Multiple Choice Questions (MCQ) with Answers on Gas turbine power plants
Multiple Choice Questions (MCQ) with Answers on Gas turbine power plants
1-The major field(s) of application of gas turbine is (are)
- Aviation
- Oil and gas industry
- Marine propulsion
- All of the above
(Ans: d)
2-The following is (are) the limitation(s) of gas turbines.
- They are not self starting
- Higher rotor speeds
- Low efficiencies at part loads
- All of the above
(Ans: d)
3-The ratio of heat actually released by 1kg of fuel to heat that would be released by complete perfect combustion, is called
- Thermal efficiency
- Combustion efficiency
- Engine efficiency
- Compression efficiency
(Ans: b)
4-The percentage of total energy input appearing as net work output of the cycle
- Thermal efficiency
- Combustion efficiency
- Engine efficiency
- Compression efficiency
(Ans: a)
5-The following method(s) can be used to improve the thermal efficiency of open cycle gas turbine plant
- inter-cooling
- Reheating
- Regeneration
- All of the above
(Ans: d)
6-Which of the following is (are) used as starter for a gas turbine
- An Internal combustion engine
- A steam turbine
- An auxiliary electric motor
- All of the above
(Ans: d)
7-Gas turbine is shut down by
- Turning off starter
- Stopping the compressor
- Fuel is cut off from the combustor
- Any of the above
(Ans: c)
8-In gas turbine, intercooler is placed
- before low pressure compressor
- in between low pressure compressor and high pressure compressor
- in between high pressure compressor and turbine
- None of the above
(Ans: b)
9-In gas turbine, the function of Re-heater is to
- Heat inlet air
- Heat exhaust gases
- Heat air coming out of compressor
- Heat gases coming out of high pressure turbine
(Ans: d)
10-The ‘work ratio’ increases with
- increase in turbine inlet pressure
- decrease in compressor inlet temperature
- decrease in pressure ratio of the cycle
- all of the above
(Ans: d)
11-In the centrifugal compressor, total pressure varies
- directly as the speed ratio
- square of speed ratio
- cube of the speed ratio
- Any of the above
(Ans: b)
12-The efficiency of multistage compressor is _____ than a single stage.
- lower
- higher
- equal to
- Any of the above
(Ans: a)
13-In centrifugal compressor, power input varies as
- directly as the speed ratio
- the square of speed ratio
- the cube of the speed ratio
- Any of the above
(Ans: c)
14-In the _____ heat transfer takes place between the exhaust gases and cool air.
- Intercooler
- Re-heater
- Regenerator
- Compressor
(Ans: c)
15-In centrifugal compressor, the diffuser converts
- Kinetic energy into pressure energy
- Pressure energy into Kinetic energy
- Kinetic energy into Mechanical energy
- Mechanical energy into Kinetic energy
(Ans: a)