Just before the piston reaches the top-dead center (TDC), a(n) ____ fires in the cylinder and ignites the compressed air–fuel mixture.

a. coil
b. distributer
c. spark plug
d. injector


c. spark plug

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Technician A says that some multivalve heads use control valves that cause only one intake valve to open at low rpm and another to open at higher rpm. Technician B says that other multivalve heads use two intake manifold runners per cylinder. Who is correct?

A. A only B. B only C. Both A and B D. Neither A nor B

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When applying the principles of work and force:

A. No work is accomplished when an object is stopped by mechanical force B. If a 50-pound object is moved 5 feet, 250 ft-lb of work is produced C. Work is produced when a force moves a certain mass a specific distance D. All of the above

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Most pickup trucks use which type of frame?

A) Unit body B) Stub frame C) Full frame D) None of these is correct.

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There are 8/8 in an inch. How many 1/8 inches are there in the diameter of a 3-inch piston?

A. 24 B. 26 C. 28 D. 32

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