ASVAB Automotive Information Practice Test 441163

Questions 5
Topics Connecting Rod, Crankshaft, Ignition Timing, Independent Suspension, Transfer Case

Study Guide

Connecting Rod

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

Crankshaft

The crankshaft converts the reciprocating motion of the piston into the rotational motion that's used to power the vehicle and its components.

Ignition Timing

Ignition timing defines the point in time at the end of the compression stroke that the spark plug fires. Measured in number of degrees before top dead center (BTDC), the exact point that the spark plugs initiate combustion varies depending on the speed of the engine. The timing is advanced (the spark plugs fire a few more degrees BTDC) when the engine is running faster and retarded when it's running slower.

Independent Suspension

Most modern cars use an independent suspension system on the front wheels. This setup allows each of the wheels on an axle to move independently in response to road level variations. Independent suspension offers much better handling and stability when compared to a rigid axle suspension at the cost of being structurally weaker and more costly to maintain.

Transfer Case

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