2026 Tennessee Hazardous Material CDL Practice Test 2

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Your engine runs a pump when you are delivering compressed gas. After finishing the delivery, when should you turn off the engine?

Leave it on the entire time. Turn it off on arrival; use other power to run the pump. Turn it off after unhooking the hoses. Turn it off before unhooking the hoses.

Correct Answer:

Turn it off before unhooking the hoses.

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