ASVAB Automotive Information Practice Test 778984 Results

Your Results Global Average
Questions 5 5
Correct 0 3.05
Score 0% 61%

Review

1

For inline cylinder arrangements in an engine, how are the cylinders numbered?

50% Answer Correctly

sequentially from the front of the engine to the back

alternating from the back of the engine to the front

sequentially from the back of the engine to the front

alternating from the front of the engine to the back
Solution

Inline cylinder arrangements number cylinders sequentially (1, 2, 3, ...) front to rear.

2

Which of the following statements about an inline cylinder configuration is false?

54% Answer Correctly

cylinders can be completely vertical or slanted

cylinders are configured in a single row

increases the length of the engine

works well in eight cylinder engines
Solution

An inline cylinder configuration places the cylinders in a single row either completely vertical or slanted. Due to this arrangement, an inline cylinder configuration makes the engine longer and, although it works well in four cylinder engines, performace suffers in larger engines due to the difficulty in evenly distributing the air-fuel mixture over the length of the engine.

3

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

51% Answer Correctly

ignition

detonation

pre-combustion

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.

4

The primary purpose of the muffler is to:

75% Answer Correctly

quiet exhaust

reclaim unburned fuel

remove harmful gases from the exhaust

cool the exhaust
Solution

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.

5

What links each piston to the engine's crankshaft?

72% Answer Correctly

cylinder arm

piston ring

connecting rod

halfshaft
Solution

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