Aux 1 Unit 8 Q2

Correct Answer: A) To act as a shock absorber, dampening pressure fluctuations and reducing system vibration

Explanation: Accumulators also function as shock absorbers, helping to dampen pressure fluctuations and reduce vibrations within the hydraulic system, which helps protect sensitive components and improves overall system stability.

Correct Answer: B) To prevent damage to the bladder and maintain the integrity of the accumulator

Explanation: Preventing the bladder from being extruded is essential to avoid damage to the bladder, which could lead to loss of the gas charge, leakage of hydraulic fluid, and failure of the accumulator to function properly.

Correct Answer: B) To store hydraulic energy for use during peak demand or emergency situations

Explanation: One of the main functions of an accumulator is to store hydraulic energy in the form of pressurized fluid, which can be released during peak demand or in emergency situations to ensure the system continues to operate effectively.

Correct Answer: B) Nitrogen

Explanation: Nitrogen is commonly used in gas-charged bladder accumulators because it is inert, non-reactive, and does not support combustion, making it safe for use in hydraulic systems.

Correct Answer: B) The bladder or diaphragm

Explanation: In a gas-charged bladder accumulator, the bladder or diaphragm separates the hydraulic fluid from the gas (usually nitrogen). The gas compresses as fluid enters the accumulator, storing energy.

Correct Answer: B) The gas chamber

Explanation: The gas chamber of the accumulator houses the gas charge (usually nitrogen). The gas is compressed by the hydraulic fluid entering the accumulator, storing energy that can be released when needed.

Correct Answer: B) By using a perforated plate or anti-extrusion ring at the fluid port

Explanation: A perforated plate or anti-extrusion ring is used at the fluid port to prevent the bladder from being pushed through the port when hydraulic pressure is applied. This design ensures that the bladder remains intact and functional.

Correct Answer: B) The compressed gas in the bladder expands, forcing stored hydraulic fluid back into the system

Explanation: When there is a drop in hydraulic system pressure, the compressed gas in the bladder expands, forcing the stored hydraulic fluid back into the system to maintain pressure and ensure smooth operation.