ITMC Hydraulic Systems 2

Question 1

What does a hydraulic accumulator primarily store?

Accepted Answer

Hydraulic fluid under pressure

Answer

A hydraulic accumulator stores hydraulic fluid under pressure to supplement pump flow or absorb pressure shocks.

Question 2

Which type of hydraulic pump is considered a fixed-displacement pump?

Accepted Answer

Gear pump

Answer

Gear pumps deliver a fixed volume of fluid per revolution and cannot vary their displacement.

Question 3

A hydraulic system is operating at 3,000 PSI with a cylinder bore of 2 inches. What is the approximate force output?

Accepted Answer

9,425 lbf

Answer

Force = Pressure × Area; Area = π × r² = π × 1² ≈ 3.14 in²; Force = 3,000 × 3.14 ≈ 9,425 lbf.

Question 4

What is the purpose of a hydraulic flow control valve?

Accepted Answer

Regulate the speed of actuators

Answer

Flow control valves regulate the rate of fluid flow to control the speed of hydraulic actuators.

Question 5

Which hydraulic seal material is most resistant to petroleum-based hydraulic fluids?

Accepted Answer

Nitrile (Buna-N)

Answer

Nitrile rubber is the standard seal material for petroleum-based hydraulic systems due to its excellent oil resistance.

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