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Electrical Engineering Quiz 18

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Electrical Engineering Quiz 18

1 / 50

Which type of load is offered by cranes and hoists ?

2 / 50

The knowledge of diversity factor helps in determining__________?

3 / 50

If 2% of the main current is to be passed through a galvanometer of resistance G, then resistance of the shunt required is ________________?

4 / 50

Which quantity consists of a unit 1KWh ?

5 / 50

The two conductors of a transmission line carry equal current I in opposite directions. The force on each conductor is________________?

6 / 50

An amplifier using an opamp with slew rate SR=1v/?sec has a gain of 40db.if this amplifier has to faithfully amplify sinusoidal signals from dc to 20 KHz without introducing any slew-rate induced distortion, then the input signal level must not exceed________?

7 / 50

The main disadvantage of the Ward-Leonard control method is______________?

8 / 50

The inverse of capacitance is called_______________?

9 / 50

Dielectric strength of a material depends on_____________?

10 / 50

LISN is a device used to measure conducted emissions. LISN stands for_____________?

11 / 50

An electric current induced within the body of a conductor when that conductor either moves through a non uniform magnetic field or in a region where there is a change in magnetic flux is called_____________?

12 / 50

Which D.C. motor is preferred for elevators ?

13 / 50

If current in a conductor increases then according to Lenz?s law self-induced voltage will____________?

14 / 50

For the protection of power station buildings against direct strokes the requirements are___________?

15 / 50

Which of the following is essentially needed while selecting a motor ?

16 / 50

The noise produced by a ___________ cooled machine is less as the rotor moves in a medium of smaller density?

17 / 50

When the motor is at its maximum speed then back emf will be______________?

18 / 50

When the excitation of an unloaded salient pole synchronous motor suddenly gets disconnected______________?

19 / 50

A.C. servomotor resembles_____________?

20 / 50

The maximum efficiency of a distribution transformer is____________?

21 / 50

In a square ? wave operation of 3 phase CSIs, the power values are on for___________?

22 / 50

If the doping level is increased, the breakdown voltage of the Zener_______________?

23 / 50

Which of the following in an application of D.C. motors?

24 / 50

The time taken by the machine to attain 0.632 of its final steady temperature rise is called_____________?

25 / 50

The noise factor of an ideal amplifier expressed in db is_____________?

26 / 50

If a transformer is continuously operated the maximum temperature rise will occur in_______________?

27 / 50

is an element used in semiconductors whose atoms have three valence electrons?

28 / 50

Curtis turbine is_____________?

29 / 50

The series and parallel resonance on L-C circuit? differs in that_________?

30 / 50

For which of the following parameter variation, the capacitance of the capacitor remains unaffected ____________?

31 / 50

Power plant having maximum demand more than the installed rated capacity will have utilization factor?

32 / 50

In self cooled motors the cooling time constant is about ___________ than the heating time constant because cooling conditions are worse at standstill?

33 / 50

In a synchronous motor, the breakdown torque is__________?

34 / 50

Two plates of a parallel plate capacitor after being charged from a constant voltage source are separated apart by means of insulated handles, then the____________?

35 / 50

If load (or torque) angle of a 4-pole synchronous motor is 6? electrical, its value in mechanical degrees is__________?

36 / 50

Carbon resistors are used extensively because they are____________?

37 / 50

A differential amplifier has a differential gain of 20,000 . CMRR=80 d The common mode gain is given by________?

38 / 50

Form Factor is the ratio of__________?

39 / 50

__________________ has relatively wider range of speed control?

40 / 50

When two batteries are connected in parallel, it should be ensured that___________?

41 / 50

A Transformer transforms____________?

42 / 50

The operating voltage of supertension cables is up to_________________?

43 / 50

The superposition theorem is applicable to____________?

44 / 50

A CRO is used to measure _________________?

45 / 50

What will be the phase angle between two alternating waves of equal frequency, when one wave attains maximum value the other is at zero value________ ?

46 / 50

Bucket elevators are used for___________?

47 / 50

Modulation is done in____________________

48 / 50

Selenium becomes a conductor in light so it behaves like____________?

49 / 50

If the full-scale deflection current of a multimeter is 50 ?A, its sensitivity is ________________?

50 / 50

The dimensions of hie parameter are _______________?

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