AME 6 Q3

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Question 4: What tool should be used to check for excessive blow-by gases that might be contributing to high crankcase pressure?

C) Oil temperature sensor

A) Digital pressure gauge

D) Exhaust gas analyzer

B) Cylinder compression tester

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Question 3: What additional investigation should be conducted if crankcase pressure remains high despite checking the ventilation system and seals?

A) Inspect the oil pump for malfunctions

C) Test the fuel injectors for proper operation

B) Examine the piston rings and cylinder walls for wear or damage

D) Check the alternator for faults

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Checks and Investigations for Increased Crankcase Pressure

Question 1: What is the first step an engineer should take when investigating increased crankcase pressure?

D) Verify the engine’s coolant level

C) Replace the engine oil filter

A) Inspect the fuel system for leaks

B) Check the crankcase ventilation system for blockages or malfunctions

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Question 2: If the crankcase pressure is high, what should be checked to ensure proper sealing and pressure control?

B) Engine gaskets and seals

A) Air filter condition

C) Turbocharger operation

D) Radiator efficiency

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High Crankcase Pressure Implications and Actions

Question: If the daily engine log shows that the engine crankcase pressure gauge is indicating a much higher value than the normal reading, what are the implications and immediate actions that should be taken?

D) The increased pressure is usually due to low oil levels; top up the engine oil and restart the engine.

A) The engine may be operating normally; no immediate action is required. Continue to monitor.

C) High crankcase pressure typically results from a faulty fuel pump; replace the fuel pump immediately.

B) High crankcase pressure may indicate potential issues such as excessive blow-by or ventilation problems; immediately shut down the engine and inspect the crankcase ventilation system and seals.

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Question 5: What is a potential consequence of not addressing high crankcase pressure promptly?

B) Enhanced fuel economy

D) Reduced engine noise

A) Improved engine efficiency

C) Risk of engine damage and potential failure

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