正确答案: B

(1)+(3)

题目：Exhaust temperature increases in all cylinders, the possible cause may be（）(1) increased scavenging air temperature(2) air in fuel pumps and fuel valves(3) fouling of air and gas passages

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学习资料的答案和解析：

[单选题]Factor influencing the position of the interface between the liquid seal and the oil in a purifier is （）.

None of the above is wrong

[单选题]The viscosity regulator controls the （） of the fuel oil in order to provide the oil at the correct viscosity for combustion.

temperature