Electrical Engineering Quiz 41
1 / 50
In a synchronous motor, the maximum power developed depends on all of the following except:
2 / 50
Which of the following material has nearly zero temperature co-efficient of resistance_________?
3 / 50
A reluctance motor_________________?
4 / 50
The signal voltage induced in the aerial of a radio receiver is of the order of ________________?
5 / 50
The resistivity of a pure silicon is about _______________?
6 / 50
A conditionally stable system exhibits poor stability at______________?
7 / 50
Part of the transformer which is most subject to damage from overheating is_____________?
8 / 50
The bearings used to support the rotor shafts are generally______________?
9 / 50
In case all the flux from the current in coil 1 links with coil 2, the co-efficient of coupling will be____________?
10 / 50
Bulbs in street lighting are all connected in_____________?
11 / 50
In the initial stages of a multistage amplifier, we use______________?
12 / 50
The terminal voltage of a series generator is 150 V when the load current is 5 If the load current is increased to 10 A, the terminal voltage will be____________?
13 / 50
The inductance of a coil will increase under all the following conditions except______________?
14 / 50
For which of the following materials the saturation value is the highest ?
15 / 50
A debouncing circuit is________________?
16 / 50
An over excited synchronous motor on no load is known as__________?
17 / 50
___________________is preferred for synthetic fibre mills?
18 / 50
In a portable instrument, the controlling torque is provided by_____________?
19 / 50
The electric motor used in portable drills is__________?
20 / 50
impose limitation on design____________?
21 / 50
The slope of a.c. load line is ______________ that of d.c. load line?
22 / 50
Which of the following generating station has minimum running cost?
23 / 50
If a transistor amplifier draws 2mA when input voltage is 10 V, then its input impedance is ____________?
24 / 50
While selecting motor for an air conditioner which of the following characteristics is of great importance ?
25 / 50
The channel of a JFET is between the ________________?
26 / 50
In commutation PAC stands for_______?
27 / 50
In D.C. machines, ir order to prevent excessive distortion of field form by the armature reaction, the field mmf must be made____________?
28 / 50
When a D.C. series motor is connected to A.C. supply, the power factor will be low because of____________?
29 / 50
In a three-phase induction motor, the number of poles in the rotor winding is always__________?
30 / 50
For the same draught produced the power of induced draught fan as compared to forced draught fan is___________?
31 / 50
In a squirrel cage motor the induced e.m.f. is___________?
32 / 50
Air blast circuit breakers for 400 kV power system are designed to operate in_______________?
33 / 50
The operating point ________________ on the a.c. load line?
34 / 50
In a 3-phase power measurement by two wattmeter method, both the watt meters had identical readings. The power factor of the load was___________?
35 / 50
The rectifier instrument is not free from_______________?
36 / 50
The armature voltage control of D.C. motor provides____________?
37 / 50
Indicate which of the following material does not retain magnetism permanently
38 / 50
The resistance of a copper wire 200 m long is 21 Q. If its thickness (diameter) is 0.44 mm, its specific resistance is around_______________?
39 / 50
The relative permeability is less than unity is case of_____________?
40 / 50
The magnetic reluctance of a material______________?
41 / 50
is a negatively charged particle present in an atom______________?
42 / 50
The self-inductance of a solenoid is increased when a soft iron core is inserted into it. This is because the soft iron core_______________?
43 / 50
A capacitor-start single phase induction motor is switched on to supply with its capacitor replaced by an inductor of equivalent reactance value. It will______________?
44 / 50
The maximum length of a screw conveyer is about___________?
45 / 50
The temperature inside a furnace is usually measured by which of the following ?
46 / 50
What is the octal equivalent of the binary number : 10111101 ?
47 / 50
Two generators A and B have 6-poles each. Generator A has wave wound armature while generator B has lap wound armature. The ratio of the induced e.m.f. is generator A and B will be_______________?
48 / 50
According to Kirchhoffs voltage law, the algebraic sum of all IR drops and e.m.fs. in any closed loop of a network is always____________?
49 / 50
The node voltage at the top of the til resistor is closes to________________?
50 / 50
In a grid control of mercury arc rectifiers when the grid is made positive relative to cathode, then it the electrons on their may to anode.
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