3B2 C4 Exam Questions With Complete Solutions
A closed cycle gas turbine system:
a. Does not use a starting motor
b. Has lower pressure used in system
c. Will use the same working fluid over again
d. Must use a cooler before the regeneration
e. Has a lower initial cost than that of the open cycle gas turbine
Correct Answers C
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 turbine power to the output load
d. Used only with axial type compressors
e. Are not as efficient Correct Answers C
A gas turbine attempts to combine.
a. The simplicity of the steam turbine and the internal
combustion engine.
b. The advantage of the steam turbine and the internal
combustion engine.
c. The advantage of the steam turbine and the simplicity of the
internal combustion engine.
d. The simplicity of the steam turbine and the advantages of the
internal combustion engine.
e. All of the above. Correct Answers D
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 Correct Answers D
A gas turbine cycle is also known as:
a. The Current cycle.
b. The Joule cycle.
c. The Whittle cycle.
d. The Buchi cycle.
e. The Watt cycle. Correct Answers B
A radial or centrifugal compressor used with a gas turbine has
the following advantages:
1. Simple
2. More efficient
3. Strong
4. Short in length
a. 1, 2, 3
b. 1, 3, 4
c. 2, 3, 4
d. 1, 2, 4
e. 1, 2, 3, 4 Correct Answers B
Advantages of gas turbines intakes are:
1) Remove contaminants
2) Prevent damage from foreign objects
, 3) Allow addition of special cooling systems
4) Smooth air flow into the compressor
5) Decrease the velocity of the incoming air
a. 1, 2, 3, 4
b. 2, 3, 4, 5
c. 3, 4, 5, 1
d. 4, 5, 1, 2
e. 5, 1, 2, 3 Correct Answers A
Aero-derivative engines are engines that:
a. Are converted from an aircraft engine
b. Are heavier in construction than a jet engine
c. Are closer in design to industrial gas turbines
d. Are more rapid in their startup than jet engines
e. Use less power turbine blades Correct Answers A
An advantage of closed cycle is:
a. Cooling water lowers cost
b. Fuel is cheaper
c. Working fluid supports combustion
d. Pressures are lower so stress is lower on all the equipment
e. Complexity is less Correct Answers B
An increase in turbine inlet air temperature
__________________.
a. increases the work done by the turbine
b. decreases the amount of fuel used for the same output
A closed cycle gas turbine system:
a. Does not use a starting motor
b. Has lower pressure used in system
c. Will use the same working fluid over again
d. Must use a cooler before the regeneration
e. Has a lower initial cost than that of the open cycle gas turbine
Correct Answers C
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 turbine power to the output load
d. Used only with axial type compressors
e. Are not as efficient Correct Answers C
A gas turbine attempts to combine.
a. The simplicity of the steam turbine and the internal
combustion engine.
b. The advantage of the steam turbine and the internal
combustion engine.
c. The advantage of the steam turbine and the simplicity of the
internal combustion engine.
d. The simplicity of the steam turbine and the advantages of the
internal combustion engine.
e. All of the above. Correct Answers D
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 Correct Answers D
A gas turbine cycle is also known as:
a. The Current cycle.
b. The Joule cycle.
c. The Whittle cycle.
d. The Buchi cycle.
e. The Watt cycle. Correct Answers B
A radial or centrifugal compressor used with a gas turbine has
the following advantages:
1. Simple
2. More efficient
3. Strong
4. Short in length
a. 1, 2, 3
b. 1, 3, 4
c. 2, 3, 4
d. 1, 2, 4
e. 1, 2, 3, 4 Correct Answers B
Advantages of gas turbines intakes are:
1) Remove contaminants
2) Prevent damage from foreign objects
, 3) Allow addition of special cooling systems
4) Smooth air flow into the compressor
5) Decrease the velocity of the incoming air
a. 1, 2, 3, 4
b. 2, 3, 4, 5
c. 3, 4, 5, 1
d. 4, 5, 1, 2
e. 5, 1, 2, 3 Correct Answers A
Aero-derivative engines are engines that:
a. Are converted from an aircraft engine
b. Are heavier in construction than a jet engine
c. Are closer in design to industrial gas turbines
d. Are more rapid in their startup than jet engines
e. Use less power turbine blades Correct Answers A
An advantage of closed cycle is:
a. Cooling water lowers cost
b. Fuel is cheaper
c. Working fluid supports combustion
d. Pressures are lower so stress is lower on all the equipment
e. Complexity is less Correct Answers B
An increase in turbine inlet air temperature
__________________.
a. increases the work done by the turbine
b. decreases the amount of fuel used for the same output
