A gradual decrease in the discharge pressure...

Question 1 / 270705eccef9cbacbc34ba4d459ea

Question 1 of 270705eccef9cbacbc34ba4d459ea

A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by __________.

Question 1 of 27070

A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by __________.

🔍 Key Concepts

• Hydraulic system pressure vs. flow – what actually causes pressure to drop slowly over time in a running system • Behavior of a bleeder (relief/drain) valve if it is stuck open vs. closed • Effect of fluid temperature and viscosity (cold vs. warm oil) on pump pressure and flow

💭 Think About

• Ask yourself which option would let oil continuously leak or bypass back to the reservoir, slowly reducing system pressure while the pump keeps running • Decide which options would more likely cause an immediate, obvious failure (no movement / no pressure) rather than a gradual decrease in pressure • Think about whether cold hydraulic fluid would more likely cause high pressure or low pressure at start‑up, and how that changes as it warms up

✅ Before You Answer

• Identify the choice that creates a continuous loss path for hydraulic fluid from the pressure side back to the tank • Eliminate any choices that would cause sudden loss of motion/pressure instead of a gradual drop • Consider how temperature affects viscosity: thicker (cold) oil vs. thinner (hot) oil and which condition matches a gradual pressure decrease

Question 1 of 27070

A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by __________.

the four-way control valve failing to shift

the bleeder valve sticking in the open position

a clogged air vent filter on the oil reservoir

cold hydraulic fluid

Question 1 / 270705eccef9cbacbc34ba4d459ea

Question 1 of 270705eccef9cbacbc34ba4d459ea

A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by __________.

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Question 1 of 27070

A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by __________.