Internal Combustion Engines Pretest

An engine is a device that changes

• mechanical energy into potential energy

• electrical energy into mechanical energy

• heat energy into potential energy

• chemical energy into mechanical energy

The credit for the first gasoline-powered internal combustion engine goes to

• Henry Ford

• Christen Huygen

• Nikolaus Otto

• Gottlieb Daimler

The four events that must occur to have an internal combustion engine are

• intake, compression, combustion, and exhaust

• compression, cranking, condensation, and exhaust

• cooling, combustion, reciprocating, and exhaust

• stroke up, reciprocating, stroke down, turning

The four main parts of every engine include all of the following, except

• cylinder

• header

• piston

• connecting rod

The power from an internal combustion engine comes from the

• rapid contraction of exhaust gases as they cool

• vacuum produced in the crankcase during the compression stroke

• spark plug igniting

• force of expanding gases after combustion

During the intake stroke of a four-stroke engine, the intake

• valve is closed, the exhaust valve is open, and the piston is moving up

• valve is open, the exhaust valve is closed, and the piston is moving down

• and exhaust valves are closed, and the piston is moving up

• and exhaust valves are closed, and the piston is down

During the power stroke of a four-stroke engine, the intake

• valve is closed, the exhaust valve is open, and the piston is moving up

• valve is open, the exhaust valve is closed, and the piston is moving down

• and exhaust valves are closed, and the piston is moving up

• and exhaust valves are closed, and the piston is moving down

The cylinder head performs all of the following function except

• houses the valves

• covers the crankshaft

• houses the spark plug(s)

• seals the combustion chamber

Engine cooling is accomplished by

• liquid or air movement

• refrigerant circulation

• the Peltier effect

• compression of the air-fuel mixture

Tags

NGSS.MS-PS3-3

Valve timing is accomplished by rotation of the

• piston

• connecting rod

• camshaft

• valves