Engine Performance Test Questions and Answers Graded A+
As pressure rises in the cylinder, also rises
A. space
B. Vacuum D
C. Volume
D. Temperature
Tech A says that turbocharging increase an engine's volu-
metric eflciency. Tech B says that supercharging decreas- B
es volumetric eflciency. Who is correct?
The gasoline spark ignition engine and the diesel com-
pression ignition engine are both examples of
engines.
A. External combustion B
B. Internal combustion
C. Two-stroke
D. Rotary
Both steam engines and Stirling engines are known as
combustion engines.
External
A. A
B. Mixed
C. Internal
D. Partial
When force causes movement, is done.
A. Work
B. Force A
C. Displacement
D. Power
The percentage at which a cylinder is filled with air when
it is running is known as:
B
A. Horsepower
B. Volumetric eflciency.
, Engine Performance Test Questions and Answers Graded A+
C. Compression
D. Vacuum
Tech A says that the valves seal the combustion chamber
so that the pressure created cannot escape. Tech B says
Both
that if not enough pressure is created in a cylinder, less
power will be created. Who is correct?
The piston engine uses the to convert the rec-
iprocating motion of the piston into rotary motion.
A. Wrist pin
D
B. Torque converter
C. Camshaft
D. Crankshaft
The internal combustion engine has been in use in auto-
mobiles for about:
A. 25 years
D
B. 50 years
C. 200 years
D. 100 years
Tech A says that spark ignition engines use glow plugs.
Tech B says that compression ignition engines don't need B
spark plugs. who is correct?
Tech A says that parasitic loss in an engine is caused by
low fuel volatility. Tech B says that parasitic loss is caused B
by internal component friction. Who is correct?
Tech A says that if valve clearance is too small, the valve will
make a ticking noise. Tech B says that if valve clearance is
Neither
too large, the valves will be held open for too long. Who
is correct?
, Engine Performance Test Questions and Answers Graded A+
The engine's oil pan does all of the following EXCEPT:
A. Catch any oil leaking out of the engine
B. Hold oil for the lubrication system. A
C. Seal ott the bottom of the crankcase.
D. Radiate oil heat to the outside ambient air.
The component that stores kinetic energy from each pow-
er stroke and helps keep the crankshaft turning through
nonpower strokes is the:
A. Flywheel A
B. Harmonic balancer
C. Connecting rod
D. Distributer
The amount of slack between the rocker arm or cam fol-
lower and the valve stem is known as valve:
A. Clearance
A
B. Duration
C. Timing
D. Lift
In variable valve timing engines, the cam phaser is con-
trolled by:
A. The power train control module
A
B. Centrifugal force
C. A vacuum modulator
D. The heat of compression
Tech A says that the internal combustion engine uses
poppet type valves. Tech B says that the lobe of the cam is
Both
the egg-shaped part that pushes on the valve to open it.
Who is correct?
Tech A says that piston clearance is necessary for lubrica-
tion between the piston and the cylinder wall. Tech B says
, Engine Performance Test Questions and Answers Graded A+
that piston clearance is necessary for piston expansion
Both
due to heat. Who is correct?
Tech A says that most pistons are made of soft iron. Tech B
says that pistons are usually made of an aluminum alloy. B
Who is correct?
The amount of time a valve stays open, measured in de-
grees of crankshaft rotation, is known as :
A. Duration
A
B. Dwell
C. Overlap
D. Burn time
Tech A says that the rotary engine is not an internal com-
bustion engine, because it does not use pistons. Tech B
B
says that a rotary engine gets three power pulses for each
rotation of the engine. Who is correct?
Tech A says that the rotary engine does not need to convert
reciprocal motion into rotary motion. Tech B says that the
Both
rotor is roughly triangular in shape and turns inside a
housing. Who is correct?
Tech A says that movement does not have to occur to have
torque. Tech B says that torque is a twisting force. Who is Both
correct?
According to law, in a sealed chamber, the pres-
sure and temperature of a gas are directly related to each
other.
A. Kirchott's D
B. Pascal's
C. Newton's
D. Charles'
As pressure rises in the cylinder, also rises
A. space
B. Vacuum D
C. Volume
D. Temperature
Tech A says that turbocharging increase an engine's volu-
metric eflciency. Tech B says that supercharging decreas- B
es volumetric eflciency. Who is correct?
The gasoline spark ignition engine and the diesel com-
pression ignition engine are both examples of
engines.
A. External combustion B
B. Internal combustion
C. Two-stroke
D. Rotary
Both steam engines and Stirling engines are known as
combustion engines.
External
A. A
B. Mixed
C. Internal
D. Partial
When force causes movement, is done.
A. Work
B. Force A
C. Displacement
D. Power
The percentage at which a cylinder is filled with air when
it is running is known as:
B
A. Horsepower
B. Volumetric eflciency.
, Engine Performance Test Questions and Answers Graded A+
C. Compression
D. Vacuum
Tech A says that the valves seal the combustion chamber
so that the pressure created cannot escape. Tech B says
Both
that if not enough pressure is created in a cylinder, less
power will be created. Who is correct?
The piston engine uses the to convert the rec-
iprocating motion of the piston into rotary motion.
A. Wrist pin
D
B. Torque converter
C. Camshaft
D. Crankshaft
The internal combustion engine has been in use in auto-
mobiles for about:
A. 25 years
D
B. 50 years
C. 200 years
D. 100 years
Tech A says that spark ignition engines use glow plugs.
Tech B says that compression ignition engines don't need B
spark plugs. who is correct?
Tech A says that parasitic loss in an engine is caused by
low fuel volatility. Tech B says that parasitic loss is caused B
by internal component friction. Who is correct?
Tech A says that if valve clearance is too small, the valve will
make a ticking noise. Tech B says that if valve clearance is
Neither
too large, the valves will be held open for too long. Who
is correct?
, Engine Performance Test Questions and Answers Graded A+
The engine's oil pan does all of the following EXCEPT:
A. Catch any oil leaking out of the engine
B. Hold oil for the lubrication system. A
C. Seal ott the bottom of the crankcase.
D. Radiate oil heat to the outside ambient air.
The component that stores kinetic energy from each pow-
er stroke and helps keep the crankshaft turning through
nonpower strokes is the:
A. Flywheel A
B. Harmonic balancer
C. Connecting rod
D. Distributer
The amount of slack between the rocker arm or cam fol-
lower and the valve stem is known as valve:
A. Clearance
A
B. Duration
C. Timing
D. Lift
In variable valve timing engines, the cam phaser is con-
trolled by:
A. The power train control module
A
B. Centrifugal force
C. A vacuum modulator
D. The heat of compression
Tech A says that the internal combustion engine uses
poppet type valves. Tech B says that the lobe of the cam is
Both
the egg-shaped part that pushes on the valve to open it.
Who is correct?
Tech A says that piston clearance is necessary for lubrica-
tion between the piston and the cylinder wall. Tech B says
, Engine Performance Test Questions and Answers Graded A+
that piston clearance is necessary for piston expansion
Both
due to heat. Who is correct?
Tech A says that most pistons are made of soft iron. Tech B
says that pistons are usually made of an aluminum alloy. B
Who is correct?
The amount of time a valve stays open, measured in de-
grees of crankshaft rotation, is known as :
A. Duration
A
B. Dwell
C. Overlap
D. Burn time
Tech A says that the rotary engine is not an internal com-
bustion engine, because it does not use pistons. Tech B
B
says that a rotary engine gets three power pulses for each
rotation of the engine. Who is correct?
Tech A says that the rotary engine does not need to convert
reciprocal motion into rotary motion. Tech B says that the
Both
rotor is roughly triangular in shape and turns inside a
housing. Who is correct?
Tech A says that movement does not have to occur to have
torque. Tech B says that torque is a twisting force. Who is Both
correct?
According to law, in a sealed chamber, the pres-
sure and temperature of a gas are directly related to each
other.
A. Kirchott's D
B. Pascal's
C. Newton's
D. Charles'
