A &P PREPWARE POWERPLANT NEWEST
EXAM 2025 WITH MULTIPLE CHOICE OF
QUESTIONS AND CORRECT DETAILED
SOLVED SOLUTIONS ALREADY GRADED A+
AND 100% GUARANTEE PASS (JUST
RELEASED!!!!!)
Valve clearance changes on opposed-type engines using
hydraulic lifters are accomplished by - CORRECT ANSWER-push rod
replacement.
If metallic particles are found in the oil filter during an
inspection, - CORRECT ANSWER-the cause should be identified and
corrected before the aircraft is released for flight.
What is the principal advantage of using propeller reduction
gears? - CORRECT ANSWER-To enable the engine RPM to be
increased with an accompanying increase in power and allow
the prop to remain at a lower, more efficient RPM.
Full-floating piston pins are those which allow motion between
the pin and - CORRECT ANSWER-both the piston and the small end of
the connecting rod.
,What conditions will cause an engine to have an increased
tendency to detonate? - CORRECT ANSWER-High manifold pressure,
high intake air temperature, and engine overheated.
Which of the following is a characteristic of a thrust bearing
used in most radial engines? - CORRECT ANSWER-Deep-groove ball.
Some cylinder barrels are hardened by - CORRECT ANSWER-
nitriding.
Master rod bearings are generally what type? - CORRECT ANSWER-
Plain.
Direct mechanical push-pull carburetor heat control linkages
should normally be adjusted so that that the stop located on the
diverter valve will be contacted - CORRECT ANSWER-before the stop
at the control lever is reached in both HOT and COLD
positions.
The purpose of two or more valve springs in aircraft engines is
to - CORRECT ANSWER-eliminate valve spring surge.
Cam-ground pistons are installed in some aircraft engines to -
CORRECT ANSWER-provide a better fit at operating temperatures.
The volume of a cylinder equals 70 cubic inches when the
piston is at bottom center. When the piston is at the top of the
cylinder, the volume equals 10 cubic inches. What is the
compression ratio? - CORRECT ANSWER-7:1
,If the ignition switch is moved from BOTH to either LEFT or
RIGHT during an engine ground check, a normal operation is
usually indicated by a - CORRECT ANSWER-slight drop in RPM.
The five events of a four-stroke cycle engine in the order of their
occurrence are - CORRECT ANSWER-intake, compression, power,
exhaust.
Which of the following would most likely cause a reciprocating
engine to backfire through the induction system at low RPM
operation? - CORRECT ANSWER-Lean mixture.
How is proper end-gap clearance on new piston rings assured
during the overhaul of an engine? - CORRECT ANSWER-By placing
the rings in the cylinder and measuring the end-gap with a
feeler gauge.
What will be the likely result if the piston ring gaps happen to
be aligned when performing a differential-pressure
compression check on a cylinder? - CORRECT ANSWER-A worn or
defective ring(s) indication.
Increased water vapor (higher relative humidity) in the
incoming air to a recip engine will normally result in which of
the following? - CORRECT ANSWER-Decreased engine power at
constant RPM and manifold pressure.
During the inspection of an engine control system in which
push-pull control rods are used, the threaded rod ends should -
, CORRECT ANSWER-be checked for the amount of thread engagement
by means of the inspection holes.
During routine inspections of a recipe 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 - CORRECT ANSWER-may be a
result of abnormal plain type bearing wear and is cause for
further investigation.
Which of the following will be caused by excessive valve
clearance of a cylinder on a recip aircraft engine? - CORRECT
ANSWER-Reduced valve overlap.
Standard aircraft cylinder oversizes usually range from 0.010
inch to 0.030 inch. Oversize on automobile engine cylinders
may range put to 0.100 inch. This is because aircraft engine
cylinders - CORRECT ANSWER-have relatively thin walls and may be
nitrided.
To what altitude will a turbo charged engine maintain sea level
pressure? - CORRECT ANSWER-Critical altitude.
Valve overlap is defined as the number of degrees of crankshaft
travel - CORRECT ANSWER-during which both valves are off their
seats.
The floating control thermostat, used on some reciprocating
engine installations, helps regulate oil temp by - CORRECT ANSWER-
controlling air flow through the oil cooler.
EXAM 2025 WITH MULTIPLE CHOICE OF
QUESTIONS AND CORRECT DETAILED
SOLVED SOLUTIONS ALREADY GRADED A+
AND 100% GUARANTEE PASS (JUST
RELEASED!!!!!)
Valve clearance changes on opposed-type engines using
hydraulic lifters are accomplished by - CORRECT ANSWER-push rod
replacement.
If metallic particles are found in the oil filter during an
inspection, - CORRECT ANSWER-the cause should be identified and
corrected before the aircraft is released for flight.
What is the principal advantage of using propeller reduction
gears? - CORRECT ANSWER-To enable the engine RPM to be
increased with an accompanying increase in power and allow
the prop to remain at a lower, more efficient RPM.
Full-floating piston pins are those which allow motion between
the pin and - CORRECT ANSWER-both the piston and the small end of
the connecting rod.
,What conditions will cause an engine to have an increased
tendency to detonate? - CORRECT ANSWER-High manifold pressure,
high intake air temperature, and engine overheated.
Which of the following is a characteristic of a thrust bearing
used in most radial engines? - CORRECT ANSWER-Deep-groove ball.
Some cylinder barrels are hardened by - CORRECT ANSWER-
nitriding.
Master rod bearings are generally what type? - CORRECT ANSWER-
Plain.
Direct mechanical push-pull carburetor heat control linkages
should normally be adjusted so that that the stop located on the
diverter valve will be contacted - CORRECT ANSWER-before the stop
at the control lever is reached in both HOT and COLD
positions.
The purpose of two or more valve springs in aircraft engines is
to - CORRECT ANSWER-eliminate valve spring surge.
Cam-ground pistons are installed in some aircraft engines to -
CORRECT ANSWER-provide a better fit at operating temperatures.
The volume of a cylinder equals 70 cubic inches when the
piston is at bottom center. When the piston is at the top of the
cylinder, the volume equals 10 cubic inches. What is the
compression ratio? - CORRECT ANSWER-7:1
,If the ignition switch is moved from BOTH to either LEFT or
RIGHT during an engine ground check, a normal operation is
usually indicated by a - CORRECT ANSWER-slight drop in RPM.
The five events of a four-stroke cycle engine in the order of their
occurrence are - CORRECT ANSWER-intake, compression, power,
exhaust.
Which of the following would most likely cause a reciprocating
engine to backfire through the induction system at low RPM
operation? - CORRECT ANSWER-Lean mixture.
How is proper end-gap clearance on new piston rings assured
during the overhaul of an engine? - CORRECT ANSWER-By placing
the rings in the cylinder and measuring the end-gap with a
feeler gauge.
What will be the likely result if the piston ring gaps happen to
be aligned when performing a differential-pressure
compression check on a cylinder? - CORRECT ANSWER-A worn or
defective ring(s) indication.
Increased water vapor (higher relative humidity) in the
incoming air to a recip engine will normally result in which of
the following? - CORRECT ANSWER-Decreased engine power at
constant RPM and manifold pressure.
During the inspection of an engine control system in which
push-pull control rods are used, the threaded rod ends should -
, CORRECT ANSWER-be checked for the amount of thread engagement
by means of the inspection holes.
During routine inspections of a recipe 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 - CORRECT ANSWER-may be a
result of abnormal plain type bearing wear and is cause for
further investigation.
Which of the following will be caused by excessive valve
clearance of a cylinder on a recip aircraft engine? - CORRECT
ANSWER-Reduced valve overlap.
Standard aircraft cylinder oversizes usually range from 0.010
inch to 0.030 inch. Oversize on automobile engine cylinders
may range put to 0.100 inch. This is because aircraft engine
cylinders - CORRECT ANSWER-have relatively thin walls and may be
nitrided.
To what altitude will a turbo charged engine maintain sea level
pressure? - CORRECT ANSWER-Critical altitude.
Valve overlap is defined as the number of degrees of crankshaft
travel - CORRECT ANSWER-during which both valves are off their
seats.
The floating control thermostat, used on some reciprocating
engine installations, helps regulate oil temp by - CORRECT ANSWER-
controlling air flow through the oil cooler.
