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单选题
Where is the cooling water from the compensating tank in the cooling water system of main engine lead to?（）
A
discharge side of the centrifugal pump
B
suction side of the centrifugal pump
C
the lowest point of the cooling water system
D
inlet of the main engine
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The compressed airB
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单选题（） allows for expansion and water make up in the water cooling system.A
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A head tankC
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考题
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heatC
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单选题In a closed cooling system for a turbocharged, four-stroke/cycle diesel engine, fluctuating water pressure can be caused by （）A
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单选题The expansion tank for a diesel engine closed cooling system is designed to maintain a constant head on the system and （）.A
reduce water temperatureB
reduce water turbulenceC
provide an air cushionD
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考题
单选题Expansion tank should be used to remove （） from cooling water.A
scaleB
sludgeC
chemicalsD
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考题
单选题The outlet from an expansion tank of a closed freshwater cooling system should be piped to the （）.A
cylinder head water outlet headerB
cylinder jacket inlet mainC
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jacket water pump suction line
考题
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考题
单选题When distilling salt water the cooling water discharging from the distiller is fed back to evaporator as feed water （）.A
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单选题The highest pressure in any closed diesel engine freshwater cooling system is at the （）.A
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raw water pump dischargeB
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考题
单选题Vents are led from the engine to head tank （） from the cooling water.A
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incomplete combustion in all cylinderC
overloading in all cylindersD
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考题
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limeB
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考题
单选题If the compressor-discharge temperature is higher than the receiver temperature（）A
increase the amount of cooling water to the condenserB
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单选题A rectangular fish tank has a base 2 feet wide and 3 feet long. When the tank is partially filled with water, a solid cube with an edge length of 1 foot is placed in the tank. If no overflow of water from the tank is assumed, by how many inches will the level of the water in the tank rise when the cube becomes completely submerged?A
1/6B
1/2C
2D
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