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Electrical Engineering Quiz 41

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Electrical Engineering Quiz 41

1 / 50

impose limitation on design____________?

2 / 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_______________?

3 / 50

The inductance of a coil will increase under all the following conditions except______________?

4 / 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___________?

5 / 50

Indicate which of the following material does not retain magnetism permanently

6 / 50

The bearings used to support the rotor shafts are generally______________?

7 / 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____________?

8 / 50

When a D.C. series motor is connected to A.C. supply, the power factor will be low because of____________?

9 / 50

The node voltage at the top of the til resistor is closes to________________?

10 / 50

is a negatively charged particle present in an atom______________?

11 / 50

For which of the following materials the saturation value is the highest ?

12 / 50

Which of the following material has nearly zero temperature co-efficient of resistance_________?

13 / 50

In case all the flux from the current in coil 1 links with coil 2, the co-efficient of coupling will be____________?

14 / 50

The maximum length of a screw conveyer is about___________?

15 / 50

The magnetic reluctance of a material______________?

16 / 50

What is the octal equivalent of the binary number : 10111101 ?

17 / 50

Bulbs in street lighting are all connected in_____________?

18 / 50

The signal voltage induced in the aerial of a radio receiver is of the order of ________________?

19 / 50

While selecting motor for an air conditioner which of the following characteristics is of great importance ?

20 / 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.

21 / 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____________?

22 / 50

The resistivity of a pure silicon is about _______________?

23 / 50

The relative permeability is less than unity is case of_____________?

24 / 50

The rectifier instrument is not free from_______________?

25 / 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_______________?

26 / 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_______________?

27 / 50

In a portable instrument, the controlling torque is provided by_____________?

28 / 50

The electric motor used in portable drills is__________?

29 / 50

A conditionally stable system exhibits poor stability at______________?

30 / 50

In a synchronous motor, the maximum power developed depends on all of the following except:

31 / 50

A reluctance motor_________________?

32 / 50

The operating point ________________ on the a.c. load line?

33 / 50

___________________is preferred for synthetic fibre mills?

34 / 50

An over excited synchronous motor on no load is known as__________?

35 / 50

Air blast circuit breakers for 400 kV power system are designed to operate in_______________?

36 / 50

A debouncing circuit is________________?

37 / 50

Which of the following generating station has minimum running cost?

38 / 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______________?

39 / 50

In a three-phase induction motor, the number of poles in the rotor winding is always__________?

40 / 50

The temperature inside a furnace is usually measured by which of the following ?

41 / 50

The channel of a JFET is between the ________________?

42 / 50

In D.C. machines, ir order to prevent excessive distortion of field form by the armature reaction, the field mmf must be made____________?

43 / 50

In the initial stages of a multistage amplifier, we use______________?

44 / 50

The slope of a.c. load line is ______________ that of d.c. load line?

45 / 50

If a transistor amplifier draws 2mA when input voltage is 10 V, then its input impedance is ____________?

46 / 50

In commutation PAC stands for_______?

47 / 50

For the same draught produced the power of induced draught fan as compared to forced draught fan is___________?

48 / 50

Part of the transformer which is most subject to damage from overheating is_____________?

49 / 50

In a squirrel cage motor the induced e.m.f. is___________?

50 / 50

The armature voltage control of D.C. motor provides____________?

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