Electrical Engineering Quiz 14
1 / 50
In a stable control system backlash can cause which of the following ?
2 / 50
Transformer works on the principle of________________?
3 / 50
jCorona usually occurs when the electrostatic stress in air around the conductor exceeds?
4 / 50
The wheels of a train, engine as well as bogies, are slightly tapered to_____________?
5 / 50
Equivalent capacitance is greater than individual capacitances in_____________?
6 / 50
Different generating stations use following prime movers?
7 / 50
A CE amplifier is also called _______________ circuit?
8 / 50
An ammeter has an internal resistance of 50 ?. The meter movement itself can handle up to 1 m If 10 mA is applied to the meter, the shunt resistor, RSH1, is approximately___________?
9 / 50
By which of the following methods major portion of the heat generated in a H.R. fuse is dissipated ?
10 / 50
The draught produced by steel chimney as compared to that produced by brick chimney for the same height is_____________?
11 / 50
The random motion of holes and free electrons due to thermal agitation is called______________?
12 / 50
An over excited synchronous motor is used for____________?
13 / 50
The input current waveform of a bridge controlled rectifier when the load is perfectly filtered is___________?
14 / 50
Cell short circuit results in_________?
15 / 50
The fuse blows off by___________?
16 / 50
A low utilization factor for a plant indicates that
17 / 50
A crack in the magnetic path of an inductor will result in________________?
18 / 50
The purpose of providing dummy coils in a generator is__________________?
19 / 50
The current flowing through an unloaded voltage divider is called the____________?
20 / 50
For the same secondary voltage, the output voltage from a centre-tap rectifier is___________ than that of bridge rectifier?
21 / 50
If a copper disc is rotated rapidly below a freely suspended magnetic needle, the magnetic needle shall start rotating with a velocity?
22 / 50
When the lead-acid cell is fully charged, the electrolyte assumes _______ appearance
23 / 50
For a sine wave with peak value Imax the r.m.s. value is_______?
24 / 50
In an A.C. circuit power is dissipated in____________?
25 / 50
Standard resistor is made from_________________?
26 / 50
Series capacitors on transmission lines are of little use when the load VAR requirement is___________?
27 / 50
The unit of flux is the same as that of_______________?
28 / 50
In a magnetic material hysteresis loss takes place primarily due to___________?
29 / 50
The differential voltage gain of a differential amplifier is equal to RC divided by _______________?
30 / 50
The output current in PWM DC ? DC converters is equal to___________?
31 / 50
Level of electrolyte in a cell should be ________ the level of plates
32 / 50
Which of the following statements is not necessarily correct for open control system ?
33 / 50
The net armature voltage of a synchronous motor is equal to the_______________?
34 / 50
When an alternating current passes through an ohmic resistance the electrical power converted into heat is__________?
35 / 50
Which of the following power plant has highest Depreciation charges?
36 / 50
In normal operation of an SCR, gate is _____________w.r.t. cathode?
37 / 50
A.C and D.C have the same______________?
38 / 50
In case of _______________ speed control by injecting e.m.f. in the rotor circuit is possible?
39 / 50
The output of a microphone is rated at -52 db. The reference level is 1V under specified conditions. What is the output voltage of this microphone under the same sound conditions?
40 / 50
The letters AVC stand for ________________?
41 / 50
How does the magnetic compass needle behave in a magnetic field ?
42 / 50
The ideal OP-AMP has the following characteristics
43 / 50
The insulating material for a cable should have__________?
44 / 50
Ward Leonard method of speed control is basically a______________?
45 / 50
As the temperature of a transistor goes up, the base-emitter resistance___________?
46 / 50
Helical coils can be used on___________________?
47 / 50
To determine the polarity of the voltage drop across a resistor, it is necessary to know___________?
48 / 50
The fuse wire, in D.C. circuits, is inserted in____________?
49 / 50
Mercury cell has which of the following characteristics ____________?
50 / 50
The purpose of resistance in the emitter circuit of a transistor amplifier is to _________________?
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