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Electrical Engineering Quiz 64

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Electrical Engineering Quiz 64

1 / 50

A pentavalent impurity has______________Valence electrons?

2 / 50

Which of the following circuit element stores energy in the electromagnetic field ?

3 / 50

A tuned amplifier is used in ___________ applications?

4 / 50

While testing a capacitor with ohm meter, if the capacitor shows charging, but the final resistance reading is appreciably less than normal, it can be concluded that the capacitor is____________?

5 / 50

The thickness of laminations used in a transformer is usually____________?

6 / 50

The overall efficiency of a steam power station is ________ its thermal efficiency.

7 / 50

Which of the following component is usually fabricated out of silicon steel ?

8 / 50

An ideal ammeter has ______________ resistance?

9 / 50

The power demand can be estimated approximately by___________?

10 / 50

Excessive formation of lead sulphate on the surface of the plates happens because of___________?

11 / 50

The duration of sudden snort-circuit test on a synchronous motor is usually about_____________?

12 / 50

The distance between the starts of two consecutive coils measured in terms of coil sides is called_____________?

13 / 50

A feedback circuit usually employs _________________ network?

14 / 50

The value of reheat factor normally varies from___________?

15 / 50

The isentropic expansion of steam through nozzle for the steam initially superheated at inlet is approximated by equation__________?

16 / 50

Which of the following application requires high starting torque ?

17 / 50

The minimum charge on any object cannot be less than_______________?

18 / 50

A Zener regulator _____________ in the power supply?

19 / 50

Moisture content in the soil __________ the earth soil resistance?

20 / 50

A rheostat differs from potentiometer in the respect that it_____________?

21 / 50

For which of the following applications a D.C. motor is preferred over an A.C. motor ?

22 / 50

D.C. generators are connected to the busbars or disconnected from them only under the floating condition________________?

23 / 50

Helical coils can be used on___________?

24 / 50

Rateau steam turbine is______________?

25 / 50

The cold rolled grain oriented steel has _________ permeability in the direction of the grain orientation?

26 / 50

In Rankine cycle the work output from the turbine is given by__________?

27 / 50

The four bulbs of 40 W each are connected in series swift a battery across them, which of the following statement is true_______________?

28 / 50

The gravity controlled instrument has crowded scale because current is proportional to________________?

29 / 50

For blowers which of the following motor is preferred ?

30 / 50

The ?crawling? in an induction motor is caused by___________?

31 / 50

In a five-branch parallel circuit, there are 12 mA of current in each branch. If one of the branches opens, the current in each of the other four branches is_______________?

32 / 50

Which of the following is the passive element?

33 / 50

For series connected SCR’s dynamic equalising circuit consists of___________?

34 / 50

The steel used in steel cored conductors is usually__________?

35 / 50

A good electric contact material should have all of the following properties except_____________?

36 / 50

The man made noise sources is / are_____________?

37 / 50

Three identical amplifiers with each one having a voltage gain of 50,input resistance of 1K? & output resistance of 250 ,are cascaded.The open circuit voltage gain of combined amplifier is_________?

38 / 50

When an a.c. signal is applied to an amplifier, ,the operating point moves along_________________?

39 / 50

Three lights are connected in parallel across a 120 volt source. If one light burns out_____________?

40 / 50

An SCR is a ____________ triggered device?

41 / 50

The primary reason for low power factor is supply system is due to installation of____________?

42 / 50

The Op-amp can amplify______________?

43 / 50

Which of the following rectifiers have been used extensively in supplying direct current for electroplating ?

44 / 50

In case of an inductance, current is proportional to___________?

45 / 50

The rating of a fuse wire is always expressed in________________?

46 / 50

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

47 / 50

A MOSFET uses the electric field of a _______________to control the channel current?

48 / 50

If the doping level of a crystal diode is increased, the breakdown voltage__________________?

49 / 50

If brushes of a D.C. generator are moved in order to bring these brushes in magnetic neutral axis, there will be________________?

50 / 50

In a transistor leakage current mainly depends on__________?

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