Cert III Mobile Plant Practice Questions - Certificate III In Mobile Plant Technology (AUR31220) Exam

How does a Jacobs engine brake (Jake brake) produce deceleration force in a heavy diesel engine?

By restricting exhaust gas flow in the exhaust manifold By cutting off fuel supply and turning the engine into a standard air pump By opening the exhaust valves near the top of the compression stroke to release compressed air By using a hydraulic retarder on the flywheel to slow the crankshaft

Correct Answer:

By opening the exhaust valves near the top of the compression stroke to release compressed air

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