Question

In pump storage hydropower plant, the electrical machine is made to work alternately as generator and motor. the efficiency of the generator working at the same electrical power level is
a.greater than that as motor
b.equal to that as motor
c.less than that as motor
d.greater or less than that as motor depending on the type of machine

Answer 1

a.greater than that as motor is the answer

Answer 2

Answer:

c. less than that as motor is the correct option.

Explanation:

• Pumped storage hydropower (PSH) is a method of energy storage for hydroelectric power plants.
• Water is pumped from a lower elevation reservoir to a higher elevation and is used to store energy in the form of gravitational potential energy.
• The amount of energy stored in water is related to its volume and the altitude from which it falls.
• hence, option c. less than that as the motor is the correct answer.