ASVAB Automotive Information Practice Test 951998 Results

Your Results Global Average
Questions 5 5
Correct 0 3.21
Score 0% 64%

Review

1

Spark plugs receive current from the:

52% Answer Correctly

distributor

alternator

battery

ignition coil
Solution

Spark plugs receive current from the distributor and use it to spark combustion in the combustion chamber of a cylinder.

2

Which of the following is the result of the air-fuel mixture exploding instead of burning?

64% Answer Correctly

pre-ignition

post-ignition

pre-detonation

detonation
Solution

Normal combustion in an engine is initiated by a spark plug and results in the complete burning of the air-fuel mixture. If combustion is initiated by a source other than the spark plug, by a hot spot in the cylinder or combustion chamber for example, pre-ignition results. Detonation results if the air-fuel mixture explodes instead of burning. Detonation can cause extremes in pressure in the combustion chamber leading to engine damage.

3

The catalytic converter output consists primarily of:

65% Answer Correctly

water and carbon dioxide

oxygen

gasoline

carbon monoxide
Solution

The catalytic converter converts pollutants in exhaust gas into less pollutant substances like carbon dioxide and water.

4

Waste gases from combustion are removed from the combustion chamber by the:

86% Answer Correctly

piston

head gasket

camshaft

exhaust valve
Solution

The combustion chamber is located in the cylinder head and contains the combustion of the air-fuel mixture. This mixture is delivered by an intake valve and the waste gases from combustion are removed from the combustion chamber by the exhaust valve.

5

Which of the following is the result of combustion being initiated by a source other than the spark plug?

51% Answer Correctly

ignition

pre-combustion

detonation

pre-ignition
Solution

Normal combustion in an engine is initiated by a spark plug and results in the complete burning of the air-fuel mixture. If combustion is initiated by a source other than the spark plug, by a hot spot in the cylinder or combustion chamber for example, pre-ignition results. Detonation results if the air-fuel mixture explodes instead of burning. Detonation can cause extremes in pressure in the combustion chamber leading to engine damage.