ASVAB Automotive Information Practice Test 639986

Questions 5
Topics Connecting Rod, Intake Stroke, Internal Combustion, Muffler, Transfer Case

Study Guide

Connecting Rod

A connecting rod employs a wrist pin to link each piston to the engine's crankshaft.

Intake Stroke

The four-stroke piston cycle of internal combustion engines starts with the piston at top of the cylinder head (top dead center or TDC) during the intake stroke. The piston moves downward in the cylinder creating a vacuum that pulls an air-fuel mix into the combustion chamber through the now open intake valve.

Internal Combustion

Combustion is the burning of an air-fuel mixture to provide energy. It requires the presence of air, fuel, and a heat source to ignite the air-fuel mixture. In the internal combustion engine that powers automobiles and trucks the combustion happens inside the engine utilzing a fuel like gasoline, diesel fuel, or natural gas.

Muffler

The muffler follows the catalytic converter and absorbs sound to help quiet load exhaust. It is followed by the exhaust pipe which is the final exit point for exhaust gas from the vehicle.

Transfer Case

The transfer case splits engine power between the front and rear axles of four-wheel drive vehicles.