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Electrical Engineering Quiz 51

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Electrical Engineering Quiz 51

1 / 50

The dielectric constant (relative permittivity) of glass is given by___________?

2 / 50

A capacitive load in voltage source inverters generates ________________?

3 / 50

A carrier based PWM technique in CSI is composed of____________?

4 / 50

Kirchhoff s law is applicable to____________?

5 / 50

A crowbar is a circuit which is used to protect a_____________?

6 / 50

The bedding on a cable consists of____________?

7 / 50

The use of negative feedback ________________?

8 / 50

A circuit is disconnected by isolators when____________?

9 / 50

The material used for fuse must have_____________?

10 / 50

Rankine cycle operating on low pressure limit of p1 an 1 high pressure limit of p2__________?

11 / 50

A hysteresis motor works on the principle of__________?

12 / 50

An isolator is installed_____________?

13 / 50

The following resistors are in parallel across a voltage source: 220? , 470? , and 560? . The resistor with the least current is______________?

14 / 50

A.C. series motor as compared to D.C. series motor has__________?

15 / 50

Synchronsizing power of a synchronous machine is_____________?

16 / 50

Which of the following material is not a semiconductor ?

17 / 50

The pressure at the furnace is minimum in case of___________?

18 / 50

In a control system the output of the controller is given to_____________?

19 / 50

The time constant and R-C circuit may also be defined as the time during which the charging current falls to ________ percent of its initial maximum value

20 / 50

Hysteresis loss in a transformer varies as CBmax = maximum flux density) ?

21 / 50

Ward-Leonard control is basically a____________?

22 / 50

In a D.C. generator in case the resistance of the field winding is increased, then output voltage will____________?

23 / 50

If the current in a capacitor leads the voltage by 80?, the loss angle of the capacitor is_________________?

24 / 50

Rotor of a motor is usually supported on ___________________ bearings?

25 / 50

In a 3 phase VSI SPWM to use a single carrier signal and preserve the features of PWM technique, the normalized carrier frequency should be____________?

26 / 50

The resistance of a few meters of wire conductor in closed electrical circuit is____________?

27 / 50

If the load on a DC shunt motor is increases, its speed is slightly reduced due to______________?

28 / 50

The impurity atoms is semiconductors_____________?

29 / 50

The stability factor of a collector feedback bias circuit is_______________ that of base resistor bias?

30 / 50

The fan put of a 7400 NAND gate is_______________?

31 / 50

A certain voltage divider consists of two 12 k? resistors in series. Which of the following load resistors will have the most effect on the output voltage?

32 / 50

The voltage gain of a transistor connected in common collector arrangement is____________?

33 / 50

The speed characteristics of an induction motor closely resemble the speedload characteristics of which of the following machines?

34 / 50

The output characteristics of a JFET closely resemble the output characteristics of a ___________ valve?

35 / 50

For measurement of inductance having high value, we should use______________?

36 / 50

________________is preferred for automatic drives?

37 / 50

Ground resistance should be designed such that_____________?

38 / 50

A perfect black body is one that_____________?

39 / 50

The converse of hardness is known as______________?

40 / 50

In induction motors, the length of air gap in kept as small as mechanically possible is order to have____________?

41 / 50

The increased load during summer months is due to____________?

42 / 50

In a CB amplifier the maximum efficiency could be____________?

43 / 50

The distributors for residential areas are______________?

44 / 50

Self-inductance of a long solenoid is______________?

45 / 50

The sum of all phase current in a star connected primary winding with no neutral connection is equal to___________?

46 / 50

Mostly, synchronous motors are of_____________?

47 / 50

Emitter follower is used for________________?

48 / 50

In any rotating machine that part which houses the conductors and in which e.m.f. induced is to be utilized is called____________?

49 / 50

__________ has a low relative permeability and is used principally in field frames when cost is of primary importance and extra weight is not objectionable?

50 / 50

If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes______________?

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