The average operating temperature of the intake valve is approximately __________ degrees Fahrenheit.

• 12,000

• 1,200

• 120

• 12

The purpose of the cylinder wall crosshatch pattern is to:

• Control lubrication of the cylinder and aid in seating new rings

• Reduce combustion temperature

• Make the piston and rings slide easier

• Cool crankcase lubricant

The terms flo jet, pulsa jet, and vacu jet are used to describe the three types of:

• Injectors

• Venturi tubes

• Carburetors

• Needle valves

The top ring on a piston in a small gas engine is called a/an:

• Exhaust ring

• Oil ring

• Compression ring

• Scrapper ring

A clogged crankcase breather will cause:

• The engine to overheat

• The governor to malfunction

• Leaking oil seals and ruptured gaskets

• Negative crankcase pressure

Valve tappet clearance is needed to:

• Allow valves to expand

• Allow valves to stay open longer

• Reduce wear on the stem

• Reduce wear on the valve face

The angle the valve face and seat on a Briggs & Stratton engine are ground is generally:

• 45 and 30 degrees

• 45 and 50 degrees

• 15 and 30 degrees

• 60 and 45 degrees

The 4 cycle gas engine intake valve is cooled by:

• Air from the flywheel fins

• Oil from the crankcase

• Air circulating around the outside of the case of the engine

• Incoming air fuel mixture

The perforated ring on a small gas engine piston is the:

• Compression ring

• Oil ring

• Scrapper ring

• Second compression ring

After cylinders are bored or honed they should be cleaned with

• Gasoline

• Kerosene

• Soapy water

• Either B or C