單項(xiàng)選擇題

When preparing an engine for water temperature（）

A.should be kept at a proper level by a cooler
B.should be raised to about 80℃ by a heater
C.should be raised gradually
D.should be lowered to about 60℃

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單項(xiàng)選擇題

When stand-by engine instructions have been received, it’s necessary to make it sure that all valves in the various systems are（）

A.operational
B.open
C.closed securely
D.at middle position

單項(xiàng)選擇題

The monitoring function may serve all of the following purposes except（）

A.instigating corrective action
B.indicating values of controlled variables
C.warning of off-limit conditions
D.providing record of performance

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When preparing an engine for water temperature（）

你可能感興趣的試題

When stand-by engine instructions have been received, it’s necessary to make it sure that all valves in the various systems are（）

The monitoring function may serve all of the following purposes except（）