Power plant ASA Exam Questions and
Answers
TURBINE
1.What are the two sections of a turbine engine? -
correct answer ✅The hot section and cold section
2.What are the two basic types of compressor that are used in
aircraft turbine engine? -
correct answer ✅Axial-flow and centrifugal
3.What is the purpose of the stators in an axial-flow compressor? -
correct answer ✅Convert velocity energy into pressure energy.
4.What are three types of combustors used on aircraft turbine
engines? -
correct answer ✅Can-type, annular-type, and can-annular-type.
5.How many igniters are there normally in an aircraft turbine
engine? -
correct answer ✅Two
6.What is the main purpose of the turbine nozzle in an aircraft
turbine engine? -
correct answer ✅Direct the hot gasses to the turbine wheel.
,Power plant ASA Exam Questions and
Answers
7. What is meant by a free-turbine turbo shaft engine? -
correct answer ✅The turbine engine that move two separate
turbine wheels-one move the compressor - one move the propeller
shaft.
8.Why do some axial-flow turbine engines have more than one set
of turbines and compressors? -
correct answer ✅For more Efficiency performance.
9.What kind of bearings are used to support the rotor shaft of an
aircraft turbine engine? -
correct answer ✅Ball bearings or roller bearings
OR: What types of bearings are generally found in reciprocating
engines. -
correct answer ✅Ball bearings or roller bearings.
10. What is meant by a turbofan engine? -
correct answer ✅First stage of compressor blades are bigger.
,Power plant ASA Exam Questions and
Answers
11.Where can you find the limits of repair allowed for the
compressor blades of an aircraft turbine engine? -
correct answer ✅Service Manual
12.Why is it important that a turbojet engine be allowed to cool
before it is shut down after it has been operated at a high power
setting? -
correct answer ✅To prevent seize the rotor
13.What is meant by a hung start in a turbine engine? -
correct answer ✅Ignition occurs with not enough engine
acceleration
14.What is meant by a hot start in a turbine engine? -
correct answer ✅Ignition occurs with high EGT.
15.What is meant by creep of the turbine blades? -
correct answer ✅Permanent elongation of the turbine blades
16.How is the compressor of a turbine engine cleaned? -
correct answer ✅Clear water, Special Detergent and no Fuel
, Power plant ASA Exam Questions and
Answers
17.Where is water injected into a turbine engine for cooling
purposes? -
correct answer ✅Compressor inlet and Diffuser Inlet
18.At what point in a turbine engine is the temperature the
highest? -
correct answer ✅At the inlet to the HPT (high-pressure turbine).
19.What is the function of the interconnect tubes between the cans
of a turbine engine that uses can-type combustors? -
correct answer ✅Allow the flame to travel around the cans
20.What are two types of thrust reversers that are used on turbojet
engines? -
correct answer ✅The mechanical blockage-type and the
aerodynamic blockage-type.
21.What is meant by trimming a turbojet engine? -
correct answer ✅Adjusting the fuel control to get the correct idling
and maximum-thrust RPM.
Answers
TURBINE
1.What are the two sections of a turbine engine? -
correct answer ✅The hot section and cold section
2.What are the two basic types of compressor that are used in
aircraft turbine engine? -
correct answer ✅Axial-flow and centrifugal
3.What is the purpose of the stators in an axial-flow compressor? -
correct answer ✅Convert velocity energy into pressure energy.
4.What are three types of combustors used on aircraft turbine
engines? -
correct answer ✅Can-type, annular-type, and can-annular-type.
5.How many igniters are there normally in an aircraft turbine
engine? -
correct answer ✅Two
6.What is the main purpose of the turbine nozzle in an aircraft
turbine engine? -
correct answer ✅Direct the hot gasses to the turbine wheel.
,Power plant ASA Exam Questions and
Answers
7. What is meant by a free-turbine turbo shaft engine? -
correct answer ✅The turbine engine that move two separate
turbine wheels-one move the compressor - one move the propeller
shaft.
8.Why do some axial-flow turbine engines have more than one set
of turbines and compressors? -
correct answer ✅For more Efficiency performance.
9.What kind of bearings are used to support the rotor shaft of an
aircraft turbine engine? -
correct answer ✅Ball bearings or roller bearings
OR: What types of bearings are generally found in reciprocating
engines. -
correct answer ✅Ball bearings or roller bearings.
10. What is meant by a turbofan engine? -
correct answer ✅First stage of compressor blades are bigger.
,Power plant ASA Exam Questions and
Answers
11.Where can you find the limits of repair allowed for the
compressor blades of an aircraft turbine engine? -
correct answer ✅Service Manual
12.Why is it important that a turbojet engine be allowed to cool
before it is shut down after it has been operated at a high power
setting? -
correct answer ✅To prevent seize the rotor
13.What is meant by a hung start in a turbine engine? -
correct answer ✅Ignition occurs with not enough engine
acceleration
14.What is meant by a hot start in a turbine engine? -
correct answer ✅Ignition occurs with high EGT.
15.What is meant by creep of the turbine blades? -
correct answer ✅Permanent elongation of the turbine blades
16.How is the compressor of a turbine engine cleaned? -
correct answer ✅Clear water, Special Detergent and no Fuel
, Power plant ASA Exam Questions and
Answers
17.Where is water injected into a turbine engine for cooling
purposes? -
correct answer ✅Compressor inlet and Diffuser Inlet
18.At what point in a turbine engine is the temperature the
highest? -
correct answer ✅At the inlet to the HPT (high-pressure turbine).
19.What is the function of the interconnect tubes between the cans
of a turbine engine that uses can-type combustors? -
correct answer ✅Allow the flame to travel around the cans
20.What are two types of thrust reversers that are used on turbojet
engines? -
correct answer ✅The mechanical blockage-type and the
aerodynamic blockage-type.
21.What is meant by trimming a turbojet engine? -
correct answer ✅Adjusting the fuel control to get the correct idling
and maximum-thrust RPM.
