Electrical Engineering Quiz 36
1 / 50
____________is a fixed frequency oscillator?
2 / 50
In closed loop control system, with positive value of feedback gain the overall gain of the system will______________?
3 / 50
For the same a.c. power output as above, what should be the minimum power rating of transistor for class B operation?
4 / 50
Poor power factor________?
5 / 50
A mica capacitor and a ceramic capacitor both have the same physical dimensions. Which will have more value of capacitance _______?
6 / 50
The rotor of a hysteresis motor is made of___________?
7 / 50
Which of the following statement is true________________?
8 / 50
Which of the following motors has series characteristics ?
9 / 50
Any externally introduced signal affecting the controlled output is called a______________?
10 / 50
A relay is superior to a mechanical switch because it _______________?
11 / 50
Those substances of the cell which take active part in chemical combination and hence produce electricity during charging or discharging are known as________materials
12 / 50
In jet type condensers___________?
13 / 50
On which of the following factors does the sensitivity of a closed loop system to gain changes and load disturbances depend ?
14 / 50
Specific energy consumption becomes________________?
15 / 50
In a superconductor the value of critical density depends upon______________?
16 / 50
When the dielectric is homogeneous,the potential gradient is_____________?
17 / 50
Main traction systems used in India are, those using______________?
18 / 50
A second condition for oscillations is____________?
19 / 50
In a surface condenser if air is removed, there is___________?
20 / 50
A certain Wheatstone bridge has the following resistor values: R1 = 10 k?, R2 = 720 ?, and R4 = 2.4 k?. The unknown resistance is_____________?
21 / 50
The torque developed in the cage induction motor with autostarter is___________?
22 / 50
During the charging and discharging of a nickel-iron cell____________?
23 / 50
The current flow through electrolyte is due to the movement of____________?
24 / 50
Less maintenance troubles are experienced in case of___________?
25 / 50
In a series?parallel circuit, individual component power dissipation are calculated using_____________?
26 / 50
In a phase shift oscillator, we use____________RC sections?
27 / 50
Superconductivity is observed for____________?
28 / 50
Static error coefficients are used as a measure of the effectiveness of closed loop systems for specified ___________ input signal?
29 / 50
When the temperature changes, the operating point is shifted due to _______________?
30 / 50
The number of slip rings on a squirrel cage induction motor is usually____________?
31 / 50
In which single-phase motor, the rotor has no teeth or winding ?
32 / 50
A feedback circuit usually employs _________________ network?
33 / 50
The output stage of a multistage amplifier usually employs______________?
34 / 50
Magnetic moment is a_____________?
35 / 50
The main objective of static power converters is to____________?
36 / 50
Secondary air is the air used to______________?
37 / 50
An SCR is made of silicon and not germanium because silicon _________________?
38 / 50
Which of the following D.C. generators will be in a position to build up without any residual magnetism in the poles?
39 / 50
The function of snubber circuit connected across the SCR is to___________?
40 / 50
Surface resistance of an insulating material is reduced due to the______________?
41 / 50
Locked rotor current of a shaded pole motor is____________?
42 / 50
Which of the following statement about D.C. generators is false ?
43 / 50
Flashing the field of D.C. generator means:______________?
44 / 50
In a split phase motor, the running winding should have?
45 / 50
Which of the following is not a method for estimating depreciation charges?
46 / 50
In a pure inductive circuit if the supply frequency is reduced to 1/2, the current will__________?
47 / 50
Which type of bearing is provided in small induction motors to support the rotor shaft ?
48 / 50
For a buck converter to reduce the conduction losses in diode
49 / 50
When a live conductor of public electric supply breaks down and touches the earth which of the following will happen?
50 / 50
In series resonance, there is__________________?
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