更多"（）reters to be amount of water vapo"的相关试题:
[单项选择]An excessive amount of water is prevented from entering a vessel using a water lubricated stern tube bearing by the use of the （）.
A. propeller hub
B. lignum vitae
C. shaft packing
D. labyrinth seal
[单项选择]The amount of chloride content in the water of an auxiliary boiler can be reduced by（）
A. adding hydrazine
B. blowing down the boiler
C. adding phenolphthalein
D. adding a sulfite chloride scavenger
[单项选择]When distilling salt water the cooling water discharging from the distiller is fed back to evaporator as feed water （）.
A. to cut down the amount of cooling water needed
B. to prevent an excess amount of cooling water from being discharged to the bilges
C. to supply hot water to the evaporator for more economical operation
D. None of the above is tree
[单项选择]When distilling sea water the cooling water discharging from the distiller is fed back to evaporator as feed water （）.
A. to decrease scale formation
B. for better cooling effect
C. for more economical purpose
D. to raise vacuum
[单项选择]A water pump can not supply water after startingIt may be caused by （）.
A. closed discharge valve
B. broken pipe line
C. worn shaft
D. both A and B
[单项选择]After stopping oily water separator, sea water should be permitted for （） minutes,（）should be closed after stopping pump to reduce oxidation corrosion of inner wall.
A. 15；inlet value
B. 15；inlet and outlet value
C. 30；inlet value
D. 30；inlet and outlet value
[单项选择]The water level showing in a boiler water gauge glass is usually （） during working.
A. higher than the actual drum water level
B. equal to the actual drum water level
C. increasing due to steam condensation in the glass
D. lower than actual drum water level
[单项选择]The fresh water generator produces fresh water （）.
A. by cooling sea water
B. by heating sea water
C. by evaporation of sea water
D. by purifying sea water
[单项选择]（） water is more expensive than fresh water It has high specific heat and low viscosity.
A. Distilled
B. Distilling
C. Boiling
D. Boiled
[单项选择]The oil （） in the discharging water from oil water separator exceeds 15 PPM without alarm, because the coil was burnt out.
A. filter
B. hole
C. pollution
D. content
[单项选择]（） is the production of pure water from sea water by evaporation and re-condensing.
A. Evaporation
B. Circulation
C. Condensation
D. Distillation
[单项选择]We use （） to distill fresh water from sea water.
A. engine
B. sea water pump
C. cylinder cooler
D. fresh water generator
[单项选择]Farmers use water in many ways.（） they use water to grow crops.
A. In fact
B. For example
C. Besides
D. Because of this
[单项选择]（）water is the water in the hold to keep the ship’s stability.
A. Bilge
B. Ballast
C. Slop
D. Sanitary
[单项选择]The minimum amount of lifesaving equipment required aboard an 85-foot uninspected towing vessel consists of（）.
A. one approved flotation cushion for each person on board
B. one approved life preserver for each person on board and one life ring
C. one approved inflatable vest for each person on board
D. lifeboat capacity equal to 1 1/2 times the number of persons on board
[单项选择]What amount of cell overlap ensures smooth roaming for wireless endpoints?（）
A. 5；10%
B. 10；15%
C. 15；20%
D. 20；25%
[单项选择]The amount and accuracy of the information provided on the different charts（）considerably.
A. varies
B. maintains
C. Shifts
D. assembles
[单项选择]Compared to the amount of concentrated foam liquid used，the amount of low expansion mechanical foam produced is（）.
A. 97 times greater
B. 94 times greater
C. 10 times greater
D. 2 times greater
