Powerplant (Jeppeson) Questions And
Answers
What procedure should be followed when valve blow by is
indicated by a hissing sound on a reciprocating engine? -
correct answer ✅Perform a compression test to find the faulty
chamber
what is the running valve clearance on an engine equipped with
hydraulic valve lifters -
correct answer ✅zero
what type of check can be made to locate a cold cylinder in a twin
row radial engine? -
correct answer ✅a cold cylinder check
what factors about the condition of an engine can be learned by
studying the results of a compression check? -
correct answer ✅it determines if the valves, piston rings and
pistons are adequately sealing
what should be done to repair a loose stud in an engine crankcase?
-
correct answer ✅remove the loose stud, and check the hole for
size and condition of the threads. it may be necessary to retap, and
use a oversize stud.
,Powerplant (Jeppeson) Questions And
Answers
how is a cylinder barrel checked for being out of round? -
correct answer ✅A dial indicator used to measure the top of the
cylinder and at the skirt. Two readings should be taken 90 degrees
to each other.
what type of connecting rods are commonly found in a radial
engine? -
correct answer ✅a master rod and articulated rod assembly.
what are the different types of piston rings? -
correct answer ✅compression, control and scraper rings
what is the purpose of oil control rings? -
correct answer ✅to regulate the thickness of the oil film on the
cylinder wall
what type of bearings are in general use in reciprocating engines? -
correct answer ✅plain, ball and roller bearings
where are cracks most likely to be found in a piston? -
correct answer ✅they are located in highly stressed areas
,Powerplant (Jeppeson) Questions And
Answers
what are the different types of reciprocating engine -
correct answer ✅inline, opposed, radial and V shaped engines
What is the purpose of valve overlap -
correct answer ✅promotes volumetric efficiency and better
operating temperatures
What is the purpose of crankshaft dynamic dampers -
correct answer ✅absorb the power impulses and reduced
vibration
what are the cause of engine sudden stoppage -
correct answer ✅prop strike, or internal stoppage
what inspection must be made after sudden stoppage occurs? -
correct answer ✅check prop tracking, use a dial gauge to see if
crankshaft is misaligned.
what are some of the precautions to be observed when engine
removal is being accomplished? -
, Powerplant (Jeppeson) Questions And
Answers
correct answer ✅install tail stand, chock wheels, and checks lines
and battery to insure they are no longer connected
what is the indication of a primer that is leaking during operation of
the engine? -
correct answer ✅engine will idle badly
what may be the results of incorrect installation of piston rings? -
correct answer ✅result in high oil consumption
what is an indication of an induction leaks -
correct answer ✅lower power, rough running
what are the major components of a typical gas turbine engine? -
correct answer ✅air inlet, compressor, combustion, turbine
exhaust.
what determines the amount of air passing through a turbine
engine. -
correct answer ✅speed of the aircraft and density of the air
Answers
What procedure should be followed when valve blow by is
indicated by a hissing sound on a reciprocating engine? -
correct answer ✅Perform a compression test to find the faulty
chamber
what is the running valve clearance on an engine equipped with
hydraulic valve lifters -
correct answer ✅zero
what type of check can be made to locate a cold cylinder in a twin
row radial engine? -
correct answer ✅a cold cylinder check
what factors about the condition of an engine can be learned by
studying the results of a compression check? -
correct answer ✅it determines if the valves, piston rings and
pistons are adequately sealing
what should be done to repair a loose stud in an engine crankcase?
-
correct answer ✅remove the loose stud, and check the hole for
size and condition of the threads. it may be necessary to retap, and
use a oversize stud.
,Powerplant (Jeppeson) Questions And
Answers
how is a cylinder barrel checked for being out of round? -
correct answer ✅A dial indicator used to measure the top of the
cylinder and at the skirt. Two readings should be taken 90 degrees
to each other.
what type of connecting rods are commonly found in a radial
engine? -
correct answer ✅a master rod and articulated rod assembly.
what are the different types of piston rings? -
correct answer ✅compression, control and scraper rings
what is the purpose of oil control rings? -
correct answer ✅to regulate the thickness of the oil film on the
cylinder wall
what type of bearings are in general use in reciprocating engines? -
correct answer ✅plain, ball and roller bearings
where are cracks most likely to be found in a piston? -
correct answer ✅they are located in highly stressed areas
,Powerplant (Jeppeson) Questions And
Answers
what are the different types of reciprocating engine -
correct answer ✅inline, opposed, radial and V shaped engines
What is the purpose of valve overlap -
correct answer ✅promotes volumetric efficiency and better
operating temperatures
What is the purpose of crankshaft dynamic dampers -
correct answer ✅absorb the power impulses and reduced
vibration
what are the cause of engine sudden stoppage -
correct answer ✅prop strike, or internal stoppage
what inspection must be made after sudden stoppage occurs? -
correct answer ✅check prop tracking, use a dial gauge to see if
crankshaft is misaligned.
what are some of the precautions to be observed when engine
removal is being accomplished? -
, Powerplant (Jeppeson) Questions And
Answers
correct answer ✅install tail stand, chock wheels, and checks lines
and battery to insure they are no longer connected
what is the indication of a primer that is leaking during operation of
the engine? -
correct answer ✅engine will idle badly
what may be the results of incorrect installation of piston rings? -
correct answer ✅result in high oil consumption
what is an indication of an induction leaks -
correct answer ✅lower power, rough running
what are the major components of a typical gas turbine engine? -
correct answer ✅air inlet, compressor, combustion, turbine
exhaust.
what determines the amount of air passing through a turbine
engine. -
correct answer ✅speed of the aircraft and density of the air
