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單項選擇題

Which of the following is a factor of fuel oil almost having nothing to do with the formation of combustion products?（）

A.setting point
B.ash
C.sulfur content
D.carbon residues

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單項選擇題

Which of the following firing order may be used for an 6 cylinder engine?（）

A.1-2-3-4-5-6
B.1-2-3-6-5-4
C.1-5-3-6-2-4
D.1-3-4-5-6-2

單項選擇題

Which of the following can be obtained by means of an indicator card?（）

A.the peak pressure in a cylinder
B.the temperature of the cooling water
C.the fuel consumption
D.none of the above