When the port power unit is started, as...

Question 1 / 205eccef9cbacbc34ba4d45a0e

Question 1 of 205eccef9cbacbc34ba4d45a0e

When the port power unit is started, as shown in the illustration, the unloading valve "C" __________. See illustration GS-0123.

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Question 1 of 20

5eccef9cbacbc34ba4d45a0e

When the port power unit is started, as shown in the illustration, the unloading valve "C" __________. See illustration GS-0123.

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🔍 Key Concepts

• Hydraulic unloading valve operation in a steering or power unit system • Relationship between replenishing pump flow, service tank, and pilot pressure to shift distributor valve "A" • Difference between centered (neutral) and shifted positions of a spool-type valve like "C"

💭 Think About

• On the diagram, when the port power unit starts, where does the initial replenishing pump flow try to go, and what would that do to system pressure if valve "C" stayed centered? • Look at the pilot lines running from the replenishing/servo pump toward distributor valve "A". How would shifting valve "C" change the pressure in those lines compared with sending flow directly back to the service tank? • Which answer choices describe building pilot pressure versus dumping flow to tank, and which side (port or starboard) of the system is each one talking about?

✅ Before You Answer

• Confirm which lines connected to valve "C" go to the service tank and which go toward the pilot passages feeding distributor valve "A". • Verify whether the diagram shows valve "C" controlling port-side or starboard-side flow when the port unit is started. • Eliminate any options that would continuously send replenishing flow to the service tank, since that would prevent building the pilot pressure needed to shift distributor valve "A".

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Question 1 of 20

When the port power unit is started, as shown in the illustration, the unloading valve "C" __________. See illustration GS-0123.

remains centered to allow the servo pump discharge to build pilot pressure to shift the port unit distributor valve

shifts to direct port replenishing flow to the service tank

shifts, blocking the replenishing pump flow to the service tank, thus building the required pilot pressure to shift the distributor valve "A"

shifts to block the servo pump discharge from the starboard unit when started, thus building pilot pressure to shift the starboard unit distributor valve

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Question 1 / 205eccef9cbacbc34ba4d45a0e

Question 1 of 205eccef9cbacbc34ba4d45a0e

When the port power unit is started, as shown in the illustration, the unloading valve "C" __________. See illustration GS-0123.

Back

Question 1 of 20

5eccef9cbacbc34ba4d45a0e

When the port power unit is started, as shown in the illustration, the unloading valve "C" __________. See illustration GS-0123.

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed