Electrical Engineering Quiz 18
1 / 50
Power plant having maximum demand more than the installed rated capacity will have utilization factor?
2 / 50
If current in a conductor increases then according to Lenz?s law self-induced voltage will____________?
3 / 50
LISN is a device used to measure conducted emissions. LISN stands for_____________?
4 / 50
In self cooled motors the cooling time constant is about ___________ than the heating time constant because cooling conditions are worse at standstill?
5 / 50
If load (or torque) angle of a 4-pole synchronous motor is 6? electrical, its value in mechanical degrees is__________?
6 / 50
When two batteries are connected in parallel, it should be ensured that___________?
7 / 50
A differential amplifier has a differential gain of 20,000 . CMRR=80 d The common mode gain is given by________?
8 / 50
If the full-scale deflection current of a multimeter is 50 ?A, its sensitivity is ________________?
9 / 50
In a synchronous motor, the breakdown torque is__________?
10 / 50
A Transformer transforms____________?
11 / 50
What will be the phase angle between two alternating waves of equal frequency, when one wave attains maximum value the other is at zero value________ ?
12 / 50
A.C. servomotor resembles_____________?
13 / 50
Form Factor is the ratio of__________?
14 / 50
The time taken by the machine to attain 0.632 of its final steady temperature rise is called_____________?
15 / 50
The noise produced by a ___________ cooled machine is less as the rotor moves in a medium of smaller density?
16 / 50
An amplifier using an opamp with slew rate SR=1v/?sec has a gain of 40db.if this amplifier has to faithfully amplify sinusoidal signals from dc to 20 KHz without introducing any slew-rate induced distortion, then the input signal level must not exceed________?
17 / 50
Modulation is done in____________________
18 / 50
Bucket elevators are used for___________?
19 / 50
The series and parallel resonance on L-C circuit? differs in that_________?
20 / 50
A CRO is used to measure _________________?
21 / 50
The maximum efficiency of a distribution transformer is____________?
22 / 50
The main disadvantage of the Ward-Leonard control method is______________?
23 / 50
Two plates of a parallel plate capacitor after being charged from a constant voltage source are separated apart by means of insulated handles, then the____________?
24 / 50
When the motor is at its maximum speed then back emf will be______________?
25 / 50
Which D.C. motor is preferred for elevators ?
26 / 50
Curtis turbine is_____________?
27 / 50
The noise factor of an ideal amplifier expressed in db is_____________?
28 / 50
The knowledge of diversity factor helps in determining__________?
29 / 50
Selenium becomes a conductor in light so it behaves like____________?
30 / 50
When the excitation of an unloaded salient pole synchronous motor suddenly gets disconnected______________?
31 / 50
If the doping level is increased, the breakdown voltage of the Zener_______________?
32 / 50
Carbon resistors are used extensively because they are____________?
33 / 50
The two conductors of a transmission line carry equal current I in opposite directions. The force on each conductor is________________?
34 / 50
An electric current induced within the body of a conductor when that conductor either moves through a non uniform magnetic field or in a region where there is a change in magnetic flux is called_____________?
35 / 50
For which of the following parameter variation, the capacitance of the capacitor remains unaffected ____________?
36 / 50
Dielectric strength of a material depends on_____________?
37 / 50
For the protection of power station buildings against direct strokes the requirements are___________?
38 / 50
If 2% of the main current is to be passed through a galvanometer of resistance G, then resistance of the shunt required is ________________?
39 / 50
Which quantity consists of a unit 1KWh ?
40 / 50
Which type of load is offered by cranes and hoists ?
41 / 50
is an element used in semiconductors whose atoms have three valence electrons?
42 / 50
Which of the following in an application of D.C. motors?
43 / 50
If a transformer is continuously operated the maximum temperature rise will occur in_______________?
44 / 50
In a square ? wave operation of 3 phase CSIs, the power values are on for___________?
45 / 50
__________________ has relatively wider range of speed control?
46 / 50
The dimensions of hie parameter are _______________?
47 / 50
The inverse of capacitance is called_______________?
48 / 50
The operating voltage of supertension cables is up to_________________?
49 / 50
The superposition theorem is applicable to____________?
50 / 50
Which of the following is essentially needed while selecting a motor ?
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