Question 426 Deck General

70% to pass

If a hydraulic pump on a winch accidentally stops while hoisting, the load will stay suspended because _______________.

A the control lever will move to the stop position
B a centrifugal counterweight counteracts the force of gravity.
C a check valve will close and prevent reverse circulation
D the electric pump motor will cut out
AI Explanation

The correct answer is C) a check valve will close and prevent reverse circulation. In a hydraulic winch system, a check valve is installed to prevent the load from lowering uncontrollably if the hydraulic pump fails. When the pump stops, the check valve closes to block the reverse flow of hydraulic fluid, keeping the load suspended in place. This is a critical safety feature to prevent the load from suddenly dropping. The other answer choices are incorrect because: A) the control lever does not directly stop the load from lowering, B) there is no centrifugal counterweight involved, and D) the electric motor cutting out does not in itself prevent the load from lowering.

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