Question 171General Subjects - Assistant Engineer
70% to passWhich of the following statements concerning the operation of a single-acting hydraulic ram is correct?
AHydraulic force is applied simultaneously in two directions against the ram by directional ports.
BThe single-acting ram is not retracted by means of hydraulic force.
CThe single-acting ram is both extended and retracted by means of hydraulic force.
DHydraulic force applied to a single-acting ram results in a pulling motion.
AI Explanation
The correct answer is B) The single-acting ram is not retracted by means of hydraulic force. In a single-acting hydraulic ram, hydraulic force is only used to extend the ram. The retraction of the ram is typically accomplished by means of a spring or gravity, not through the application of hydraulic force. This is the key distinguishing feature of a single-acting ram compared to a double-acting ram, where hydraulic force is used to both extend and retract the ram. The other answer choices are incorrect because A) and C) describe the operation of a double-acting ram, while D) describes the operation of a pulling cylinder, not a single-acting ram.
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