POWER ENGINEERING 3B2 - CHAPTER
5 EXAM QUESTIONS AND ANSWERS.
VERIFIED 2026.
Lube oil systems provide two basic functions.
a. Filtration and antifriction.
b. Lubricating sliding surfaces in the bearings and cool the bearings.
c. An adequate supply of oil to machinery and cooling machine parts.
d. Filtration and lubricate sliding surfaces.
e. Vibration dampening and cooling the bearings. - ANS B
All major oil systems consist of what basic components?
1) An oil reservoir to ensure an adequate supply of oil
2) Filters to ensure the oil is clean
3) Pumps to provide pressure
4) Coolers to ensure oil temperatures are kept within operating limits
5) Protective, monitoring and control devices
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,a. 1, 2, 3, 4
b. 1, 2, 5
c. 1, 2, 3, 4, 5
d. 1, 5
e. 5 - ANS C
Gas turbines use what two different types of bearings?
1) Antifriction (roller and/or ball) bearings
2) Radial (journal or tilt-pad) bearings
3) Axial (spherical) bearings
4) Take-up (frame) bearings
5) Swing (levered) bearings
a. 1, 4
b. 1, 2
c. 1, 3
d. 2, 4
e. 4, 5 - ANS B
Why is natural gas the best fuel for a gas turbines?
a. It promotes the most efficient combustion and produces the lowest environmental emissions.
b. It is less expensive than other fuel sources.
c. It has the highest efficiency of combustion.
d. It has less contaminants as compared to other fuels sources.
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,e. It is a lower explosion risk than other fuels. - ANS A
Routine maintenance on a gas turbine should involve checking for fuel leaks on a __________
basis.
a. yearly
b. monthly
c. weekly
d. daily
e. hourly - ANS D
An essential auxiliary in a gas turbine installation is:
a. A generator
b. A reheater
c. A starting motor
d. An air heater
e. A water pump - ANS C
Introducing warm air into the gas turbine intake as a result of an anti-icing system will?
a. Reduce the capacity of the unit, because warm air is less dense than cold air.
b. Form ice in the air intake.
c. Cause major damage resulting in catastrophic destruction of the compressor section blading.
d. Bleed air from the compressor.
e. Increase hot turbine exhaust. - ANS A
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, What is the final step in the sequence of starting a Gas Turbine?
a. Preparation for startup
b. Loading
c. Warmup
d. Crank and lightoff
e. Start initiation - ANS B
What is the first step in the normal shutdown of a gas turbine?
a. Reduce the speed to idle so the gas turbine can cool down.
b. Open the breaker that connects the generator to the power system.
c. Close the fuel valve.
d. Stop the rotor.
e. Stop the lube oil system. - ANS A
In order to keep the gas pass of a gas turbine clean the following must be done:
1) Inspect and clean air intake filters
2) Water washing of compressor blades
3) Inspect and clean air intake ducts
4) Good quality fuel must be used
a. 1, 2
b. 1, 3
4 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
5 EXAM QUESTIONS AND ANSWERS.
VERIFIED 2026.
Lube oil systems provide two basic functions.
a. Filtration and antifriction.
b. Lubricating sliding surfaces in the bearings and cool the bearings.
c. An adequate supply of oil to machinery and cooling machine parts.
d. Filtration and lubricate sliding surfaces.
e. Vibration dampening and cooling the bearings. - ANS B
All major oil systems consist of what basic components?
1) An oil reservoir to ensure an adequate supply of oil
2) Filters to ensure the oil is clean
3) Pumps to provide pressure
4) Coolers to ensure oil temperatures are kept within operating limits
5) Protective, monitoring and control devices
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,a. 1, 2, 3, 4
b. 1, 2, 5
c. 1, 2, 3, 4, 5
d. 1, 5
e. 5 - ANS C
Gas turbines use what two different types of bearings?
1) Antifriction (roller and/or ball) bearings
2) Radial (journal or tilt-pad) bearings
3) Axial (spherical) bearings
4) Take-up (frame) bearings
5) Swing (levered) bearings
a. 1, 4
b. 1, 2
c. 1, 3
d. 2, 4
e. 4, 5 - ANS B
Why is natural gas the best fuel for a gas turbines?
a. It promotes the most efficient combustion and produces the lowest environmental emissions.
b. It is less expensive than other fuel sources.
c. It has the highest efficiency of combustion.
d. It has less contaminants as compared to other fuels sources.
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,e. It is a lower explosion risk than other fuels. - ANS A
Routine maintenance on a gas turbine should involve checking for fuel leaks on a __________
basis.
a. yearly
b. monthly
c. weekly
d. daily
e. hourly - ANS D
An essential auxiliary in a gas turbine installation is:
a. A generator
b. A reheater
c. A starting motor
d. An air heater
e. A water pump - ANS C
Introducing warm air into the gas turbine intake as a result of an anti-icing system will?
a. Reduce the capacity of the unit, because warm air is less dense than cold air.
b. Form ice in the air intake.
c. Cause major damage resulting in catastrophic destruction of the compressor section blading.
d. Bleed air from the compressor.
e. Increase hot turbine exhaust. - ANS A
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, What is the final step in the sequence of starting a Gas Turbine?
a. Preparation for startup
b. Loading
c. Warmup
d. Crank and lightoff
e. Start initiation - ANS B
What is the first step in the normal shutdown of a gas turbine?
a. Reduce the speed to idle so the gas turbine can cool down.
b. Open the breaker that connects the generator to the power system.
c. Close the fuel valve.
d. Stop the rotor.
e. Stop the lube oil system. - ANS A
In order to keep the gas pass of a gas turbine clean the following must be done:
1) Inspect and clean air intake filters
2) Water washing of compressor blades
3) Inspect and clean air intake ducts
4) Good quality fuel must be used
a. 1, 2
b. 1, 3
4 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
