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