Electrical Engineering Quiz 67
1 / 50
With reference to a power station which of the following is not a fixed cost?
2 / 50
The transformer oil should have _______ volatility and _______ viscosity?
3 / 50
The current gain of a bipolar transistor drops at high frequencies because of____________?
4 / 50
A certain D-MOSFET is biased at VGS = 0 V. Its data sheet specifies IDSS = 20mA and VGS(off) = -5 V. The value of the drain current is _____________?
5 / 50
______________By which of the following the system response can be tested better ?
6 / 50
The stating torque of the slip ring induction motor can be increased by adding__________?
7 / 50
Copper wire of certain length and resistance is drawn out to three times its length without change in volume, the new resistance of wire becomes__________?
8 / 50
While preparing electrolyte for a lead-acid battery___________?
9 / 50
In case of _________ fuel transportation is the major problem.
10 / 50
The mcrease in heat dissipation by air blasts is due to increase in______________?
11 / 50
In a series resonant circuit, the impedance of the circuit is___________?
12 / 50
If a multimeter has a sensitivity of 1000 O per volt and reads 50 V full scale, its internal resistance is _____________?
13 / 50
If R1 is in series with parallel connected to R2 and R3, what happens to total current if R2 opens?
14 / 50
Silicon steel is used in electrical machines because it has_____________?
15 / 50
During short circuit test iron losses are negligible because of _____________?
16 / 50
The switching function of semiconductor devices can be characterized with___________?
17 / 50
What will be the reflection co-efficient of the wave of load connected to transmission line if surge impedance of the line is equal to load ?
18 / 50
Satellite power requirement is provided through________?
19 / 50
Five 100 ? resistors are connected in parallel. If one resistor is removed, the total resistance is______________?
20 / 50
An induction wattmeter can be used for_________________?
21 / 50
Slip ring motor is recommended where____________?
22 / 50
In amplitude modulation, the _____________of carrier is varied according to the strength of the signal?
23 / 50
A phase shifting transformer is used in conjunction with_______________?
24 / 50
If the gate of a JFET is made less negative, the width of the conducting channel__________________?
25 / 50
Artificial draught is produced by______________?
26 / 50
In a cable the voltage stress is maximum at____________?
27 / 50
What may happen high dV / dt____________?
28 / 50
E.m.f. of a Weston cell is accurately measured by________________?
29 / 50
A 3-phase slip ring motor has____________?
30 / 50
If the power rating of a transistor is 1W and collector current is 100mA, then maximum allowable collector voltage is________________?
31 / 50
Which medium has the least dielectric strength ____________?
32 / 50
The most commonly used semiconductor in the manufacture of a transistor is_____________?
33 / 50
The input impedance of a transistor connected in___________arrangement is the highest?
34 / 50
A pump induction motor is switched on to a supply 30% lower than its rated voltage. The pump runs. What will eventually happen ? It will____________?
35 / 50
Which of the following meters are not used on D.C. circuits______________?
36 / 50
Which of the following is not a unit of flux?
37 / 50
A synchronous motor can be used as a synchronous capacitor when it is____________?
38 / 50
Which of the following types of motor enclosure is safest ?
39 / 50
The minimum charge on an ion is______________?
40 / 50
On overcharging a battery____________?
41 / 50
In a D.C. generator the critical resistance can be increased by_____________?
42 / 50
The use of permanent magnets is. not made in_____________?
43 / 50
The disadvantage of impedance matching is that it _______________?
44 / 50
Ajax Wyatt furnace is started when____________?
45 / 50
When a given transformer is run at its rated voltage but reduced frequency, its____________?
46 / 50
Which of the following relays is used on long transmission lines?
47 / 50
A Zener diode that has very narrow depletion layer will breakdown by____________ mechanism?
48 / 50
In split phase motor main winding is of _____________?
49 / 50
Substances which have permeability less than the permeability of free space are known as_____________?
50 / 50
The ratio of active power to apparent power is known as factor__________?
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