Electrical Engineering Quiz 32
1 / 50
______________ multivibrator is a square wave oscillator?
2 / 50
Undercharging___________?
3 / 50
In a transmitter ____________oscillator is used?
4 / 50
The voltage drop between the anode and cathode, of a mercury arc rectifier comprises of the following_____________?
5 / 50
With rise in temperature the resistance of pure metals______________?
6 / 50
In a load commutated DC ? DC chopper, the capacitor has a_____________?
7 / 50
Which D.C. motor has got maximum self loading property?
8 / 50
The main function of a fuse is to_____________?
9 / 50
For which of the following ratings of the transformer differential protection is recommended ?
10 / 50
Which of the following is non-linear circuit parameter?
11 / 50
Overmodulation (amplitude) occurs when signal amplitude is _____________ carrier amplitude?
12 / 50
A synchronous motor is running on a load with normal excitation. Now if the load on the motor is increased
13 / 50
A series resonant band-stop filter consists of a 68 ? resistor, a 110 mH coil, and a 0.02 ?F capacitor. The internal resistance, RW, of the coil is 4 ?. Input voltage is 200 mV. Output voltage is taken across the coil and capacitor in series. What is the output voltage magnitude at f0?
14 / 50
Two lamps 100 W and 40 W are connected in series across 230 V (alternating). Which of the following statement is correct ?
15 / 50
Let of a thyristor Vc1, Vc2, Vc3 are forward break over voltage for gate current Ig1, Ig2, Ig3 respectively. Then________________?
16 / 50
The torque of a rotor in an induction motor under running condition is maximum__________?
17 / 50
At parallel resonance, the ratio L/C is ______________?
18 / 50
Electrical power output in a D.C. generator is equal to_____________?
19 / 50
A rotary converter is a single machine with______________?
20 / 50
In a low power factor wattmeter the pressure coil is connected_______________?
21 / 50
The ?cogging? of an induction motor can be avoided by____________?
22 / 50
The function of ferrite antenna is to_________________?
23 / 50
The output voltage Vo of the above circuit is____________?
24 / 50
The braking retardation is usually in the range__________________?
25 / 50
The draught which a chimney produces is called_____________?
26 / 50
The return circuit for tramcars is through_______________?
27 / 50
The resistivity of the conductor depends on
28 / 50
When SCR is OFF, the current in the circuit is ________________?
29 / 50
In D.C. machines the width of the duct is usually_____________?
30 / 50
The effect of considering friction losses in steam nozzle for the same pressure ratio leads to________?
31 / 50
It is advisable to avoid line starting of induction motor and use starter because____________?
32 / 50
In the a.c. equivalent circuit of a transistor amplifier, the capacitors are considered ___________________?
33 / 50
The initial rate of rise of current through a coil of inductance 10 H when suddenly connected to a D.C. supply of 200 V is__________Vs
34 / 50
When the voltage applied to a synchronous motor is increased, which of the following will reduce?
35 / 50
A certain voltage divider consists of three 1 k? resistors in series. Which of the following load resistors will have the least effect on the output voltage?
36 / 50
Two oppositely charged balls A and B attract third conducting ball C when placed near them turn by turn. Then ball C must be______________?
37 / 50
The full-load copper loss of a trans?former is 1600 W. At half-load, the copper loss will be___________?
38 / 50
A gang condenser is a____________?
39 / 50
In an electric kettle water boils in 10 m minutes. It is required to boil the boiler in 15 minutes, using same supply mains______________?
40 / 50
In a star-delta starter of an induction motor___________?
41 / 50
The capacity of a lead-acid cell does not depend on its___________?
42 / 50
The maximum efficiency of a half-wave rectifier is _____________?
43 / 50
When the rotor speed, in a synchronous machine, becomes more than the synchronous speed during hunting, the damper bars develop_________________?
44 / 50
A change of 4% of supply voltage to an induction motor will produce a change of approximately ________?
45 / 50
MOSFET can be used as a__________?
46 / 50
Three 10 k? resistors are connected in series. A 20 k? resistor is connected in parallel across one of the 10 k? resistors. The voltage source is 24 V. The total current in the circuit is___________?
47 / 50
A differentiator is usually not a part of a control system because it______________?
48 / 50
Higher the self-inductance of a coil_____________?
49 / 50
The wattage rating for a ceiling fan motor will be in the range_________?
50 / 50
In case one phase of a three-phase synchronous motor is short-circuited the motor will____________?
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