Question

what should be used to recharge the accumulator of your machines hydraulic system?
dry nitrogen
compressed air
oxygen
argon gas

Explanation:

In a machine's hydraulic - system accumulator, compressed air is commonly used for recharging. Dry nitrogen is also sometimes used but compressed air is a more well - known and common option among the given choices. Oxygen is too reactive and argon gas is not typically used for this purpose.

Answer:

B. Compressed air