Power Plant Engineering (2171910) MCQs

MCQs of Gas Turbine

Showing 21 to 30 out of 52 Questions
1 2 3 4 5 6
21.

The high air-fuel ratio in gas turbines

(a)

increases power output
(b)

improves thermal efficiency
(c)

reduces exhaust temperature
(d)

do not damage turbine blades
Answer:

Option (c)

22.

Which of the following is smallest and lightest for generating a given amount of power?

(a)

Gas turbine plant   
(b)

Petrol engine
(c)

Diesel engine
(d)

Solar plant
Answer:

Option (a)

23.

An open cycle gas turbine works on

(a)

Brayton cycle
(b)

Carnot cycle
(c)

Rankine cycle
(d)

Joule cycle
Answer:

Option (a)

24.

A closed-cycle gas turbine consists of a

(a)

compressor
(b)

heating chamber
(c)

cooling chamber
(d)

all of these
Answer:

Option (d)

25.

A closed-cycle gas turbine works on

(a)

Carnot cycle
(b)

Rankine cycle
(c)

Ericsson cycle
(d)

Joule cycle
Answer:

Option (d)

26.

The gas in the cooling chamber of a closed cycle gas turbine is cooled at

(a)

constant volume
(b)

constant temperature
(c)

constant pressure
(d)

none of these
Answer:

Option (c)

27.

In a closed cycle gas turbine, the air is compressed

(a)

isothermally
(b)

polytropically
(c)

isentropically
(d)

none of these
Answer:

Option (c)

28.

The pressure ratio of open cycle gas turbine compared to the closed-cycle gas turbine of the same h.p is

(a)

low
(b)

high
(c)

same
(d)

low/high depending on make and type
Answer:

Option (a)

29.

The ideal efficiency of a simple gas turbine cycle depends on

(a)

pressure  ratio
(b)

maximum cycle temperature
(c)

minimum cycle temperature
(d)

all of these
Answer:

Option (a)

30.

The output of a gas turbine is 300 KW and its efficiency is 20 percent, the heat supplied is

(a)

6000 KW
(b)

15 KW
(c)

600 KW
(d)

150 KW
Answer:

Option (b)

Showing 21 to 30 out of 52 Questions
1 2 3 4 5 6