Electrical Engineering Quiz 43
1 / 50
The unit of resistivity is
2 / 50
The voltage of the single phase supply to residential consumers is_____________?
3 / 50
In voltage divider bias, VCC = 25 V; R1 = 10 kO; R2 = 2.2 V ; RC = 3.6 V and RE =1 kO. What is the emitter voltage?
4 / 50
A 220 V D.C. generator is run at full speed without any excitation. The open circuit voltage will be_____________?
5 / 50
A good control system has all the following features except_____________?
6 / 50
A Triac is a ______________?
7 / 50
In a meggar controlling torque is provided by______________?
8 / 50
An SCR has __________ pn junctions?
9 / 50
Electric flux linked with a surface will be maximum when____________?
10 / 50
For an integrating circuit to be effective , the RC product should be____________ the time period of the input wave?
11 / 50
An efficient and a well designed protective relaying should have_____________?
12 / 50
Which of the following motors has two separate windings on the motor ?
13 / 50
In case of D.C. shunt motors the speed is dependent on back e.m.f. only because____________?
14 / 50
In D.C. machines the residual magnetism is of the order of_________________?
15 / 50
A MOSFET differs from a JFET mainly because _________________?
16 / 50
A direct on line starter is used: for starting motors___________?
17 / 50
Equilizer rings are required in case armature is_______________?
18 / 50
If one-phase of a 3-phase synchronous motor is short-circuited, motor will ______________?
19 / 50
An SCR has ___________semiconductor layers?
20 / 50
DIAC are specifically designed to trigger______________?
21 / 50
Farad is the unit of___________?
22 / 50
A capacitor in a circuit became hot and ultimately exploded due to wrong connections, which type of capacitor it could be ?
23 / 50
The metal having the lowest temperature coefficient of resistance is_________________?
24 / 50
At cut-off, the JFET channel is _____________?
25 / 50
Which of the following is used in SCR to protect from high dV / dt__________________?
26 / 50
Stability of a synchronous machine:
27 / 50
An ideal OP-AMP is an ideal__________?
28 / 50
Satisfactory commutation of D.C. machines requires______________?
29 / 50
The current drawn by the line due to corona losses is___________?
30 / 50
Power transformers have rating_______________?
31 / 50
In a CE amplifier, voltage gain =____________________ x RAC/Rin?
32 / 50
The size of a power transistor is made considerably large to________________?
33 / 50
In a 3-phase synchronous motor, the negative phase sequence exists when the motor is_______________?
34 / 50
IC = [a / (1 ? a )] IB + [___________ / (1 ? a )?
35 / 50
The short circuit in any winding of the transformer is the result of______________?
36 / 50
If level of modulation is increased ______________ power is increased?
37 / 50
If the field winding of an unloaded salient pole synchronous motor is open circuited, the motor will__________?
38 / 50
A transformer can have regulation closer to zero___________?
39 / 50
Which of the following equipment provides fluctuating load?
40 / 50
Energy stored in the electric field of a capacitor C when charged from a D.C source of voltage V is equal to joules_______________?
41 / 50
Which of the following is the loss within the mercury arc rectifier chamber ?
42 / 50
Out of the following which is an insulating material____________?
43 / 50
A non-dimensional number generally associated with natural convection heat transfer is____________?
44 / 50
A Wheatstone bridge can be used to determine an unknown_____________?
45 / 50
A constant-voltage generator has___________?
46 / 50
In Ns is the synchronous speed and s the slip, then actual running speed of an induction motor will be___________?
47 / 50
A unit tube of flux is known as tube___________?
48 / 50
The weight of copper of both armature and field windings decreases with __________ in number of poles?
49 / 50
A voltage of about 200 V can be measured__________________?
50 / 50
Which of the following quantities consists of SI unit as WATT ?
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