AMS 274 TURBINES FINAL
CERTIFICATION SCRIPT 2026
QUESTIONS WITH SOLUTIONS
GRADED A+
◍ Which engine instruments shift when anti-ice is switched on?.
Answer: EGT, EPR, Tachometer
◍ What is the typical EGT rise when anti-ice is switched on?.
Answer: 10 degrees celsius
◍ Which type of jet engine & compressor is figure A.
Answer: Turbofan axial flow dual spool
◍ Which type of jet engine & compressor is figure B.
Answer: Turboprop crentrifugal flow dual spool & triple shaft compressor
◍ Which type of jet engine & compressor is figure C.
Answer: Turbofan Axial flow triple spool
◍ Which type of jet engine & compressor is figure D.
Answer: Turboprop combination compressor (axial-centrifugal)
◍ Label 1-4 on figure A.
Answer: 1. N1 low pressure compressor 2. N2 high pressure compressor 3.
High pressure turbine4. Low pressure turbine
◍ When are engine icing conditions most prevalent?.
Answer: High-speed engine operation on the ground
◍ When can engine inlet ice form?.
Answer: Up to 40°F ambient temperature in relatively dry air and up to 45°F
in visibly moist air.
, ◍ What does an anti-ice bimetallic regulator valve do?.
Answer: Provides 500 degree F air at its max flow position at idle and 650
degree F air at its min flow position near takeoff.
◍ Label 5-8 on figure B.
Answer: 5. N1 Low pressure compressor 6. High pressure compressor 7.
High pressure turbine 7.5) low pressure turbine 8. N3 free power turbine
◍ What is used to reduce vicinity temperatures and eliminate the possibility of
fuel or oil coming in contact with the hot parts of the engine?.
Answer: Insulation blankets on the exhaust duct of gas turbine engines
◍ Label 9-14 on figure C.
Answer: 9. N1 Low pressure compressor10. Intermediate compressor11.
High pressure compressor 12. High pressure turbine 13. Intermediate turbine
14. Low pressure turbine
◍ What are insulation blankets typically composed of?.
Answer: Typically contains fiberglass as the low conductance material and
aluminum foil as the radiation shield
◍ What does FADEC stand for?.
Answer: Full Authority Digital Engine Control
◍ How is the FADEC/EEC cooled?.
Answer: Convection Cooling/Ram Air
◍ Label 15-17 on figure D.
Answer: 15. N116. N1 turbine 17. Free turbine
◍ In the event of a total power loss, how does a FADEC still operate?.
Answer: Integral Alternator
◍ If an engine is replaced, what EEC component must stay?.
Answer: EEC Programming Plug
◍ FADEC does not control...?.
Answer: Turbine Section Bleed Air
CERTIFICATION SCRIPT 2026
QUESTIONS WITH SOLUTIONS
GRADED A+
◍ Which engine instruments shift when anti-ice is switched on?.
Answer: EGT, EPR, Tachometer
◍ What is the typical EGT rise when anti-ice is switched on?.
Answer: 10 degrees celsius
◍ Which type of jet engine & compressor is figure A.
Answer: Turbofan axial flow dual spool
◍ Which type of jet engine & compressor is figure B.
Answer: Turboprop crentrifugal flow dual spool & triple shaft compressor
◍ Which type of jet engine & compressor is figure C.
Answer: Turbofan Axial flow triple spool
◍ Which type of jet engine & compressor is figure D.
Answer: Turboprop combination compressor (axial-centrifugal)
◍ Label 1-4 on figure A.
Answer: 1. N1 low pressure compressor 2. N2 high pressure compressor 3.
High pressure turbine4. Low pressure turbine
◍ When are engine icing conditions most prevalent?.
Answer: High-speed engine operation on the ground
◍ When can engine inlet ice form?.
Answer: Up to 40°F ambient temperature in relatively dry air and up to 45°F
in visibly moist air.
, ◍ What does an anti-ice bimetallic regulator valve do?.
Answer: Provides 500 degree F air at its max flow position at idle and 650
degree F air at its min flow position near takeoff.
◍ Label 5-8 on figure B.
Answer: 5. N1 Low pressure compressor 6. High pressure compressor 7.
High pressure turbine 7.5) low pressure turbine 8. N3 free power turbine
◍ What is used to reduce vicinity temperatures and eliminate the possibility of
fuel or oil coming in contact with the hot parts of the engine?.
Answer: Insulation blankets on the exhaust duct of gas turbine engines
◍ Label 9-14 on figure C.
Answer: 9. N1 Low pressure compressor10. Intermediate compressor11.
High pressure compressor 12. High pressure turbine 13. Intermediate turbine
14. Low pressure turbine
◍ What are insulation blankets typically composed of?.
Answer: Typically contains fiberglass as the low conductance material and
aluminum foil as the radiation shield
◍ What does FADEC stand for?.
Answer: Full Authority Digital Engine Control
◍ How is the FADEC/EEC cooled?.
Answer: Convection Cooling/Ram Air
◍ Label 15-17 on figure D.
Answer: 15. N116. N1 turbine 17. Free turbine
◍ In the event of a total power loss, how does a FADEC still operate?.
Answer: Integral Alternator
◍ If an engine is replaced, what EEC component must stay?.
Answer: EEC Programming Plug
◍ FADEC does not control...?.
Answer: Turbine Section Bleed Air
