Which of the following is listed as a type of accumulator that has no barrier separating gas from oil?

Which of the following is listed as a type of accumulator that has no barrier separating gas from oil?

• A. No barrier accumulator
• B. Gas over bladder
• C. Piston-type
• D. Diaphragm type

Answer: (A)

When thinking about accumulators, you’re focusing on how the gas and oil are separated. Some designs keep them apart with a barrier—such as a piston, a diaphragm, or a bladder—so the gas never contacts the oil. A no-barrier accumulator has no such separation; the gas and oil are in direct contact, and the energy storage comes from the gas being compressed against the oil without a membrane or piston in between. This is why the no-barrier type is the correct choice for a design with no barrier separating gas from oil. The other options all use some barrier to keep the gas and oil separate, so they don’t fit the description.

When thinking about accumulators, you’re focusing on how the gas and oil are separated. Some designs keep them apart with a barrier—such as a piston, a diaphragm, or a bladder—so the gas never contacts the oil. A no-barrier accumulator has no such separation; the gas and oil are in direct contact, and the energy storage comes from the gas being compressed against the oil without a membrane or piston in between. This is why the no-barrier type is the correct choice for a design with no barrier separating gas from oil. The other options all use some barrier to keep the gas and oil separate, so they don’t fit the description.