Power Systems Objective Questions & Answers – Set 7
Power Systems Objective Questions & Answers
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Which of the following statements is/are true?
Correct!
Wrong!

Which of the following materials is/are used as moderators?
Correct!
Wrong!

A power station has a maximum demand of 15000 kW. The annual load factor is 50% and plant capacity factor is 40%. What is the reserve capacity of the plant?
Correct!
Wrong!

Advantages of pumped storage plants is/are
Correct!
Wrong!

A power station plant load factor is defined as the ratio of
Correct!
Wrong!

What is the approximate efficiency of a normal thermal power station?
Correct!
Wrong!

In coal fired thermal power stations, what are the electrostatic precipitators used for?
Correct!
Wrong!

A thermal generating station has an installed capacity of 15 MW and supplies a daily load of 10 MW for 12 hours and 5 MW for remaining 12 hours. If the load factor is 0.8. Find the reserve capacity of the station?
Correct!
Wrong!

When a pumped storage power plant is operated in conjunction with a steam power plant
Correct!
Wrong!

A power station has a maximum demand of 15 MW. The plant capacity is 20 MW. Find the reserve capacity of the plant?
Correct!
Wrong!

Pumped storage plant is a
Correct!
Wrong!

The water from a catchment is 60*10^{6} cu m annually and hydro station has head of 40 m. Assuming ideal generator and turbine, the power that can be theoretically generated is
Correct!
Wrong!

The daily energy produced in thermal power station is 720 MWh at a load factor of 0.6. What is the maximum demand of the station?
Correct!
Wrong!

One million cubic meters of water is stored in a reservoir feeding a water turbine. The density of water is 993 kg/mÂ³. If the centre of mass of water is 50 meters above the turbine and losses are negligible, the energy produced by that volume of water is
Correct!
Wrong!

A thermal generating station has an installed capacity of 15 MW and supplies a daily load of 10 MW for 12 hours and 5 MW for remaining 12 hours. The plant capacity factor for the station is
Correct!
Wrong!

In an interconnected power system, the most suitable power plant to meet the peak load condition is
Correct!
Wrong!

A generated station has a maximum demand of 30 MW, a load factor of 60% and a plant capacity factor of 50%. The reserve capacity of the plant is
Correct!
Wrong!

In nuclear power plants which material is/are used as coolant?
Correct!
Wrong!

A coal fired steam power station working at a plant factor of 80% has one 500 MW generating unit. If the heat content of coal is 2 kWh/kg, the overall plant efficiency is 40% and a train load of coal is 2000 metric tons, then the number of trains required daily for the plant is
Correct!
Wrong!

Which of the following power stations is mainly used to cover peak load on the system?
Correct!
Wrong!

A power generating station has a maximum demand of 1000 MW. The annual load factor is 75% and plant capacity factor is 60%. Calculate the reserve capacity?
Correct!
Wrong!

Which of the following plants is/are base load plants
Correct!
Wrong!

Which of the following statements is/are true?
Correct!
Wrong!

The maximum efficiency of modern coal fired steam steam raising thermal power plants is restricted to about 0.35( a low value), mainly because of
Correct!
Wrong!

The maximum demand of a consumer is 2 kW and corresponding daily energy consumption is 30 units. What is the corresponding load factor?
Correct!
Wrong!

Taking the density of water to be 1000 kg/mÂ³, how much power would be developed by a hydro electric generator unit, assume 100% efficiency, with 1 m head and 1 mÂ³/s discharge?
Correct!
Wrong!

Which of the following statements is/are true?
Correct!
Wrong!

A Pelton wheel turbine having a rated speed of 300 rpm is connected to an alternator to produce power at 50 Hz. The number of poles required in the alternator is
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Wrong!

For harnessing low variable water heads, the suitable hydraulic turbine with reaction and adjustable vanes runners is
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Wrong!

On which one of the following cycles does a modern steam power plant work?