Aux 1 Unit 5 Q3

Correct Answer: B) To protect the pump and system from excessive pressure buildup

Explanation: A relief valve is installed to protect the pump and system from excessive pressure buildup. In the event of a blockage or other issue, the relief valve opens to release excess pressure, preventing damage to the pump and system.

Correct Answer: B) The pump could over-pressurize, leading to potential damage or failure

Explanation: If the discharge line is blocked, the pump could over-pressurize because positive displacement pumps continue to move fluid regardless of pressure conditions. This could lead to damage or failure of the pump or system components.

Correct Answer: B) It provides a more continuous and higher flow rate with fewer pulsations

Explanation: The primary advantage of a double-acting piston pump is that it provides a more continuous flow with fewer pulsations, as it pumps fluid during both the forward and return strokes, resulting in a more efficient and consistent fluid delivery.

Correct Answer: B) It pumps fluid during both the forward and return strokes of the piston

Explanation: A double-acting piston pump is designed to move fluid during both the forward and return strokes of the piston, which allows for continuous fluid delivery and improved efficiency compared to single-acting pumps.

Correct Answer: C) The cylinder design ensures that fluid is pumped on both strokes of the piston

Explanation: The cylinder in a double-acting piston pump is designed so that fluid is pumped on both the forward and return strokes of the piston, which contributes to continuous fluid flow and enhances the pump's overall performance.

Correct Answer: B) They prevent the backflow of fluid, ensuring that fluid flows only in the desired direction

Explanation: The check valves in a double-acting piston pump prevent backflow and ensure that the fluid flows in the desired direction during both the suction and discharge phases of the piston's movement.

Correct Answer: A) Fluid is expelled through the discharge valve from the opposite side of the piston

Explanation: During the return stroke, the fluid on the opposite side of the piston is expelled through the discharge valve, while new fluid is drawn into the other side of the cylinder, maintaining continuous pumping action.

Correct Answer: B) Fluid is expelled from the cylinder through the discharge valve

Explanation: During the forward stroke of the piston in a double-acting pump, fluid is expelled from one side of the cylinder through the discharge valve, while the other side of the piston simultaneously draws in fluid through the suction valve.

Correct Answer: C) By having the piston pump fluid on both strokes, eliminating idle periods

Explanation: A double-acting piston pump ensures continuous fluid flow by pumping fluid during both the forward and return strokes of the piston. This design eliminates the idle period found in single-acting pumps, resulting in a more consistent flow.

Correct Answer: B) To prevent fluid leakage between the high-pressure and low-pressure sides of the piston

Explanation: Proper maintenance of the piston seals is crucial to prevent fluid leakage between the high-pressure and low-pressure sides of the piston, which ensures that the pump operates efficiently and maintains the desired pressure.