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Electrical Engineering Quiz 1

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Electrical Engineering Quiz 1

1 / 50

Regenerative cycle thermal efficiency_______________?

2 / 50

In case of a 4-pole D.C. generator provided with a two layer lap winding with sixteen coils, the pole pitch will be__________________?

3 / 50

A charge of 0.10C accelerated through a potential difference of 1000V acquires kinetic energy_______________?

4 / 50

The most costly coupling is _______________ coupling?

5 / 50

A _________ is used to measure the stator % winding temperature of the generator?

6 / 50

Direct conversion of heat into electrical energy is possible through____________?

7 / 50

The core used in high frequency transformer is usually___________?

8 / 50

Belted slip ring induction motor is almost invariably used for_________________?

9 / 50

In a phase-shift control method, the phase shift between anode and grid voltages can be achieved by means of______________?

10 / 50

Wave trap is used to trap waves of__________________?

11 / 50

The efficiency of diesel locomotives is nearly_______________?

12 / 50

Temperature co-efficient of resistance is expressed in terms of___________?

13 / 50

If/, R and t are the current, resistance and time respectively, then according to Joule?s law heat produced will be proportional to_______________?

14 / 50

The units of capacitance are____________?

15 / 50

Which of the following motors is inherently self starting ?

16 / 50

A series ohmmeter circuit uses a 3 V battery and a 1 mA meter movement. What is the half-scale resistance for this movement ?

17 / 50

An SCR combines the features of ____________?

18 / 50

Which of the following rectifiers are primarily used for charging of low voltage batteries from AC supply ?

19 / 50

Which of the following is the disadvantage of electric traction over other systems of traction ?

20 / 50

N/C =_____________?

21 / 50

Which of the following is the disadvantage of a synchronous condenser?

22 / 50

To achieve sparkless commutation brushes of a D.C. generator are rockedm ahead so as to bring them?

23 / 50

The value of ? for a transistor is generally____________?

24 / 50

In medium sized induction motors, the slip is generally around___________?

25 / 50

?The surface integral of the normal component of the electric displacement D over any closed surface equals the charge enclosed by the surface?. The above statement is associated with_______?

26 / 50

During the idle period of the battery, strong electrolyte tends to change the active material of the cell into____________?

27 / 50

Approximate estimation of power demand can be made by_____________?

28 / 50

There is a greater possibility of occurence of corona during______________?

29 / 50

Oil switches are employed for_____________?

30 / 50

In a transformer the resistance between its primary and secondary should be_____________?

31 / 50

The ratio of exit pressure to inlet pressure of maximum mass flow rate per area of steam through a nozzle when steam is initially superheated is__________?

32 / 50

Three capacitors each of the capacity C are given. The resultant capacity 2/3 C can be obtained by using them_____________?

33 / 50

For cost and safety, the outdoor substations are installed for voltages above_________________?

34 / 50

Harmonics in 3 phase inverters can be reduced by using___________?

35 / 50

International ohm is defined in terms of the resistance of________________?

36 / 50

A light bulb draws 300 mA when the voltage across it is 240 V. The resistance of the light bulb is___________?

37 / 50

Due to which of the following factors the brush wear rate is altered ?

38 / 50

In a parallel LC circuit, if the input signal frequency is increased above resonant frequency then _______________?

39 / 50

A closed switch has a resistance of_____________?

40 / 50

In a glass bulb mercury arc rectifier the maximum current rating is restricted to___________?

41 / 50

Number of PN junction in an SCR is____________?

42 / 50

Power transistor are type of___________?

43 / 50

At the base-emitter junctions of a transistor, one finds___________?

44 / 50

A rectifier with an external low pass filter is an example of______________?

45 / 50

The PIV rating of each diode in a bridge rectifier is ___________that of the equivalent center-tap rectifier?

46 / 50

Maximum power loss occurs during_________________?

47 / 50

The hot resistance of the bulb?s filament is higher than its cold resistance because the temperature co-efficient of the filament is___________________?

48 / 50

A synchronous motor can be made self starting by providing?

49 / 50

The first order control system, which is well designed, has a_______________?

50 / 50

A capacitor having capacitance of 5 uF is charged to a potential difference of 10,000 V. The energy stored in the capacitor is__________?

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