Accumulator - Types

What is the function of unloading relief valve and can it be used as an accessory for accumulators?

• unloading relief valve is used to charge the accumulator by a pump when accumulator pressure falls below the set value but is not used as an accessory

• unloading relief valve is used to charge the accumulator by a pump when accumulator pressure falls below the set value and it can be used as an accessory.

• unloading relief valve is used to charge the accumulator by a pump when accumulator pressure rises above the set value and is used as an accessory

• unloading relief valve is used to charge the accumulator by a pump when accumulator pressure rises above the set value but is not used as an accessory

Accumulator used in gas charged accumulator is

• Hydraulic

• Pneumatic

• Hydropneumatic

• None of the above

A ________ is a storage reservoir under pressure where a liquid is held under pressure.

• Hydraulic accumulator

• Hydraulic crane

• Hydraulic gear

• Hydraulic pump

The inert gas used in gas compressed accumulator is usually _______

• Carbon dioxide

• Nitrogen

• Oxygen

• Sulphur

The relation for rapid change in pressure and volume adiabatically is given as

• p₀ v₀ = p₁ v₁ = p₂ v₂

• p₀ v₀ = p₁ v₁ⁿ = p₂ v₂ⁿ

• p₀ v₀ⁿ = p₁ v₁ⁿ = p₂ v₂ⁿ

• None of the above

Which of the following is a gas charged accumulator?

• Bladder type accumulator

• Spring loaded accumulator

• Weight loaded accumulator

• All the above

Which of the following statements are true for accumulator used in hydraulic systems?

1. accumulator stores fluid with pressure

2. accumulator stores fluid without any pressure

3. accumulator stores compressible liquid

4. spring is used as an external source to keep the fluid under hydraulic pressure

• 1, 3 and 4

• 1 and 4

• 2 and 3

• 2, 3 and 4

A hydraulic accumulator normally consists of________________?

• two cylinders, two rams and a storage device

• a cylinder and a ram

• two co-axial rams and two cylinders

• a cylinder, a piston, storage tank and control valve

• special type of pump with storage device and a pressure regulator

A hydraulic accumulator is a device that stores the potential energy of an ______ held under pressure

by an external source against some dynamic force.

An accumulator permits _____ to be absorbed and stored in a hydraulic system.