Dampers (damper springs) are used inside some valve springs to ________

A) Keep the valve spring attached to the valve B) Prevent valve spring surge
C) Decrease valve spring pressure D) Retain valve stem seals


B

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Evaporative cooling accounts for ___________ to __________ of the cooling effect in a tower.

a. 10% to 20% b. 40% to 70% c. 80% to 90% d. 90% to 100%

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Discuss how transhumance herders graze their livestock

What will be an ideal response?

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All parking brake mechanisms include a ratchet

Indicate whether the statement is true or false

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On a commercial refrigeration system with electric defrost, what does the evaporator fan do during the defrost cycle?

A) It runs backwards to reverse the airflow. B) It cycles like it normally would. C) It operates to circulate warm air over the evaporator coils. D) It shuts off.

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