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参考答案：
举一反三
【单选题】Which of the following problems can cause fluctuating pressures in the closed cooling system of a main propulsion diesel engine?
A.
Defective temperature controls in the system
B.
Cavitation in the cooling water pump
C.
Opened vent in the cooling system
D.
Restricted water passages in the engine
查看完整题目与答案
【单选题】In a diesel engine closed freshwater cooling system, the amount of coolant flowing through the heat exchanger is controlled by the __.
A.
suction pressure regulator
B.
thermostatic bypass valve
C.
sea water temperature
D.
water level in the expansion tank
查看完整题目与答案
【多选题】政府限价,则( )
A.
政府把价格限制在均衡水平以下可能导致商品短缺,供不应求
B.
政府把价格限制在均衡水平以上可能导致商品过剩,供大于求
C.
政府把价格限制在均衡水平以上可能导致商品短缺,供不应求
D.
政府把价格限制在均衡水平以下可能导致商品过剩,供大于求
查看完整题目与答案
【判断题】ROI= return on sales / capital turnover.
A.
正确
B.
错误
查看完整题目与答案
【单选题】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
查看完整题目与答案
【单选题】What is head tank in the closed cooling water system used for?
A.
for the release of air from the cooling water
B.
providing expansion room for heated cooling water
C.
a place for implementing water and water treatment agent
D.
all of the above
查看完整题目与答案
【单选题】In a closed cooling system for a turbocharged, four-stroke/cycle diesel engine, fluctuating water pressure can be caused by .
A.
improper venting of the cooling system
B.
carrying the expansion tank water level too high
C.
a totally clogged impeller in the cooling water pump
D.
an incorrectly set cooling system temperature control
查看完整题目与答案
【单选题】Operating a diesel engine for prolonged periods, with a closed freshwater cooling system, at temperatures lower than the normal design temperature can cause _____.
A.
the formation of sulfuric acid
B.
a decrease in lube oil viscosity
C.
a decrease in cooling water pH
D.
a thermostat failure
查看完整题目与答案
【多选题】政府限价,则( )。
A.
政府把价格限制在均衡水平以下可能导致商品短缺，供不应求
B.
政府把价格限制在均衡水平以上可能导致商品过剩，供过于求
C.
政府把价格限制在均衡水平以上可能导致商品短缺，供不应求
D.
政府把价格限制在均衡水平以下可能导致商品过剩，供过于求
查看完整题目与答案
【单选题】In any diesel engine closed freshwater cooling system, the lowest pressure exists at the _____.
A.
jacket water outlet
B.
cooling water pump outlet
C.
heat exchanger outlet
D.
expansion tank atmospheric vent
查看完整题目与答案
相关题目：
【单选题】Which of the following problems can cause fluctuating pressures in the closed cooling system of a main propulsion diesel engine?
A.
Defective temperature controls in the system
B.
Cavitation in the cooling water pump
C.
Opened vent in the cooling system
D.
Restricted water passages in the engine
查看完整题目与答案
【单选题】In a diesel engine closed freshwater cooling system, the amount of coolant flowing through the heat exchanger is controlled by the __.
A.
suction pressure regulator
B.
thermostatic bypass valve
C.
sea water temperature
D.
water level in the expansion tank
查看完整题目与答案
【多选题】政府限价,则( )
A.
政府把价格限制在均衡水平以下可能导致商品短缺,供不应求
B.
政府把价格限制在均衡水平以上可能导致商品过剩,供大于求
C.
政府把价格限制在均衡水平以上可能导致商品短缺,供不应求
D.
政府把价格限制在均衡水平以下可能导致商品过剩,供大于求
查看完整题目与答案
【判断题】ROI= return on sales / capital turnover.
A.
正确
B.
错误
查看完整题目与答案
【单选题】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
查看完整题目与答案
【单选题】What is head tank in the closed cooling water system used for?
A.
for the release of air from the cooling water
B.
providing expansion room for heated cooling water
C.
a place for implementing water and water treatment agent
D.
all of the above
查看完整题目与答案
【单选题】In a closed cooling system for a turbocharged, four-stroke/cycle diesel engine, fluctuating water pressure can be caused by .
A.
improper venting of the cooling system
B.
carrying the expansion tank water level too high
C.
a totally clogged impeller in the cooling water pump
D.
an incorrectly set cooling system temperature control
查看完整题目与答案
【单选题】Operating a diesel engine for prolonged periods, with a closed freshwater cooling system, at temperatures lower than the normal design temperature can cause _____.
A.
the formation of sulfuric acid
B.
a decrease in lube oil viscosity
C.
a decrease in cooling water pH
D.
a thermostat failure
查看完整题目与答案
【多选题】政府限价,则( )。
A.
政府把价格限制在均衡水平以下可能导致商品短缺，供不应求
B.
政府把价格限制在均衡水平以上可能导致商品过剩，供过于求
C.
政府把价格限制在均衡水平以上可能导致商品短缺，供不应求
D.
政府把价格限制在均衡水平以下可能导致商品过剩，供过于求
查看完整题目与答案
【单选题】In any diesel engine closed freshwater cooling system, the lowest pressure exists at the _____.
A.
jacket water outlet
B.
cooling water pump outlet
C.
heat exchanger outlet
D.
expansion tank atmospheric vent
查看完整题目与答案
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