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Electrical Engineering Quiz 60

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Electrical Engineering Quiz 60

1 / 50

A fuse in a motor circuit provides protection against__________?

2 / 50

One volt is the same as___________?

3 / 50

he retentivity (a property) of material is useful for the construction of__________?

4 / 50

Which of the following is not a unit of inductance ?

5 / 50

The covalent bond is formed by_______________?

6 / 50

Which lightening stroke is most dangerous?

7 / 50

An SCR is made of_______________?

8 / 50

Large internal faults are protected by_______________?

9 / 50

In a single bus-bar system there will be complete shut down when____________?

10 / 50

A crystal diode is a ________________device?

11 / 50

If a D.C. shunt motor is working at full load and if shunt field circuit suddenly opens____________?

12 / 50

Which of the following methods is most accurate ?

13 / 50

An SCR can be used___________?

14 / 50

In a 3-phase power measurement by two wattmeter method the reading of one of the wattmeter was zero. The power factor of the load must be_______________?

15 / 50

Power transformers should be designed to have maximum efficiency________________?

16 / 50

In radio transmission, the medium of transmission is ________________?

17 / 50

The speed of a universal motor is generally reduced by using_________?

18 / 50

Which of the following generators will be preferred if they are required to be run in parallel?

19 / 50

In a mercury pool rectifier, the voltage drop across its electrodes___________?

20 / 50

Which of the following motors is usually preferred for kiln drives ?

21 / 50

When a transistor is driven to saturation, ideally the output is _____________?

22 / 50

Load factor of a power station is generally___________?

23 / 50

In a split phase motor____________?

24 / 50

The e.m.f. generated in a D.C. generator is directly proportional to____________?

25 / 50

An amplidyne can give which of the following characteristics ?

26 / 50

The phase difference between the input and output voltages of a transistor connected in common collector arrangement is_____________?

27 / 50

In a universal motor, the most common cause of brush sparking is___________?

28 / 50

In which of the following device the generated emf and armature current are in the opposite directions?

29 / 50

When the 3-phase system is not grounded and if Single Line to Ground fault occurs, the voltage of the other two healthy phases will____________?

30 / 50

One telsa is equal to___________?

31 / 50

The second derivative input signals modify which of the following ?

32 / 50

Which of the following power plant has least efficiency_________?

33 / 50

The relative permeability of materials is not constant

34 / 50

In direct arc furnace, which of the following has high value ?

35 / 50

When a voltage of one volt is applied, a circuit allows one micro ampere current to flow through it. The conductance of the circuit is___________?

36 / 50

The ratio of mass of proton to that of electron is nearly_____________?

37 / 50

The spring material used in a spring control device should have the following property?

38 / 50

The ratio of exit pressure to inlet pressure for maximum mass flow rate per unit area of steam through a nozzle when steam is initially dry saturated is___________?

39 / 50

A differential amplifier is invariably used in the i/p stage of all OP-amps. This is done basically to provide the OP-amps with a very high_________?

40 / 50

signal will become zero when the feedback signal and reference signs are equal?

41 / 50

Protective relays are devices that detect abnormal conditions in electrical circuits by measuring_____________?

42 / 50

Carnot cycle comprises of_______?

43 / 50

In D.C. generators, current to the external circuit from armature is given through_____________?

44 / 50

At series resonance, the circuit offers____________ impedance?

45 / 50

The power dissipated in a pure capacitor is______________?

46 / 50

The output signal voltage and current of a power amplifier are 5V and 200 mA; the values being r.m.s. What is the power output ?

47 / 50

All definitions of power factor of a series R-L-C circuit are correct except__________?

48 / 50

The effective resistance of an iron-cored choke working on ordinary supply frequency is more than its true resistance because of____________?

49 / 50

When a large surge current of very short duration flows through a thyristor then which one of the following device will operate to protect the thyristor ___________?

50 / 50

The presence of an uncharged conductor near a charged one increases the__________?

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