ASVAB Automotive Information Practice Test 49413 Results

Your Results Global Average
Questions 5 5
Correct 0 3.35
Score 0% 67%

Review

1

What's the name of the low-voltage winding in the ignition coil?

58% Answer Correctly

primary coil winding

secondary coil winding

tertiary coil winding

distributor coil winding


Solution

The ignition coil is a high-voltage transformer made up of two coils of wire. The primary coil winding is the low-voltage winding and has relatively few turns of heavy wire. The secondary coil winding is the high-voltage winding that surrounds the primary and is made up of thousands of turns of fine wire. Current flows from the battery through the primary coil winding which creates a changing magnetic field inside the secondary coil. This induces a very high-voltage current in the secondary coil which it feeds to the distributor.


2

What provides the power necessary to start a car?

85% Answer Correctly

spark plugs

powertrain control module

battery

alternator


Solution

The battery supplies the power necessary to start the engine when the ignition switch is is turned on.


3

What is the large casing that contains the cylinders and many of the internal components of the engine?

82% Answer Correctly

engine block

chassis

manifold

transmission


Solution

The engine (or cylinder) block is the large casing that contains the cylinders and many of the internal components of the engine.


4

__________ results from oil buildup in the combustion chamber.

43% Answer Correctly

detonation

combustion

engine knock

preignition


Solution

Preignition results from the buildup of fuel deposits and/or oil in the combustion chamber. These deposits increase chamber pressure and reduce heat tranfer to the coolant. The trapped heat then raises the temperature of the air-fuel mix to the point that it combusts before ignition.


5

A constant velocity (CV) joint is closely related to which of the following?

63% Answer Correctly

master cylinder

sprint joint

universal joint

ball joint


Solution

Like CV joints, universal joints (U-joints) are located at each end of a drive shaft and allow the shaft to operate at a variable angle with the item it is driving. Universal joints perform the same basic function as CV joints but CV joints have a wider range of operation.