AMS 274 TURBINES FINAL ASSESSMENT TEST
2026 TESTED QUESTIONS WITH FULL
SOLUTION GRADED A+
◉ What is true about the cold and hot sections of a gas turbine
engine? Answer: Neither statement 1 nor 2 is true.
◉ What is required for welding and straightening turbine engine
rotating airfoils? Answer: Special equipment.
◉ What materials are not suitable for marking turbine engine
components exposed to high temperatures? Answer: Wax or grease
pencil and graphite lead pencil.
◉ Who establishes mandatory replacement times for critical
components of turbine engines? Answer: The engine manufacturer.
◉ What type of seals are usually used with turbine engine main
bearing oil? Answer: Labyrinth and/or carbon rubbing.
◉ How does a dual axial-flow compressor improve turbojet engine
efficiency? Answer: Higher compression ratios can be obtained.
,◉ What are the three types of turbine blades? Answer: Impulse,
reaction, and impulse-reaction.
◉ Which statements are true regarding aircraft engine propulsion?
Answer: Statements 1 and 2 are true.
◉ What is an advantage of the axial-flow compressor? Answer: High
peak efficiency.
◉ What is one purpose of the stator blades in the compressor
section of a turbine engine? Answer: Control the direction of the
airflow.
◉ What is the purpose of the diffuser section in a turbine engine?
Answer: To increase pressure and reduce velocity.
◉ Where do stress rupture cracks usually appear on turbine blades?
Answer: Across the leading or trailing edge at a right angle to the
edge length.
◉ In which type of turbine engine combustion chamber is the case
and liner removed and installed as one unit during routine
maintenance? Answer: Can.
, ◉ Where is the diffuser section of a jet engine located? Answer:
Between the compressor section and the burner section.
◉ What should be suspected when the leading edge of a first-stage
turbine blade is found to have stress rupture cracks? Answer:
Overtemperature condition.
◉ Why are turbine blades generally more susceptible to operating
damage than compressor blades? Answer: Exposure to high
temperatures.
◉ What is the ultimate limiting factor of turbine engine operation?
Answer: Turbine inlet temperature.
◉ What can result from the recurrent ingestion of dust or other fine
airborne particulates into a turbine engine? Answer: Erosion
damage to the compressor and turbine sections.
◉ Which engine variable is the most critical during turbine engine
operation? Answer: Turbine inlet temperature.
◉ What reduces blade vibration and improves airflow
characteristics in gas turbines? Answer: Shrouded turbine rotor
blades.
2026 TESTED QUESTIONS WITH FULL
SOLUTION GRADED A+
◉ What is true about the cold and hot sections of a gas turbine
engine? Answer: Neither statement 1 nor 2 is true.
◉ What is required for welding and straightening turbine engine
rotating airfoils? Answer: Special equipment.
◉ What materials are not suitable for marking turbine engine
components exposed to high temperatures? Answer: Wax or grease
pencil and graphite lead pencil.
◉ Who establishes mandatory replacement times for critical
components of turbine engines? Answer: The engine manufacturer.
◉ What type of seals are usually used with turbine engine main
bearing oil? Answer: Labyrinth and/or carbon rubbing.
◉ How does a dual axial-flow compressor improve turbojet engine
efficiency? Answer: Higher compression ratios can be obtained.
,◉ What are the three types of turbine blades? Answer: Impulse,
reaction, and impulse-reaction.
◉ Which statements are true regarding aircraft engine propulsion?
Answer: Statements 1 and 2 are true.
◉ What is an advantage of the axial-flow compressor? Answer: High
peak efficiency.
◉ What is one purpose of the stator blades in the compressor
section of a turbine engine? Answer: Control the direction of the
airflow.
◉ What is the purpose of the diffuser section in a turbine engine?
Answer: To increase pressure and reduce velocity.
◉ Where do stress rupture cracks usually appear on turbine blades?
Answer: Across the leading or trailing edge at a right angle to the
edge length.
◉ In which type of turbine engine combustion chamber is the case
and liner removed and installed as one unit during routine
maintenance? Answer: Can.
, ◉ Where is the diffuser section of a jet engine located? Answer:
Between the compressor section and the burner section.
◉ What should be suspected when the leading edge of a first-stage
turbine blade is found to have stress rupture cracks? Answer:
Overtemperature condition.
◉ Why are turbine blades generally more susceptible to operating
damage than compressor blades? Answer: Exposure to high
temperatures.
◉ What is the ultimate limiting factor of turbine engine operation?
Answer: Turbine inlet temperature.
◉ What can result from the recurrent ingestion of dust or other fine
airborne particulates into a turbine engine? Answer: Erosion
damage to the compressor and turbine sections.
◉ Which engine variable is the most critical during turbine engine
operation? Answer: Turbine inlet temperature.
◉ What reduces blade vibration and improves airflow
characteristics in gas turbines? Answer: Shrouded turbine rotor
blades.
