Ch. 11

____ is another name used to describe the engine bottom end.

Short Block

Match each of the letters in the drawing to the corresponding part of the connecting rod assembly

. A. Rod nut B. Rod cap C. Rod bolt D. Connecting Rod E. Rod small end F. Rod bushing G. I-Beam H. Rod bearing inserts

Pistons typically use ____ compression rings and one oil ring.

2

A. Caused by ignition of air-fuel mixture. B. Lowest point of piston travel. C. Highest point of piston travel. D. Results in 180° rotation of crankshaft. E. Clears burned gases from cylinder.

A. Power Stoke B. BDC C. TDC D. Piston Stroke E. Exhaust Stoke

Match each of the letters in the drawing to the corresponding part of the intake and exhaust valves.

A. Valve stem tip B. Stem C. Stem D. Face E. Margin F. Head

____ rings prevent combustion pressure from leaking into the engine's crankcase.

Compression

A ____ changes the engine cylinders' up-and-down motion into a rotating motion.

Crankshaft

An intake valve is usually smaller than an exhaust valve.

False

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

False

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

False

The flywheel contains a small ring gear, which is used to start the engine.

False

In a typical gasoline-powered automobile engine, how many piston strokes make up a complete cycle?

Four

A timing belt, gears, or a chain drives the engine's camshaft at ____ the rotation speed of the crankshaft.

One-half

A crank damper helps prevent crankshaft vibration.

True

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

True

The combustion chamber is located directly above the piston.

True

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

True

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

True

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

True

To prevent oil from entering the combustion chambers through the valve guides, valve seals fit over the valve stems.

True

The piston is mounted to the connecting rod by the ____.

Wrist Pin