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Grade 10 Chapter 11

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

In a typical gasoline-powered automobile engine, how many piston strokes make up a complete cycle?
a.
1
c.
3
b.
2
d.
4
 

 2. 

____ is another name used to describe the engine bottom end.
a.
Short block
c.
Crank end
b.
Cylinder block
d.
Lower deck
 

 3. 

The piston is mounted to the connecting rod by the ____.
a.
cylinder bolt
c.
wrist pin
b.
piston skirt
d.
cam lobe
 

 4. 

A timing belt, gears, or a chain drives the engine's camshaft at ____ the rotation speed of the crankshaft.
a.
one-fourth
c.
three-fourths
b.
one-half
d.
twice
 

 5. 

Pistons typically use ____ compression rings and one oil ring.
a.
2
c.
4
b.
3
d.
1 to 3
 

True/False
Indicate whether the statement is true or false.
 

 6. 

The combustion chamber is located directly above the piston.
 

 7. 

In a four-stroke cycle engine, the crankshaft must make four complete rotations to complete the cycle.
 

 8. 

The crankcase is the upper part of the engine block, where the valves are located.
 

 9. 

An intake valve is usually smaller than an exhaust valve.
 

 10. 

A crank damper helps prevent crankshaft vibration.
 

Matching
 
 
Match the following terms and identifying phrases.
a.
power stroke
d.
piston stroke
b.
BDC
e.
exhaust stroke
c.
TDC
 

 11. 

Highest point of piston travel.
 

 12. 

Caused by ignition of air-fuel mixture.
 

 13. 

Clears burned gases from cylinder.
 

 14. 

Results in 180° rotation of crankshaft.
 

 15. 

Lowest point of piston travel.
 

Completion
Complete each statement.
 

 16. 

The ______________________________ machined on the camshaft are used to open each valve as the engine operates.
 

 

 17. 

A(n) ______________________________ changes the engine cylinders’ up-and-down motion into a rotating motion.
 

 

 18. 

The engine main ______________________________ are removable inserts that fit between the crankshaft main journals and the block main bore.
 

 

 19. 

Engine operation is smoothed by the large ______________________________ mounted on the rear of the crankshaft.
 

 

 20. 

The connecting rod small end is attached to the ______________________________ by a wrist pin.
 

 

 21. 

Valves close off the intake and exhaust ______________________________ for each engine cylinder.
 

 

 22. 

A(n) ______________________________ rod transmits motion from the lifters to the valve rocker arms.
 

 

 23. 

The intake manifold on a fuel-injected engine contains passages called ______________________________ to route the fuel mixture to each cylinder.
 

 

 24. 

A machined surface, called the valve ______________________________, seals against the valve seat to close an intake or exhaust port.
 

 

 25. 

______________________________ rings prevent combustion pressure from leaking into the engine’s crankcase.
 

 



 
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