Cams used to activate mechanically operated...

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Question 1 of 205eccefa3bacbc34ba4d47d49

Cams used to activate mechanically operated air starting valves on four-stroke/cycle diesel engines should have which of the valve lift profiles listed?

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5eccefa3bacbc34ba4d47d49

Cams used to activate mechanically operated air starting valves on four-stroke/cycle diesel engines should have which of the valve lift profiles listed?

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🔍 Key Concepts

• Cam profile and valve motion in four-stroke diesel starting air systems • Effects of shock loading vs gradual loading on valve seats and stems • Need for sufficient open duration to admit starting air without damaging components

💭 Think About

• Think about what happens to the valve and its seat if it is slammed open and shut repeatedly during starting. Which profile would reduce impact and wear? • Starting air must flow long enough and smoothly enough to turn the engine. Which profiles give adequate open time and controlled motion? • Compare which option combines both protection of the mechanical parts and enough time at or near full lift for effective starting air admission.

✅ Before You Answer

• Which choice avoids sudden impact on opening and on seating of the valve? • Which choice provides enough time at or near full lift for starting air to be effective? • Which profile would most likely reduce maintenance issues such as valve seat pitting and stem bending over time?

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Question 1 of 205eccefa3bacbc34ba4d47d49

Cams used to activate mechanically operated air starting valves on four-stroke/cycle diesel engines should have which of the valve lift profiles listed?

Back

Question 1 of 20

5eccefa3bacbc34ba4d47d49

Cams used to activate mechanically operated air starting valves on four-stroke/cycle diesel engines should have which of the valve lift profiles listed?

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