Multiple Choice
A normal vacuum gauge reading while the engine is idling is steady and at _____. The rougher the engine runs, the more the gauge readings will fluctuate.
A) 8 in. Hg
B) 17 in. Hg
C) 22 in. Hg
D) 30 in. Hg
Correct Answer:

Verified
Correct Answer:
Verified
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