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