ASA Powerplant Exam Questions with Correct Answers 100% Verified By Experts| Latest
Update Guaranteed Success
Grinding the valves of a reciprocating engine to a feather edge is likely to result in
preignition and burned valves.
The actual power delivered to the propeller of an aircraft engine is called brake horsepower.
Some cylinder barrels are hardened by nitriding.
On which part of the cylinder walls of a normally operating engine will the greatest amount of
wear occur? Near the top of the cylinder.
During overhaul, reciprocating engine exhaust valves are checked for stretch with a contour
or radius gauge.
During overhaul, the disassembled parts of an engine are usually degreased with some form of
mineral spirits solvent rather than water-mixed degreasers primarily because water-mixed
degreaser residues may cause engine oil contamination in the overhauled engine.
How is proper end-gap clearance on new piston rings assured during the overhaul of an engine?
By placing the rings in the cylinder and measuring the end-gap with a feeler gauge.
When cleaning aluminum and magnesium engine parts, it is inadvisable to soak them in
solutions containing soap because some of the soap will become impregnated in the surface
of the material and subsequently cause engine oil contamination and foaming.
What is the purpose of a power check on a reciprocating engine? To determine satisfactory
performance.
,Which of the following would indicate a general weak-engine condition when operated with a
fixed-pitch propeller or test club? Lower than normal static RPM, full throttle operation.
What is required by 14 CFR Part 43 Appendix D when performing an annual/100 hour
inspection on a reciprocating engine aircraft? Cylinder compression check.
After spark plugs from an opposed engine have been serviced, in what position should they be
reinstalled? Next in firing order to the one from which they were removed and swapped
bottom to top.
As the pressure is applied during a reciprocating engine compression check using a differential
pressure tester, what would a movement of the propeller in the direction of engine rotation
indicate? The piston was positioned past top dead center.
During routine inspection of a reciprocating engine, a deposit of small, bright, metallic particles
which do not cling to the magnetic drain plug is discovered in the oil sump and on the surface of
the oil filter. This condition may be a result of abnormal plain type bearing wear and is cause
for further investigation.
If metallic particles are found in the oil filter during an inspection, the cause should be
identified and corrected before the aircraft is released for flight.
What special procedure must be followed when adjusting the valves of an engine equipped
with a floating cam ring? Eliminate cam bearing clearance when making valve adjustment.
Engine crankshaft runout is usually checked during engine overhaul and after a "prop strike"
or sudden engine stoppage.
An engine misses in both the right and left positions of the magneto switch. The quickest
method for locating the trouble is to check for one or more cold cylinders.
,A hissing sound from the exhaust stacks when the propeller is being pulled through manually
indicates exhaust valve blow-by.
If an engine cylinder is to be removed, at what position in the cylinder should the piston be?
Top dead center.
What is the best indication of worn valve guides? High oil consumption.
(1) Preignition is caused by improper ignition timing.
(2) Detonation occurs when an area of the combustion chamber becomes incandescent and
ignites the air-fuel mixture in advance of normal timed ignition. neither 1 nor 2 is true.
Which of the following engine servicing operations generally requires engine pre-oiling prior to
starting the engine? Engine installation.
During the inspection of an engine control system in which push-pull control rods are used, the
threaded rod ends should be checked for the amount of thread engagement by means of
the inspection holes.
Which of the following conditions would most likely lead to detonation? Use of fuel with too
low an octane rating.
How may it be determined that a reciprocating engine with a dry sump is pre-oiled sufficiently?
Oil will flow from the engine return line or indicator port.
What could cause excessive pressure buildup in the crankcase of a reciprocating engine?
Plugged crankcase breather.
If air is heard coming from the crankcase breather or oil filler during a differential compression
check, what is this an indication of? Piston ring leakage.
, One cause of afterfiring in an aircraft engine is an excessively rich mixture.
During overhaul of an engine, a first step of inspection on a crankshaft should be perform a
runout check.
At what point in an axial-flow turbojet engine will the highest gas pressures occur? At the
compressor outlet.
The abbreviation P17 used in turbine engine terminology means the total pressure at station
7.
What turbine engine section provides for proper mixing of the fuel and air? Combustion
section.
Where is the highest gas pressure in a turbojet engine? In the entrance of the burner
section.
When starting a turbine engine, a hot start is indicated if the exhaust gas temperature
exceeds specified limits.
What are the 2 basic elements of the turbine section in a turbine engine? Stator and Rotor.
How does a dual axial-flow compressor improve the efficiency of a turbojet engine? Higher
compression ratios can be obtained.
Which statement is true regarding aircraft engine propulsion? An engine driven propeller
imparts a relatively small amount of acceleration to a large mass of air.
Update Guaranteed Success
Grinding the valves of a reciprocating engine to a feather edge is likely to result in
preignition and burned valves.
The actual power delivered to the propeller of an aircraft engine is called brake horsepower.
Some cylinder barrels are hardened by nitriding.
On which part of the cylinder walls of a normally operating engine will the greatest amount of
wear occur? Near the top of the cylinder.
During overhaul, reciprocating engine exhaust valves are checked for stretch with a contour
or radius gauge.
During overhaul, the disassembled parts of an engine are usually degreased with some form of
mineral spirits solvent rather than water-mixed degreasers primarily because water-mixed
degreaser residues may cause engine oil contamination in the overhauled engine.
How is proper end-gap clearance on new piston rings assured during the overhaul of an engine?
By placing the rings in the cylinder and measuring the end-gap with a feeler gauge.
When cleaning aluminum and magnesium engine parts, it is inadvisable to soak them in
solutions containing soap because some of the soap will become impregnated in the surface
of the material and subsequently cause engine oil contamination and foaming.
What is the purpose of a power check on a reciprocating engine? To determine satisfactory
performance.
,Which of the following would indicate a general weak-engine condition when operated with a
fixed-pitch propeller or test club? Lower than normal static RPM, full throttle operation.
What is required by 14 CFR Part 43 Appendix D when performing an annual/100 hour
inspection on a reciprocating engine aircraft? Cylinder compression check.
After spark plugs from an opposed engine have been serviced, in what position should they be
reinstalled? Next in firing order to the one from which they were removed and swapped
bottom to top.
As the pressure is applied during a reciprocating engine compression check using a differential
pressure tester, what would a movement of the propeller in the direction of engine rotation
indicate? The piston was positioned past top dead center.
During routine inspection of a reciprocating engine, a deposit of small, bright, metallic particles
which do not cling to the magnetic drain plug is discovered in the oil sump and on the surface of
the oil filter. This condition may be a result of abnormal plain type bearing wear and is cause
for further investigation.
If metallic particles are found in the oil filter during an inspection, the cause should be
identified and corrected before the aircraft is released for flight.
What special procedure must be followed when adjusting the valves of an engine equipped
with a floating cam ring? Eliminate cam bearing clearance when making valve adjustment.
Engine crankshaft runout is usually checked during engine overhaul and after a "prop strike"
or sudden engine stoppage.
An engine misses in both the right and left positions of the magneto switch. The quickest
method for locating the trouble is to check for one or more cold cylinders.
,A hissing sound from the exhaust stacks when the propeller is being pulled through manually
indicates exhaust valve blow-by.
If an engine cylinder is to be removed, at what position in the cylinder should the piston be?
Top dead center.
What is the best indication of worn valve guides? High oil consumption.
(1) Preignition is caused by improper ignition timing.
(2) Detonation occurs when an area of the combustion chamber becomes incandescent and
ignites the air-fuel mixture in advance of normal timed ignition. neither 1 nor 2 is true.
Which of the following engine servicing operations generally requires engine pre-oiling prior to
starting the engine? Engine installation.
During the inspection of an engine control system in which push-pull control rods are used, the
threaded rod ends should be checked for the amount of thread engagement by means of
the inspection holes.
Which of the following conditions would most likely lead to detonation? Use of fuel with too
low an octane rating.
How may it be determined that a reciprocating engine with a dry sump is pre-oiled sufficiently?
Oil will flow from the engine return line or indicator port.
What could cause excessive pressure buildup in the crankcase of a reciprocating engine?
Plugged crankcase breather.
If air is heard coming from the crankcase breather or oil filler during a differential compression
check, what is this an indication of? Piston ring leakage.
, One cause of afterfiring in an aircraft engine is an excessively rich mixture.
During overhaul of an engine, a first step of inspection on a crankshaft should be perform a
runout check.
At what point in an axial-flow turbojet engine will the highest gas pressures occur? At the
compressor outlet.
The abbreviation P17 used in turbine engine terminology means the total pressure at station
7.
What turbine engine section provides for proper mixing of the fuel and air? Combustion
section.
Where is the highest gas pressure in a turbojet engine? In the entrance of the burner
section.
When starting a turbine engine, a hot start is indicated if the exhaust gas temperature
exceeds specified limits.
What are the 2 basic elements of the turbine section in a turbine engine? Stator and Rotor.
How does a dual axial-flow compressor improve the efficiency of a turbojet engine? Higher
compression ratios can be obtained.
Which statement is true regarding aircraft engine propulsion? An engine driven propeller
imparts a relatively small amount of acceleration to a large mass of air.
