Electrical Power Transmission MCQs Part 32

Electrical Engineering MCQs on Power Transmission

There is a greater possibility of occurrence of corona in case of

There is a greater possibility of occurrence of corona in case of

1. Dry weather
2. Humid weather
3. Summer heat
4. Winter

Correct answer: 2. Humid weather

When a live conductor of public electric supply breaks down and touches the earth, then which of the following will happen

When a live conductor of public electric supply breaks down and touches the earth, then which of the following will happen

1. Current will flow to earth
2. No current will flow in the conductor
3. Supply voltage will drop
4. Supply voltage will increase

Correct answer: 1. Current will flow to earth

Certain uniformly loaded DC distributor is fed at both ends with equal voltages. As compared to a similar distributor fed at one end only, the drop at the middle point is

Certain uniformly loaded DC distributor is fed at both ends with equal voltages. As compared to a similar distributor fed at one end only, the drop at the middle point is

1. One-fourth
2. One-half
3. One-third
4. Twice

Correct answer: 1. One-fourth

The usual spans with RCC poles are

The usual spans with RCC poles are

1. 300-500 meters
2. 40-50 meters
3. 60-100 meters
4. 80-100 meters

Correct answer: 4. 80-100 meters

Because of skin effect

Because of skin effect

1. Current flows through the half cross-section of the conductor
2. Portion of the conductor near the surface carries less current and core of the conductor carries more current
3. Portion of the conductor near the surface carries more current and core of the conductor carries less current
4. Any of above

Correct answer: 3. Portion of the conductor near the surface carries more current and core of the conductor carries less current