Power Engineering 3B2 ch4 (Gas Turbine Principles and
Designs) Questions With Complete Solutions
The purpose of a regenerator in a gas turbine is:
a. To clean the exhaust gases
b. To improve the efficiency of the turbine
c. To decrease the temperature in the combustion chamber
d. To raise the air temperature before compression
e. To decrease the air temperature after compressio
B
The regenerator in a gas turbine cycle is located:
a. Between the power and load turbine
b. Between the turbine outlet and compressor inlet
c. Between the compressor and combustor
d. Between the combustor and turbine
e. Between the power turbine and generator
C
The regenerator of a gas turbine cycle is a:
a. Second combustor
b. Heat exchanger
c. Vessel used to transfer heat from the exhaust gas to the
working fluid before compression occurs
,d. Increase the pressure of the working fluid in the system
e. Increase the temperature of the combustor's outlet
B
A gas turbine air compressor with an intercooler:
a. Has the intercooler located after the compressor
b. Increases the volume of air being supplied
c. Allows more output at the turbine
d. Used only with axial type compressors
e. Are not as efficient
C
The combustion chamber of a gas turbine:
a. Increases the pressure of the compressed air
b. Burns fuel with excess air
c. Is located between the load turbine and the compressor
turbine
d. Is always of the multiple burner type
e. Utilizes 70 % of the air supplied by the compressor for actual
combustion process
B
A gas turbine combustion chamber requires:
a. A cooling water jacket on the inner canister
b. A vacuum breaker
c. A safety pressure relief device
,d. A high voltage ignition plug for initial ignition
e. An annual hydrostatic test
D
The capacity of a gas turbine will increase in cold weather
because:
a. High grades of fuel oil burn better at cooler temperatures
b. The density of the air is increased
c. The volume if the air will increase
d. The temperature drop throughout the cycle will be less
e. The atmospheric pressure will increase
B
Which of the following are disadvantages of a gas turbine?
1) Complicated design
2) High manufacturing costs
3) Slow response to load change
4) Low efficiency
5) Suitable for low power applications
a. 1, 3, 5
b. 2, 3, 4
c. 3, 4, 5
d. 1, 4, 5
e. 1, 2, 3
E
, The term peaking gas turbine refers to:
a. Gas turbines that produce max power
b. Gas turbines used with peak horsepower
c. Gas turbines used during major outages
d. Gas turbines used every day
e. Gas turbines used in heavy load situations
E
Industrial gas turbines compared to aero-derivative turbines are:
a. Light weight
b. Rapid load changers
c. Less efficient
d. Use all different fuels
e. Fast starting
D
In simple gas turbines the air is compressed to the following
maximum pressures:
a. 2000 kPa
b. 2500 kPa
c. 3000 kPa
d. 3500 kPa
e. 4000 kPa
C
Designs) Questions With Complete Solutions
The purpose of a regenerator in a gas turbine is:
a. To clean the exhaust gases
b. To improve the efficiency of the turbine
c. To decrease the temperature in the combustion chamber
d. To raise the air temperature before compression
e. To decrease the air temperature after compressio
B
The regenerator in a gas turbine cycle is located:
a. Between the power and load turbine
b. Between the turbine outlet and compressor inlet
c. Between the compressor and combustor
d. Between the combustor and turbine
e. Between the power turbine and generator
C
The regenerator of a gas turbine cycle is a:
a. Second combustor
b. Heat exchanger
c. Vessel used to transfer heat from the exhaust gas to the
working fluid before compression occurs
,d. Increase the pressure of the working fluid in the system
e. Increase the temperature of the combustor's outlet
B
A gas turbine air compressor with an intercooler:
a. Has the intercooler located after the compressor
b. Increases the volume of air being supplied
c. Allows more output at the turbine
d. Used only with axial type compressors
e. Are not as efficient
C
The combustion chamber of a gas turbine:
a. Increases the pressure of the compressed air
b. Burns fuel with excess air
c. Is located between the load turbine and the compressor
turbine
d. Is always of the multiple burner type
e. Utilizes 70 % of the air supplied by the compressor for actual
combustion process
B
A gas turbine combustion chamber requires:
a. A cooling water jacket on the inner canister
b. A vacuum breaker
c. A safety pressure relief device
,d. A high voltage ignition plug for initial ignition
e. An annual hydrostatic test
D
The capacity of a gas turbine will increase in cold weather
because:
a. High grades of fuel oil burn better at cooler temperatures
b. The density of the air is increased
c. The volume if the air will increase
d. The temperature drop throughout the cycle will be less
e. The atmospheric pressure will increase
B
Which of the following are disadvantages of a gas turbine?
1) Complicated design
2) High manufacturing costs
3) Slow response to load change
4) Low efficiency
5) Suitable for low power applications
a. 1, 3, 5
b. 2, 3, 4
c. 3, 4, 5
d. 1, 4, 5
e. 1, 2, 3
E
, The term peaking gas turbine refers to:
a. Gas turbines that produce max power
b. Gas turbines used with peak horsepower
c. Gas turbines used during major outages
d. Gas turbines used every day
e. Gas turbines used in heavy load situations
E
Industrial gas turbines compared to aero-derivative turbines are:
a. Light weight
b. Rapid load changers
c. Less efficient
d. Use all different fuels
e. Fast starting
D
In simple gas turbines the air is compressed to the following
maximum pressures:
a. 2000 kPa
b. 2500 kPa
c. 3000 kPa
d. 3500 kPa
e. 4000 kPa
C
