A diesel engine produces pronounced combustion knock along with white smoke emission. Which of the following is the more likely cause?

A. High sulfur fuel.
B. Advanced fuel injection timing.
C. Out of balance fuel injection system.
D. Air leak in suction side of the fuel subsytem system.


Answer: D

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A single drop of water contains about ____ atoms.

A. 1000 B. 100,000 C. 10 million D. 100 billion

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The atom is normally electrically ____________

A. neutral B. positive C. negative D. charged

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Compare heat-transfer rates through layers of human skin, human muscle, and human fat tissue. Assume a 5-mm-thickness and a temperature difference of 2 ÂșC across each layer.

What will be an ideal response?

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Which type of fuel systems are most sensitive to dirt intrusion?

A. Hydraulic B. Vented. C. Self priming. D. Common rail (CR)

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