Distribution Systems Quiz

For purely domestic loads which type of distribution is employed?

• Single phase two wire

• 3 phase 3 wire

• 3 phase 4 wire

• None of these

Where the radial systems are generally employed?

• Where power is generated at low voltage.

• Where power is generated at high voltage.

• Where power is generated at low voltage and substation is located at the centre of the load.

• Where power is generated at high voltage and substation is located at the centre of the load.

What is the main advantage of ring main system over radial system?

• Voltage drop in the feeder is less.

• Power factor is higher.

• Supply is more reliable.

Where the null point of a uniformly loaded distributor feed at equal voltage at both ends lies at?

• Mid point

• Either end

• Two third distance from one end

• One fourth distance from one end

Which distribution system is energised by two or more generating stations or substations?

• Radial systems.

• Interconnected systems.

• Ring main systems.

• All of these

In the design of a distributor which of the following is the major consideration?

• Voltage drop

• Current carrying capacity

• Frequency

• KVA system

Why is a ring main distribution system preferred to a radial system?
1. Voltage drop in feed is more
2. Supply is reliable
3. Power factor is higher

• 2

• 2,3

• 1,2,3

• 1,2

For the figure shown, having a 2-wire dc system where mid point is earthed, having resistance of 20 ohms, with a power transmitted of 5 MW at the voltage level of 440 kV.
The power loss of the distribution system will be ___________

• 5165 W
  

• 515 kW

• 10330 W

• 2583 W

Which component in a single line diagram of a distribution substation represents the main incoming and outgoing circuits?

• Transformer

• Busbar

• Circuit Breaker

• Feeder

What is the main purpose of a feeder in a distribution system

• To generate power

• To distribute power from substations to consumers

• To step up voltage

• To protect against faults