Electrical Engineering Quiz 50
1 / 50
In a flyback converter, the inductor of the buck-boost converter has been replaced by a_____________?
2 / 50
With direct water cooling it is possible to have ratings of about_____________?
3 / 50
Specific energy consumption is affected by which of the following factors ?
4 / 50
Galvanised steel wire is generally used as______________?
5 / 50
For which of the following locomotives the maintenance requirements are the least ?
6 / 50
Which of the following is disadvantage of fast recovery diodes?
7 / 50
The current due to electron flow in conduction band is the hole current in valence band?
8 / 50
ICs are generally made of ________________?
9 / 50
The speed of a motor falls from 1100 r.p.m. at no-load to 1050 r.p.m. at rated load. The speed regulation of the motor is______________?
10 / 50
The r.m.s. value of pure cosine function is_________?
11 / 50
The heated parts of an electrical machine dissipate heat into their surroundings by which of the following modes of heat dissipation ?
12 / 50
A mercury arc rectifier possesses __________ regulation characteristics
13 / 50
Out of the following capacitors of identical rating which one will have the smallest dimensions ___________ ?
14 / 50
Solid type cables are considered unreliable beyond 66 kV because___________?
15 / 50
Laminations of core are generally made of________________?
16 / 50
Capacitance grading of cable implies__________?
17 / 50
The Graetz bridge makes excellent use of ______________?
18 / 50
The double energy transient occur in the____________?
19 / 50
If the value of collector current IC increases, then the value of VCE ______________?
20 / 50
Thyristor can be protected from over voltages by using____________?
21 / 50
Between the branch voltages of a loop the Kirchhoff s voltage law imposes_____________?
22 / 50
The r.m.s. value and mean value is the same in the case of___________?
23 / 50
The e.m.f. of an Edison cell, when fully charged, is nearly______________?
24 / 50
According to Fleming?s right-hand rule for finding the direction of induced e.m.f., when middle finger points in the direction of induced e.m.f., forefinger will point in the direction of____________?
25 / 50
If the collector supply is 10V, then collector cut off voltage under d.c. conditions is _______________?
26 / 50
Rankine cycle efficiency of a good steam power plant may be in the range of____________?
27 / 50
Dielectric strength of a medium is usually expressed in____________?
28 / 50
Star/star transformers work satisfactorily when________________?
29 / 50
The battery connections required to forward bias a pn junction are_________________?
30 / 50
?Maximum power output is obtained from a network when the load resistance is equal to the output resistance of the network as seen from the terminals of the load?. The above statement is associated with____________?
31 / 50
Which of the following methods may be adopted to reduce the effects of armature reaction ?
32 / 50
Two-value capacitor motor finds increased application as compressor motor in small home air-conditioners because_____________?
33 / 50
In a regenerative feed heating cycle, the optimum value of the fraction of steam extracted for feed heating________________?
34 / 50
In voltage divider bias, operating point is 3 V, 2 m If VCC = 9 V, RC = 2.2 kO, what is the value of RE ?
35 / 50
The function of breather in a transformer is___________?
36 / 50
The noise produced by a transformer is termed as_______________________?
37 / 50
The range of efficiency for shaded pole motors is______________?
38 / 50
The resistivity of water should not be less than_____________?
39 / 50
The voltage control in electric supply networks in required on account of which of the following reasons ?
40 / 50
The high voltage winding is usually which of the following type ?
41 / 50
Two multimeters A and B have sensitivities of 10 kO/V and 30 kO/V respectively. Then ______________?
42 / 50
The maximum load that a power transformer can carry is limited by its________________?
43 / 50
1 angstrom is equal to______________?
44 / 50
A power semiconductor may undergo damage due to____________?
45 / 50
A 200 turn coil having an axial length of 30 mm and a radius of 10 mm is pivoted in a magnetic field having a flux density of 0.8 T. If the coil carries a current of 0.5 A, the torque acting on the coil will be_____________?
46 / 50
Mica capacitors are characterized by all of the following except___________?
47 / 50
In RC coupling, the value of coupling capacitor is about_______________?
48 / 50
Welding generator will have____________?
49 / 50
What happen due to high di / dt____________?
50 / 50
In a cable, the maximum stress under operating conditions is at___________?
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