Question

question 8 of 10
joel has noticed that his engine is not compressing properly during the
compression and ignition step. what problem will this pose?

a. there will not be any exhaust.

b. there will be more exhaust.

c. the spark plug will not ignite the air/fuel mixture.

d. the engine will run inefficiently.

Explanation:

To solve this, we analyze each option:

• Option A: Exhaust is produced in the exhaust stroke, so improper compression in earlier strokes doesn't eliminate exhaust. Eliminate A.
• Option B: Improper compression in compression/ignition step doesn't directly lead to more exhaust. Exhaust amount is more related to combustion efficiency and other factors, not just compression here. Eliminate B.
• Option C: The spark plug's job is to ignite, and improper compression doesn't prevent the spark plug from sparking (igniting). The issue is with compression affecting combustion, not the spark plug's ability to ignite. Eliminate C.
• Option D: Proper compression is needed for efficient combustion (to get maximum energy from fuel). If compression is improper, combustion won't be efficient, so the engine runs inefficiently. This makes sense.

Answer:

D. The engine will run inefficiently.