Q
168. What are two ways to know when to shift?
General Knowledgemedium
AUse engine speed (rpm) and road signs.
BUse your watch and engine sounds.
CUse engine speed (rpm) and use road speed (mph).
Detailed Explanation
The correct answer is "Use engine speed (rpm) and use road speed (mph).". This is based on federal CDL regulations and safety standards.
Correct Answer: Use engine speed (rpm) and use road speed (mph).
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