Electrical Engineering Quiz 59
1 / 50
Which of the following should be used for extinguishing electrical fires?
2 / 50
A transistor behaves as a linear device for _____________?
3 / 50
A 10 V power supply would use ____________ as filter capacitor?
4 / 50
In a three-phase induction motor__________?
5 / 50
In a D.C. generator:___________________?
6 / 50
Light duty cranes are used in which of the following ?
7 / 50
A cable carrying alternating current has__________?
8 / 50
In the case of an unsymmetrical alternating current the average value must always be taken over__________?
9 / 50
Which of the following, in a thermal power plant, is not a fixed cost?
10 / 50
The arc voltage produced in A.C. circuit breaker is always_____________?
11 / 50
In BJT, the forward biased base emitter junction inject holes from base to emitter, the holes_______?
12 / 50
Materials exhibiting zero value of resistivity are known as ____________ ?
13 / 50
In a load curve the highest point represents______________?
14 / 50
___________________has least range of speed control?
15 / 50
A 12 k? resistor, a 15 k? resistor, and a 22 k? resistor are in series with two 10 k? resistors that are in parallel. The source voltage is 75 V. Current through the 15 k? resistor is approximately___________?
16 / 50
Which of the following is the non-linearity caused by servomotor ?
17 / 50
Four resistors are connected in parallel. Fifteen mA flows through resistor R. If the second resistor is 2R, the third resistor 3R, and the fourth resistor 4R, the total current in the circuit is______________?
18 / 50
The commonly used material for shielding or screening magnetism is____________?
19 / 50
Which of the following circuit elements will oppose the change in circuit current ?
20 / 50
A glass rod when rubbed with silk cloth is charged because__________?
21 / 50
The transient currents are associated with the____________?
22 / 50
The power factor of a D.C. circuit is always__________?
23 / 50
The purpose of providing iron core in a step-up transformer is?
24 / 50
Which of the following single-phase motors is suitable for timing and control purposes ?
25 / 50
Double tuned circuits are used in ____________ stages of a radio receiver?
26 / 50
In a dynamometer 3-phase power factor meter, the planes of the two moving coils are at_____________?
27 / 50
The purpose of using short-circuit gear is___________?
28 / 50
Five light bulbs are connected in parallel across 110 V. Each bulb is rated at 200 W. The current through each bulb is approximately___________?
29 / 50
An ammeter should have_____________ resistance?
30 / 50
The loads on distributors systems are generally__________________?
31 / 50
In a transistor, the base current is about_________of emitter current?
32 / 50
If two charges are increased by two times then force_____________?
33 / 50
At _______ frequencies the parallel R-L circuit behaves as purely resistive
34 / 50
The design of mechanical parts is particularly important in case of __________ speed machines?
35 / 50
A VTVM has_____________input resistance than that of a multi meter?
36 / 50
In an AC co-ordinate potentiometer, the currents in the phase and quadrature potentiometer are adjusted to be_____________?
37 / 50
In an RC coupled amplifier, the voltage gain over mid-frequency range_____________?
38 / 50
If the input capacitor of a transistor amplifier is short-circuited, then_________________?
39 / 50
In an RC coupling scheme, the coupling capacitor CC must be large enough______________?
40 / 50
Which of the following is a bilateral element?
41 / 50
Two D.C. shunt generators, each with armature resistance of 0.02 ohm and field resistance of 50 ohm run in parallel and supply a total current of 1000 amperes to the load circuit. If their e.m.fs. are 270 V and 265 V, their bus bar voltage will be_____________________?
42 / 50
A thyristor is basically________?
43 / 50
Leakage current flows through the thyristor in_________?
44 / 50
Addition of 0.3 to 4.5% silicon to iron ________ the electrical resistivity of iron?
45 / 50
Compared to transistor, _________ have lower on state conduction losses and higher power handling capability?
46 / 50
A conductor carries 125 amperes of current under 60? to a magnetic field of 1.1 tesla. The force on the conductor will be nearly______________?
47 / 50
The chemical used in breather for transformer should have the quality of____________?
48 / 50
Which of the following insulation is used in cables ?
49 / 50
For constant torque drive which speed control method is preferred ?
50 / 50
The capacity of a crane is expressed in terms of_______________?
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