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WorksheetsEngine Mechanical Assessment 1
Total questions: 20
Worksheet time: 40mins
What is the purpose of the camshaft?
Open the valves
Close the valves
Open and close the valves
Operate the pistons
Cylinder Head
Engine Block
Piston
Camshaft block
________________.
The acronym TDC means...
Telephone Direct Call
Tread Design Correction
Top Dead Center
Timing Done Correctly
The camshaft moves rods that help actuate the:
Cylinder
Intake/Exhaust Valves
Piston
Crankcase
In the intake stroke, the piston draws in_____
Air only
Air and Fuel
Oil, fuel, and air
nitro
What is valve timing?
opening the valve at the right time
closing the valve at the right time
opening and closing of the valves at the right time
not important
Camshaft turns at what speed compared to the crankshaft? Take a careful look at the gears.
Same speed
1/2 Speed
2/1 Speed
1/1 Speed
Which valvetrain configuration has the camshaft in the cylinder block.
Over Head Valve (OHV)
Over Head Cam (OHC)
Dual Over Head Cam (DOHC)
This is a trick question Mr. Linares
What transfers motion from the camshaft to the push rod in an OHV engine?
Rocker Arm
Rocker Pivot
Lifter/Tappet
Valve Spring
Cylinder volume with the piston at bottom dead center (BDC) compared to cylinder volume with the piston at top dead center (TDC)
Compression Ratio
Piston Comparison
Piston Aspect Ratio
Engine Displacement
A car engine's job is to
convert fuel into lateral force
convert chemical energy into torque
convert fuel into exhaust
convert electrical energy into torque
How many degrees of rotation equal one 4-stroke cycle?
270 degrees
360 degrees
720 degrees
180 degrees
What happens if your car leaks or burns off all of its oil?
It'll start an oil fire.
The engine will seize.
It'll cause oil poisoning.
The vehicle will explode
Technician A states engine valves are opened by the camshaft, but closed by the valve springs. Tech B states the the negative pressure of the intake stroke opens the intake valve then the spring closes it. Who is correct
Tech A
Tech B
Both Techs
Neither Tech
Technician A states the crankshaft opens and closes the valves. Technician B states the crankshaft converts reciprocating force/motion to rotational force/motion. Who is correct?
Tech A
Tech B
Both Techs
Neither Tech
Tech A states pistons convert chemical energy into torque. Tech B states pistons help stretch the air/fuel mix into a scattered mist for easy combustion. Who is correct?
Tech A
Tech B
Both Techs
Neither Tech
