Lap winding is composed of

In a steam engine, one method of obtaining the earlier cut-off with a simple slide valve is by increasing the angle of advance of the eccentric while the throw of the eccentric, steam lap and exhaust lap are kept constant. This method will

A

Cause withdrawing or throttling of steam

B

Reduce length of effective stroke of piston

C

Reduce maximum opening of port to steam

D

All of these

In D.C. generators, lap winding is used for

A

High voltage, high current

B

Low voltage, high current

C

High voltage, low current

D

Low voltage, low current

In the case of lap winding resultant pitch is

A

Multiplication of front and back pitches

B

Division of front pitch by back pitch

C

Sum of front and back pitches

D

Difference of front and back pitches

In lap winding, the number of brushes is always

A

Double the number of poles

B

Same as the number of poles

C

Half the number of poles

D

Two

The number of armature parallel paths in a two-pole D.C. generator having duplex lap winding is

A

2

B

4

C

6

D

8

A 4 pole generator with 16 coil has a 2-layer lap winding. The pole pitch is -

A

8

B

4

C

16

D

32

Some wire- wound resistors have bifilar winding. This type of winding is used to

A

Increase the thermal stability

B

Reduce the tolerance

C

Reduce the inductance of winding

D

Double the power rating of the resistor

________ cooling is the process of dissipating the armature and field winding losses to a cooling medium circulating within the winding insulation wall

A

Direct

B

Indirect

C

Conventional

D

Any of the above

Wave winding is composed of

A

Any even number of conductors

B

Any odd number of conductors

C

That even number which is exact multiple of poles + 2

D

That even number which is exact multiple of poles

In a class composed of x girls and y boys what part of the class is composed of girls ?

A

y / ( x + y )

B

x / xy

C

x / ( x + y)

D

y / xy

Lap winding is composed of

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