltmeter should have ____________resistance?

20 / 50

When secondary of a current transformer is open-circuited its iron core will be__________?

21 / 50

Which of the following primary cells has the lowest voltage_________ ?

22 / 50

The armature of D.C. generator is laminated to_______________?

23 / 50

Annual depreciation as per straight line method, is calculated by__________?

24 / 50

A feeder, in a transmission system, feeds power to________________?

25 / 50

Power amplifiers handle ______________ signals compare to voltage amplifiers?

26 / 50

Maximum demand on a power plant is_________________?

27 / 50

Admittance relay is __________ relay?

28 / 50

Primary air is that air which is used to_____________?

29 / 50

In superhetrodyne receiver, the input at mixer stage is________________?

30 / 50

An induction motor is identical to_________?

31 / 50

The force between two long parallel conductors is inversely proportional to_____________?

32 / 50

The direction of electric field due +0 positive charge is ___________?

33 / 50

Static capacitors are rated in terms of_____________?

34 / 50

The ratio of reverse resistance and forward resistance of a germanium crystal diode is about ______________?

35 / 50

Which instrument is used to measure the power of electric circuit ?

36 / 50

During reverse recovery time__________________?

37 / 50

An amplifier receives 0.1 W of input signal and delivers 15 W of signal power. What is the power gain in db?

38 / 50

The purpose of capacitors in a transistor amplifier is to___________________?

39 / 50

If free space between the plates of a capacitor is replaced by a dielectric_____________?

40 / 50

With the increase in temperature, the speed of DC shunt motor____________?

41 / 50

Following will happen if the specific gravity of electrolyte becomes more than 1.23

42 / 50

The voltage gain in a transistor connected in___________arrangement is the highest?

43 / 50

In Thevenin?s theorem, to find Z

44 / 50

Automatic signalling is used for which of the following trains ?

45 / 50

The thickness of metallic shielding on cables is usually_______________?

46 / 50

Load factor of a power station is defined as____________?

47 / 50

A forward biased pn junction diode has a resistance of the order of_____________?

48 / 50

The efficiency of a machine should be as ____________ as possible to reduce the operating cost?

49 / 50

If the supply frequency to the transformer is increased,?the iron loss will__________?

50 / 50

A crystal diode utilises ?????.. characteristic for rectification

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