chapter 05

Oil that is fed to the main bearings passes through the crankshaft to the connecting rod throws via what method?

A. Drilled oil passageways in the crankshaft.

Which of the following may be made of hard metal and pressed into the body of the cylinder head?

A. Valve guides and valve seats.

The main advantage of using aluminum instead of cast iron in piston construction is that the aluminum piston will be _____.

A. lighter

Which engine part has its upper end moving up and down in a cylinder as its bottom end revolves around the crankshaft's centerline?

B. Connecting rod.

Proper _____ allows the piston ring to lengthen when it heats up, preventing breakage.

B. ring gap

All of the following statements about engine blocks are true, except:

B. the heavier the block, the better it can control heat expansion.

A period in degrees of camshaft rotation in which both the intake and exhaust valves are partially open is referred to as _____.

B. valve overlap

A piston pin attaches a piston to which engine part?

C. Connecting rod.

Which of the following parts is not used in an overhead camshaft cylinder head?

C. Pushrods

On the lower end of connecting rods, a _____ is placed between the rod and the crankshaft rod journal.

C. bearing insert

2. After a cylinder is cast into a block, what two processes are used to give it a smooth, accurate finish?

D. Boring and honing.

Crankshafts are usually made of _____.

D. alloy steel or cast iron

Cam ground pistons and steel struts or rings cast into an aluminum piston are two common ways to address piston _____.

D. expansion

An oil control piston ring does all of the following, except:

D. keeps compression from leaking out of the combustion chamber

When an engine valve _____, a wiping action occurs between the face and seat that prevents carbon buildup and hot spots.

D. rotates

Timing controls installed on the end of a camshaft at the timing gear that adjust the relationship between the camshaft and timing gear are part of a(n) _____ system.

D. variable valve timing

Piston pins are hollow to reduce _____.

D. weight

True or False? A free-floating pin is pressed into the connecting rod.

false

True or False? In order to prevent burning, an exhaust valve must have maximum clearance in the valve guide.

false

True or False? The connecting rod cap can be installed properly in any direction on the connecting rod.

false

True or False? The piston rings installed at the bottom of a piston are always compression rings.

false

True or False? A cam ground piston becomes round when it is fully heated.

true