Power System - I (3140914) MCQs

MCQs of Conventional Generation, Load Curves and Tariffs

Showing 291 to 300 out of 425 Questions
27 28 29 30 31 32
291.
For starting gas turbine, its rotor is usually motored upto
(a) 10% of turbine rated speed
(b) 25% of turbine rated speed
(c) Half of turbine rated speed
(d) Turbine rated speed
Answer:

Option (c)

292.
In comparison to diesel engines the gas turbines have maximum combustion pressure
(a) Less
(b) Same
(c) More
(d) Unpredictable
Answer:

Option (a)

293.
For the same cylinder size and speed which of the following engines will develop more power?
(a) Petrol engine
(b) Diesel engine
(c) Super charged engine
(d) Gas engine
Answer:

Option (c)

294.
Which of the following auxiliary consumes most of the power?
(a) compressor
(b) Fuel pump
(c) Combustion chamber
(d) Burner
Answer:

Option (a)

295.
Greater part of the power developed by the turbine is used in driving the compressor. It is around
(a) 75%
(b) 65%
(c) 45%
(d) 35%
Answer:

Option (b)

296.
The work ratio of closed cycle gas turbine power plant depends upon
(a) Only on pressure ratio
(b) Temperature ratio of the cycle and specific heat ratio
(c) Pressure ratio, temperature ratio and specific heat ratio
(d) Pressure ratio and specific heat ratio
Answer:

Option (c)

297.
Overall efficiency of gas turbine is
(a) Less than that of diesel cycle
(b) More than that of diesel cycle
(c) More than that of otto cycle
(d) Equal to that of rankine or carnot cycle
Answer:

Option (a)

298.
In comparison to diesel power plant the gas turbine power plant has
(a) Lower overall thermal efficiency
(b) Higher overall thermal efficiency
(c) Same overall thermal efficiency
(d) Unpredictable
Answer:

Option (a)

299.
Mechanical efficiency of a gas turbine in comparison to that of reciprocating IC engine is
(a) Lower
(b) Higher
(c) Same
(d) Unpredictable
Answer:

Option (b)

300.
Thermal efficiency of a gas turbine improves because of
(a) Reheating of gas after partial expansion
(b) Removing the heat from compressed air between the stages of compression
(c) Utilizing the heat of exhaust gases to heat the compressed air before it is sent to combustion chamber
(d) All of above
Answer:

Option (d)

Showing 291 to 300 out of 425 Questions
27 28 29 30 31 32