Cooling Water的中文含义是（）。

相似题目

• Those generally used additives for cooling water are either anti-corrosion oils or inorganic（）.

  A . gases B . paints C . inhibitors D . detergent

  查看最佳答案

• The pH value of water in a diesel engine closed cooling water system should be maintained between （）.

  A . 60 to75 B . 80 to 95 C . 100 to 115 D . 120 to 135

  查看最佳答案

• Expansion tank should be used to remove （） from cooling water.

  A . scale B . sludge C . chemicals D . air

  查看最佳答案

• 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

  查看最佳答案

• In a refrigeration system, if the cooling water to the condenser fails, the（）.

  A . box temperature solenoid valve will close B . expansion valve will close C . compressor will shutdown D . king valve will ope

  查看最佳答案

• In a diesel engine cooling water system, a pH of 60 indicates a/an （）.

  A . slightly acidic condition B . slightly alkaline condition C . overtreatment of water D . neutral condition of water

  查看最佳答案

• In a closed cooling water system, which of the problems can cause the water pressure to fluctuate?（）

  A . An open vent in the cooling system B . A fouled sea chest C . A restricted water passage in the engine D . Air entrained in the cooling water

  查看最佳答案

• The cooling water temperature （） over a period of 8 hours, and then shut down.

  A . should be gradually increased B . should be gradually reduced C . should be constantly kept D . should be varied up and dow

  查看最佳答案

• The cooling water of the diesel engine should be treated, because it has（）

  A . alkale scence B . acidity C . salinity D . impurity

  查看最佳答案

• A three-way thermostatic control valve regulates the diesel engine cooling water temperature by passing a portion of the water （）.

  A . around the engine B . around the cooler C . to the expansion tank D . overboard

  查看最佳答案

• Fresh water is used for the cooling of cylinder jackets and （） of the marine diesel engine.

  A . cylinder covers B . lubricating space C . crosshead D . exhaust manifold

  查看最佳答案

• One of the purposes for water cooling the exhaust manifold in marine diesel engine is to （）

  A . reduce lube oil temperature B . raise exhaust temperature reduce C . excessive heating of engine room D . reduce load on cooling water pum

  查看最佳答案

• （） allows for expansion and water make up in the water cooling system.

  A . A top tank B . A head tank C . A head valve D . A drain tank

  查看最佳答案

• A diesel engine cooling water system with a pH factor of 30 indicates a condition of （）.

  A . slight acidity B . slight alkalinity C . excessive alkalinity D . excessive acidity

  查看最佳答案

• The jacket water temperature in a diesel engine closed freshwater cooling system is normally controlled by （）

  A . regulating the level of corrosion inhibitor in the primary cooling system B . the level of the freshwater expansion tank C . varying the engine load to meet temperature requirements D . the operation of the thermostatic valve

  查看最佳答案

• In the closed cooling system, the water （）.

  A . is made to circulate out of the system B . is made to circulate within the system C . is made circulate within the system D . is made circulate out of the system

  查看最佳答案

• About half an hour before the engine is required, cooling water at （） must be circulated.

  A . more than the working temperature B . less than the working temperature C . the working temperature D . the same as the surrounding temperature

  查看最佳答案

• During the running of the diesel engine, if the supply of cooling water is interrupted or the temperature of cooling water out of the cylinder is too high, the duty engineer should （）

  A . notify the duty officer, reduce the engine speed, take some measures to remove failures B . notify the duty officer and stop the engine immediately, find the cause and remove failures C . notify the C/E D . notify the captai

  查看最佳答案

• Which of the following may cause that excessively warm water leaves the condenser in a refrigeration plant? （） (1) too little cooling water (2) too much cooling water (3) too warm cooler water

  A . （1）only B . anyof（1），（2）and（3） C . anyof（1）and（3） D . anyof（1）and（2）

  查看最佳答案

• High diesel engine cooling water temperatures can be caused by （）.

  A . a worn water pump B . not enough coolant C . air in the cooling system D . all of the above

  查看最佳答案

• Which of the following statements is correct concerning diesel engine cooling water systems?（）

  A . Each engine must have its own engine driven cooling water pump capable of providing cooling for all ranges of operation B . propulsion engines with bores exceeding 200 mm are to be fitted with a means to display the cooling water temperature of each cylinder C . At least two independent sea suctions are to be provided for supplying water to the engine jackets or to the heat exchangers D . Suitable strain are to be fitted between the circulating pumps and heat exchangers when sea water is used for direct cooling

  查看最佳答案

• Some diesel engines are fitted with a thermometer in the cooling water outlet from each cylinderIf the cooling water temperature from all cylinders begins to rise above normal, you should suspect （）

  A . increase blow-by in all cylinders B . incomplete combustion in all cylinder C . overloading in all cylinders D . insufficient fuel delivery to all cylinder

  查看最佳答案

• Large quantities of water ____________cooling purposes.

  A、are needed for B、is needed to C、are need to D、is need for

  查看最佳答案

• Which of the following may cause that excessively warm water leaves the condenser in a refrigeration plant？ (1) too little cooling water; (2) too much cooling water; (3) too warm cooler water.

  A.(1) only B.any of (1), (2) and (3) C.any of (1) and (3) D.any of (1) and (2)

  查看最佳答案