Electrical Engineering Quiz 33
1 / 50
Which of the following motors is most suitable for signalling devices and many kinds of timers ?
2 / 50
The current carrying capacity of cables in D.C. is more than that in A.C. mainly due to__________?
3 / 50
Ohm?s law is not applicable to__________?
4 / 50
The sparking between two electrical contacts can be reduced by inserting a___________?
5 / 50
Weber is the unit of_____________?
6 / 50
The shaft of an induction motor is made of_____________?
7 / 50
A dielectric material must be____________?
8 / 50
Open circuit test on transformers is conducted to determine____________?
9 / 50
Starting winding of a single phase motor of a refrigerator is disconnected from the circuit by means of a___________?
10 / 50
Two holes in the disc of energy meter are drilled at the opposite sides of the spindle to_____________?
11 / 50
The specific gravity of electrolyte is measured by____________?
12 / 50
The structure sensitive property of a super conductor is______________?
13 / 50
Which mechanism allocates the binary value to the states in order to reduce the cost of the combinational circuits ?
14 / 50
. In a synchronous motor which loss varies with load ?
15 / 50
The plugging gives the____________?
16 / 50
Which of the following high resistance materials has the highest operating temperature ?
17 / 50
__________ is a hard solder?
18 / 50
Thermal runaway is not possible in FET because as the temperature of FET increases_________________?
19 / 50
In a certain parallel resonant band-pass filter, the resonant frequency is 14 kHz. If the bandwidth is 4 kHz, the lower frequency_____________?
20 / 50
Materials used in heat sink should have_____________?
21 / 50
Vout = 500 mV, and Vin = 1.3 V. The ratio Vout/ Vin expressed in dB is__________?
22 / 50
When a rectifier is loaded which of the following voltage drops take place ?
23 / 50
For an EHV equipment for maintenance first it should be isolated and connected to ground because_____________?
24 / 50
The spacing between phase conductors of a 220 kV line is approximately equal to________________?
25 / 50
In a differentially compounded D.C. motor, if shunt field suddenly opens____________?
26 / 50
The currents into a junction flow along two paths. One current is 4 A and the other is 3 The total current out of the junction is_____________?
27 / 50
In the D.C. motor the iron losses occur in____________?
28 / 50
Gas is usually not liberated due to dissociation of transformer oil unless the oil temperature exceeds?
29 / 50
The draught produced, for a given height of the chimney and given mean temperature of chimney gases_______________?
30 / 50
The resistance encountered by a train in motion is on account of_________________?
31 / 50
A capacitor consists of_____________?
32 / 50
For frequencies below the resonant frequency , a parallel LC circuit behaves as a ______________load?
33 / 50
It is required to measure the true open circuit e.m.f. of a battery. The best device is_____________?
34 / 50
Which of the following metals is generally manufactured by electrolysis process ?
35 / 50
By which of the following systems electric power may be transmitted ?
36 / 50
Which of the following is an open loop control system ?
37 / 50
Which one of the following functions like a motor ?
38 / 50
The h parameter approach gives correct results for_______________?
39 / 50
In transformers using hot rolled steel, the cross-section of the yoke is made about __________ greater than that of the core?
40 / 50
The use of strain type insulators is made where the conductors are__________?
41 / 50
The number of Boolean functions that can be generated by n variables is equal to_________________?
42 / 50
If the efficiency of a machine is to be high, what should be low __________?
43 / 50
In EMC signal, the source delivers maximum power to the input of transmission line when the transmission line input impedance
44 / 50
The two pressure coils of a single phase power factor meter have_________________?
45 / 50
Internal resistance of a cell is due to___________?
46 / 50
Which of the following is a semiconductor material ?
47 / 50
An oscillator employs___________feedback?
48 / 50
In a parallel LC circuit, if the signal frequency is decreased below the resonant frequency, then________________?
49 / 50
With a motor converter it is possible to obtain D.C. voltage only upto__________?
50 / 50
A class A power amplifier is sometimes called______________amplifier?
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