Autoshop Final Exam Version 1 Exam Questions
With Complete Solutions Graded A++
Technician A says that compression pressures have to be lower in combustion
ignition engines. Technician B says that the heat of compression ignites the fuel
in a compression ignition engine. Who is correct?
The normal mixture of the antifreeze and water that make up coolant is:
50/50.
Which of the following malfunctions is indicated by a running compression
reading that rises to 95% of cranking compression pressure when the throttle is
snapped to wide open?
Restriction in the exhaust system
The device that is attached to the radiator to help draw air through the entire
radiator is called the:
Technicians A and B are discussing cylinder leakage test results. Technician A
says that 5% leakage past the exhaust valves is acceptable. Technician B says
that all piston rings will leak at least 20%. Who is correct?
What unit of measure can be used when testing engine compression and cylinder
leakage?
The outward force that is exerted on a rotating body is known as:
centrifugal force
Technician A says that to measure freeze protection, you can use a refractometer.
Technician B says that to measure freeze protection, you can use a hydrometer.
Who is correct?
Both Technician A and Technician B
When the throttle is snapped wide open during a running compression test, what
reading should be seen for a normal cylinder?
, Technician A says that in a performance engine, large valve overlap and lift
increase high-end rpm. Technician B says that low-end power is sacrificed as a
result of large valve overlap. Who is correct?
Technician A says that on some engines, the timing belt drives the water pump.
Technician B says that some cooling fans use hydraulic fluid from the power
steering to drive the fan. Who is correct?
Technician A says that a Miller cycle engine is a variation of a two-stroke engine.
Technician B says that an Atkinson cycle engine is efficient only between 2,000
and 4,500 rpm. Who is correct?
The component that stores kinetic energy from each power stroke and helps keep
the crankshaft turning through nonpower strokes is the:
flywheel.
The engine's oil pan does all of the following, EXCEPT:
catch any oil leaking out of the engine
Technician A says that the internal combustion engine uses poppet type valves.
Technician B says that the lobe of the cam is the egg-shaped part that pushes on
the valve to open it. Who is correct?
Which of the following is NOT a function of lubricating oil?
Burn
Technician A says that green coolant that has been around since the 1930s is
categorized as a HOAT coolant. Technician B says that HOAT stands for hybrid
organic acid technology. Who is correct?
Technician B
Technician A says that a leaky radiator cap could cause and engine to overheat.
Technician B says that a thermostat stuck closed could cause the engine to
overheat. Who is correct?
Both Tech A and Tech B
Technician A says that before checking the oil level, the vehicle must be on a
level surface. Technician B says that the vehicle should be placed on jack stands.
Who is correct?
Technician A
With Complete Solutions Graded A++
Technician A says that compression pressures have to be lower in combustion
ignition engines. Technician B says that the heat of compression ignites the fuel
in a compression ignition engine. Who is correct?
The normal mixture of the antifreeze and water that make up coolant is:
50/50.
Which of the following malfunctions is indicated by a running compression
reading that rises to 95% of cranking compression pressure when the throttle is
snapped to wide open?
Restriction in the exhaust system
The device that is attached to the radiator to help draw air through the entire
radiator is called the:
Technicians A and B are discussing cylinder leakage test results. Technician A
says that 5% leakage past the exhaust valves is acceptable. Technician B says
that all piston rings will leak at least 20%. Who is correct?
What unit of measure can be used when testing engine compression and cylinder
leakage?
The outward force that is exerted on a rotating body is known as:
centrifugal force
Technician A says that to measure freeze protection, you can use a refractometer.
Technician B says that to measure freeze protection, you can use a hydrometer.
Who is correct?
Both Technician A and Technician B
When the throttle is snapped wide open during a running compression test, what
reading should be seen for a normal cylinder?
, Technician A says that in a performance engine, large valve overlap and lift
increase high-end rpm. Technician B says that low-end power is sacrificed as a
result of large valve overlap. Who is correct?
Technician A says that on some engines, the timing belt drives the water pump.
Technician B says that some cooling fans use hydraulic fluid from the power
steering to drive the fan. Who is correct?
Technician A says that a Miller cycle engine is a variation of a two-stroke engine.
Technician B says that an Atkinson cycle engine is efficient only between 2,000
and 4,500 rpm. Who is correct?
The component that stores kinetic energy from each power stroke and helps keep
the crankshaft turning through nonpower strokes is the:
flywheel.
The engine's oil pan does all of the following, EXCEPT:
catch any oil leaking out of the engine
Technician A says that the internal combustion engine uses poppet type valves.
Technician B says that the lobe of the cam is the egg-shaped part that pushes on
the valve to open it. Who is correct?
Which of the following is NOT a function of lubricating oil?
Burn
Technician A says that green coolant that has been around since the 1930s is
categorized as a HOAT coolant. Technician B says that HOAT stands for hybrid
organic acid technology. Who is correct?
Technician B
Technician A says that a leaky radiator cap could cause and engine to overheat.
Technician B says that a thermostat stuck closed could cause the engine to
overheat. Who is correct?
Both Tech A and Tech B
Technician A says that before checking the oil level, the vehicle must be on a
level surface. Technician B says that the vehicle should be placed on jack stands.
Who is correct?
Technician A
