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Electrical Engineering Quiz 7

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Electrical Engineering Quiz 7

1 / 50

A shaded pole motor does not possess___________?

2 / 50

A negative clipper removes the ______________half-cycles of the input voltage?

3 / 50

Resistance of a material always decreases if___________?

4 / 50

Burden of a protective relay is the power______________?

5 / 50

For frequencies above the resonant frequency, a parallel LC circuit behaves as a ____________ load?

6 / 50

60 thyrsistors are connected in series and parallel to form a 10 KV and 5.5 KA switch. Each thyristor is rated for 1.2 KV, 1 K The no. of parallel path are 6. The efficiency of the switch is______________________?

7 / 50

To measure and voltage by using an A.C. potentiometer, it is desirable that the supply for the potentiometer in taken_______________?

8 / 50

The active materials on the positive and negative plates of a fully charged lead-acid battery are_______?

9 / 50

The resistance of armature winding depends on

10 / 50

Thermocouples are mainly used for the measurement of_____________?

11 / 50

Two generators are running in parallel. One of the generators may run as motor for which of the following reasons ?

12 / 50

For an Op-amp with negative feedback, the output is_________________?

13 / 50

In the cables, the location of fault is usually found out by comparing____________?

14 / 50

If a self excited D.C. generator after being installed, fails to build up on its first trial run, the first thing to do is to______________?

15 / 50

An ohmmeter is a____________?

16 / 50

Armature reaction of an unsaturated D.C. machine is_____________?

17 / 50

Air-core coils are practically free from______________?

18 / 50

When two D.C. series motors are connected in parallel, the resultant speed is____________?

19 / 50

The positive clipper is that which removes the ____________half-cycles of the input voltage?

20 / 50

Non-linear resistors______________?

21 / 50

Charging a sulphated battery at high rate results in___________?

22 / 50

On which of the following effects of electric current a fuse operates ?

23 / 50

The power factor at resonance in R-L- C parallel circuit is________?

24 / 50

For heating element high resistivity material is chosen to______________?

25 / 50

The doping level in a zener diode is______________ that of a crystal diode?

26 / 50

If a shunt motor is started with its field winding open then___________?

27 / 50

In a synchronous motor, the magnitude of stator back e.m.f. Eb depends on___________?

28 / 50

DIAC and TRIAC both are semiconductors devices and conduct in____________________?

29 / 50

The heat dissipating capability of transformers of ratings higher than 30 kVA in increased by providing which of the following ?

30 / 50

An IC has _______________size?

31 / 50

Aluminium when adopted as a conductor material in __________ transformers, decreases the overall cost of the transformer?

32 / 50

The main source of production of biogas is__________________?

33 / 50

D.C. servomotors are used in______________?

34 / 50

A Zener diode is used as a _____________voltage regulating device?

35 / 50

is that property of a capacitor which delays any change of voltage across it ?

36 / 50

In a crystal, an atom vibrates at a frequency determined by_______________?

37 / 50

The electrostatic stress in underground cables is_________?

38 / 50

In a mercury arc rectifier________ flow from anode to cathode

39 / 50

Which of the following generating station has minimum running cost ?

40 / 50

The thickness of the layer of insulation on the conductor, in cables, depends upon___________?

41 / 50

If R2 is the resistance of secondary winding of the transformer and K is the transformation ratio then the equivalent secondary resistance referred to primary will be___________?

42 / 50

Practical way of obtaining static voltage equalization in series connected SCRs is by the use of____________?

43 / 50

________________ motor is a constant speed motor?

44 / 50

For power output higher than 15 kW, the suitable rectifier is________________?

45 / 50

In induction heating ___________ is abnormally high?

46 / 50

Pressure cables are generally not used beyond__________?

47 / 50

Brushes of D.C. machines are made of_________?

48 / 50

In a power plant if the maximum demand on the plant is equal to the plant capacity, then

49 / 50

Transistor biasing is generally provided by a_______________?

50 / 50

Varistors are______________?

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