Electrical Engineering Quiz 61
1 / 50
If the field circuit of an unloaded salientpole synchronous motor gets suddenly open-circuited, then
2 / 50
The ratio of intensity of magnetisation to the magnetisation force is known as_____________?
3 / 50
The value of flux involved m the e.m.f. equation of a transformer is____________?
4 / 50
A high Q tuned circuit will permit an amplifier to have high __________________?
5 / 50
If the centrifugal switch of a two-value capacitor motor using two capacitors fails to open then____________?
6 / 50
Equipotential planes are_______________?
7 / 50
In order that a hydrometer may float vertically in electrolyte its C.G. should be___________?
8 / 50
A substance whose molecules consist of dissimilar atoms is called____________?
9 / 50
If the centrifugal switch does not open at 70 to 80 percent of synchronous speed of motor, it would result in_________?
10 / 50
Which motor should not be started on no-load ?
11 / 50
The body of Edison cell is made of___________?
12 / 50
In a D.C. machine stray loss is the sum of_____________?
13 / 50
A balanced Wheatstone bridge consists of an RV of 3,500 ?, an R2 of 200 ?, and an R3 of 680 ?. The value of RUNK is____________?
14 / 50
The secondary winding of which of the following transformers is always kept closed?
15 / 50
An ideal traction system should have_______________?
16 / 50
Switching of a lamp in house produces noise in the radio. This is because switching operation produces________?
17 / 50
D.C. generator generally preferred for charging automobile batteries is______________?
18 / 50
The insulating material for cables should____________?
19 / 50
An RC high-pass filter consists of an 820 ? resistor. What is the value of C so that Xc is ten times less than Rat an input frequency of 12 kHz?
20 / 50
In a parallel R-C circuit, the current always________the applied voltage?
21 / 50
Which of these is the best description for a Zener diode ?
22 / 50
With 21 V applied, if R1 = 5 ohms, R2 = 35 ohms, and R3 = 14 ohms, what is the current of R2 if R1 is series connected with parallel circuit R2 and R3?
23 / 50
Reciprocal of reluctance is_______________?
24 / 50
Change of D.C. excitation of a synchronous motor changes:
25 / 50
All good conductors have high____________?
26 / 50
The applications of selenium rectifiers are usually limited to potential of_____________?
27 / 50
Which D.C. motor has got maximum self relieving property ?
28 / 50
Which of the following loss in a transformer is zero even at full load ____________?
29 / 50
Four wires of same material, the same cross-sectional area and the same length when connected in parallel give a resistance of 25 Q. If the same four wires are connected is series the effective resistance will be________?
30 / 50
Cables for 220 kV lines are invariably____________?
31 / 50
Pipes carrying steam are generally made up of_____________?
32 / 50
To avoid formation of grooves in the commutator of a D.C. machine?
33 / 50
A D.C. series motor is that which______________?
34 / 50
In a D.C. shunt motor, under the conditions of maximum power, the current in the armature will be_____________?
35 / 50
For germanium the forbidden energy gap is_______________?
36 / 50
The value of stability factor for a base resistor bias is________________?
37 / 50
Which of the following is the definition of proportional band of a controller ?
38 / 50
Power dissipation in ideal inductor is
39 / 50
The power factor of an induction motor under no-load conditions will be closer to_____________?
40 / 50
The starting winding of a single-phase motor is placed in_________?
41 / 50
In pneumatic control systems the control valve used as final control element converts____________?
42 / 50
In Ward-Leonard control the lower limit of speed is imposed by________?
43 / 50
Which of the following is an advantage of heating by electricity ?
44 / 50
A double squirrel-cage induction motor has______________?
45 / 50
A material which is slightly repelled by a magnetic field is known as_____________?
46 / 50
Artificial draught is produced by____________?
47 / 50
In thermal-electrical analogy charge is considered analogous to_______________?
48 / 50
_____________is not a final control element?
49 / 50
In repulsion motor direction of rotation of motor____________?
50 / 50
Find the force acting on a conductor 3m long carrying a current of 50 amperes at right angles to a magnetic field having a flux density of 0.67 tesla
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