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