Gas Power Plant MCQ

Gas power plant Electrical Engineering MCQ Questions with answers for Electrical Engineering exams, tests, job interviews, and papers.

A Gas Power plant uses air as a working fluid. A gas turbine is used as the prime mover for generating electrical energy.

A gas turbine power plant uses which fuel

A gas turbine power plant uses which fuel:

  1. Coal
  2. Natural Gas
  3. Kerosene
  4. Residual oil

Correct answer: 2. Natural gas

Traditionally the gas turbines operate on high calorific fuels e.g natural gas

A gas turbine power plant uses which cycle

A gas turbine power plant uses which cycle:

  1. Rankine cycle
  2. Brayton cycle
  3. Otto cycle
  4. Gibbs cycle

Correct answer: 2. Brayton cycle

The basic operation of the gas turbine is a Brayton cycle with air as the working fluid : atmospheric air flows through the compressor that brings it to higher pressure ; energy is then added by spraying fuel into the air and igniting it so that the combustion generates a high-temperature flow ; this high-temperature pressurized gas enters a turbine, producing a shaft work output in the process, used to drive the compressor ; the unused energy comes out in the exhaust gases that can be repurposed for external work, such as directly producing thrust in a turbojet engine, or rotating a second, independent turbine (known as a power turbine) that can be connected to a fan, propeller, or electrical generator.

Source: https://en.wikipedia.org/wiki/Gas_turbine

For the same capacity which one of the following is smaller in size

For the same capacity which one of the following is smaller in size:

  1. Gas turbine power plant
  2. Steam power plant
  3. Both are same
  4. Any of the above

Correct answer: 1. Gas turbine power plant


Thermal efficiency of open cycle gas turbine can be improved using

Thermal efficiency of open cycle gas turbine can be improved using:

  1. Reheating
  2. Regeneration
  3. Intercooling
  4. All of these

Correct answer: 3. Intercooling


Centrifugal compressors are used for

Centrifugal compressors are used for:

  1. Higher pressure ratio and lower flow rates
  2. Lower pressure ratio and Higher flow rates
  3. Higher pressure ratio and higher flow rates
  4. Lower pressure ratio and lower flow rates

Correct answer: 1. Higher pressure ratio and lower flow rates


In the case of 3700 kW the Centrifugal compressors in gas transmission applications have speed of around

In the case of 3700 kW, the Centrifugal compressors in gas transmission applications have speed of around:

  1. 2000 RPM
  2. 8000 RPM
  3. 10000 RPM
  4. 14000 RPM

Correct answer: 4. 14000 RPM


The major application of compressor

The major application of compressor:

  1. Decreases pressure of gas
  2. Increases pressure of gas
  3. Used for starting turbine
  4. Used for shutting turbine

Correct answer: 2. Increases pressure of gas

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