Power System MCQs Part 6

Power System MCQs Part 6

The reactance relay is

The reactance relay is

1. Voltage restrained directional relay
2. Voltage restrained over-current relay
3. Directional restrained over-current relay
4. None of the above

Correct answer: 3. Directional restrained over-current relay

I and T are the line current and the torque respectively when DOL starter is used, these quantities when Y/Δ starter is used, are

I and T are the line current and the torque respectively when DOL starter is used, these quantities when Y/Δ starter is used, are:

1. 1/√3, T/ 3
2. 1/3, T/ √3
3. 1/√2, T/ √2
4. 1/2, T/4

Correct answer: 1. 1/√3, T/ 3

Bonding the cable will result so as

Bonding the cable will result so as

1. To increase the effective resistance and inductance
2. To decrease the effective resistance and inductance
3. To decrease the effective resistance but increase the inductance
4. To increase the effective resistance but reduce inductance

Correct answer: 4. To increase the effective resistance but reduce inductance

The presence of earth in case of overhead lines

The presence of earth in case of overhead lines

1. Decreases the capacitance
2. Decreases the inductance
3. Increases the capacitance
4. Increases the inductance

Correct answer: 3. Increases the capacitance

In order to have lower cost of generation of electricity

In order to have lower cost of generation of electricity

1. The load factor and diversity factor should be low
2. The load factor and diversity factors should be high
3. The load factor should be low but diversity factor should be high
4. The load factor should be high but diversity factor low

Correct answer: 2. The load factor and diversity factors should be high