單項(xiàng)選擇題

Whether using a centrifuge or a simple filter, oil cleaning and filtration will be the most effective when the oil is at a （）.

A.high temperature and a high viscosity
B.high temperature and a low viscosity
C.low temperature and a high viscosity
D.low temperature and a low viscosity

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單項(xiàng)選擇題

Exhaust valve grooving and corrosion is caused by certain components of residual fuel oilThese components are sodium, sulfur, and （）.

A.vanadium
B.carbon
C.copper
D.ash

單項(xiàng)選擇題

Which of the following problems may occur if the opening pressure of a fuel injection nozzle is greater than specified by the engine manufacturer?（）

A.The amount of fuel injected will be increased
B.The start of injection will be retarded
C.The nozzle will permit fuel to dribble
D.The spray pattern will be distorted

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Whether using a centrifuge or a simple filter, oil cleaning and filtration will be the most effective when the oil is at a （）.

你可能感興趣的試題

Exhaust valve grooving and corrosion is caused by certain components of residual fuel oilThese components are sodium, sulfur, and （）.

Which of the following problems may occur if the opening pressure of a fuel injection nozzle is greater than specified by the engine manufacturer?（）