Small engine CDE-3

In an overhead valve configuration, where are the rocker arms installed?

• a. in the block

• b. to the crankshaft

• c. in the cylinder head

• d. in the crankcase

The rocker arms operate like:

• a. gears

• b. springs

• c. lifters

• d. levers

When one end of the rocker arm is pushed up, the other end pushes down on the ________.

• camshaft

• crankshaft

• valve stem

• valve head

In an overhead cam design, the camshaft may be positioned directly over the valves or they may be offset. If the camshaft is offset, ______ are added to the design to transfer motion from the camshaft to the valves.

• a. pushrods

• b. lifters

• c. rocker arms

• d. springs

The camshaft in an overhead cam design is usually driven by either a ______ or ______.

• a. chain or belt

• b. chain or gear

• c. belt or gear

• d. gear or shaft

The overhead valve design as compared to the L-head design can increase fuel efficiency by as much as ______.

• a. 5%

• b. 10%

• c. 25%

• d. 50%

Which part of the engine must be removed before the push rods can be removed?

• a. rocker arms

• b. valves

• c. valve springs

• d. piston

If the push rods are bent they must be:

• a. sanded

• b. measured with a micrometer

• c. straightened

• d. replaced

Which of the following types of engines have valves and springs that are capable of being removed with your hands without the use of tools?

• a. straight valve engines

• b. 2-cycle engines

• c. L-head engines

• d. OHV engines

Which of the following statements is true?

• a. Most valve face angles are 60 degrees

• b. To adjust the tappet clearance on OHV engines, the valve stem must be ground.

• c. Valve guides can be replaced.

• d. If valves are warped they can still be used.