Lawn Mower Operation and Maintenance 2012-13 AREA

The component of a small engine which consists of the cylinder bore, cooling fins on air cooled engines, and valve train components.

• engine block

• cylinder block

• crankcase

• cylinder bore

The system that maintains a desired engine speed regardless of the load applied to the engine.

• ignition system

• governor system

• electrical system

• fuel system

______ is the amount of electrical pressure in a circuit.

• Wattage

• Voltage

• Amperage

• Ohms

Mowers that have blades attached to a cylinder that rotates and pushes the leaves against a sharp bed knife are known as ______ mowers.

• rotary

• flail

• reel

• hammer-knife

The volume that a piston displaces in an engine when it travels from TDC to BDC during the same piston stroke is known as _____.

• circulation

• stroke

• displacement

• compression

Which of the following is NOT a part of the crankshaft?

• crank pins

• main bearing journal

• counterweights

• cam lobes

The growth rate of turf does NOT depend on which of the following.

• environmental conditions

• degree of maintenance

• species/cultivars

• mowing frequency

The ____ ____ ____ is a system which uses force from moving air produced by rotating flywheel fins to sense engine speed.

• speed sensing device

• pneumatic governor system

• mechanical governor system

• static governor adjustment

The CPSC (Consumer Product Safety Commission) standard for blade stopping time mandates that rotary lawn equipment must stop within ____ seconds of leaving the operator presence zone.

• 3

• 5

• 6

• 10

Based on CPSC (Consumer Product Safety Commission) standards, the maximum allowable blade tip speed for rotary lawn equipment is ____ fpm (feet per minute).

• 14,000

• 19,000

• 23,500

• 25,000