The thickness of insulation provided on the conductor depends on

The thickness of the layer of insulation on the conductor, in cables, depends upon

A

Reactive power

B

Power factor

C

Voltage

D

Current carrying capacity

The insulation on a current carrying conductor is provided

A

To prevent leakage of current

B

To prevent shock

C

Both of above factors

D

None of above factors

The line insulation is the insulation level of the station equipment.

A

less than

B

same as

C

more than

D

proportional to

E

not directly related with

The insulation between windings and grounded core and the insulation between the windings of the same phase is

A

minor insulation

B

major insulation

C

either of the above

D

none of the above

Upto the critical radius of insulation, added insulation, will

A

Increase the heat loss

B

Decrease heat loss and will have no effect beyond that

C

Decrease heat flux

D

Reduce convection heat loss compared to conduction heat less

When a current carrying conductor is brought into magnetic field, the force that moves the conductor depends upon

A

The value of current

B

The weight of the conductor

C

The direction of the conductor

D

None of the above

The correct relationship among displacement thickness d, momentum thickness m and energy thickness e is

A

d > m > e

B

d > e > m

C

e > m > d

D

e > d > m

The critical thickness of insulation for a sphere is

A

k/h₀

B

2k/h₀

C

h₀/k

D

h₀/2k

A practical formula for determining the thickness of insulation between low voltage and high voltage windings is

A

1 + 0.2 kV mm

B

2 + 0.5 kV mm

C

4 + 0.7 kV mm

D

5 + 0.9 kV mm

For a given ambient air temperature with increase in the thickness of insulation of a hot cylinderical pipe, the rate of heat loss from the surface would

A

Decrease

B

Increase

C

First decrease and then increase

D

First increase and then decrease

The thickness of insulation provided on the conductor depends on

Related Questions