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