On a diesel engine with direct-cylinder...

Question 1 / 270705eccefa3bacbc34ba4d47d73

Question 1 of 270705eccefa3bacbc34ba4d47d73

On a diesel engine with direct-cylinder admission air starting, a leaking air starting valve would be indicated by __________.

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Question 1 of 27070

On a diesel engine with direct-cylinder admission air starting, a leaking air starting valve would be indicated by __________.

🔍 Key Concepts

• Direct-cylinder admission air starting systems and how starting valves operate • What happens inside a cylinder if high-pressure starting air leaks past a starting valve during normal engine operation • Typical symptoms of local overheating vs. combustion-related problems

💭 Think About

• Ask yourself: if high‑pressure starting air leaks into a firing cylinder, will that mainly affect temperature of the external piping, the combustion process inside the cylinder, or the exhaust system? • Think about when the air starting system is pressurized: what part of the system would show a continuous temperature rise if air were flowing when it shouldn’t? • Which options describe long‑term combustion deposits, and which describe an immediate mechanical/thermal symptom tied directly to the air starting line?

✅ Before You Answer

• Identify which choice is directly related to the starting air line and valve location, not to general combustion quality • Separate long-term effects (like deposits from poor combustion) from short-term, localized overheating effects • Consider which component would be exposed to continuous high‑pressure air flow if a starting air valve does not close fully

Question 1 of 27070

On a diesel engine with direct-cylinder admission air starting, a leaking air starting valve would be indicated by __________.

an overheated starting air supply pipe

excessive smoke from the engine exhaust

carbon deposit on the exhaust valves

early fuel ignition

Question 1 / 270705eccefa3bacbc34ba4d47d73

Question 1 of 270705eccefa3bacbc34ba4d47d73

On a diesel engine with direct-cylinder admission air starting, a leaking air starting valve would be indicated by __________.

Back

Question 1 of 27070

On a diesel engine with direct-cylinder admission air starting, a leaking air starting valve would be indicated by __________.