單項(xiàng)選擇題

An instrument that indicates wind direction is known as a(n)（）.

A.weather vane，wind vane or wind sock
B.hydrometer
C.hygrometer
D.sling psychrometer

你可能感興趣的試題

All of the following steps are taken in starting a centrifugal pump，EXCEPT to（）.

A.set the relief valve
B.check the lubrication system
C.vent the pump casing
D.open the pump suction and discharge valves

單項(xiàng)選擇題

After an engine is started you should（）.

A.increase engine speed to insure adequate flow of oil to all parts of the engine
B.pay no attention unless there are unusual noises from the engine
C.check operating pressures and temperatures，and check for leaks
D.run the engine at idle until the temperature has increased

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An instrument that indicates wind direction is known as a(n)（）.

你可能感興趣的試題

All of the following steps are taken in starting a centrifugal pump，EXCEPT to（）.

After an engine is started you should（）.

All of the following steps are taken in starting a centrifugal pump，EXCEPT to（）.