网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
单选题
Expansion tank should be used to remove （） from cooling water.
A
scale
B
sludge
C
chemicals
D
air
参考答案
参考解析
解析：
暂无解析
更多 “单选题Expansion tank should be used to remove （） from cooling water.A scaleB sludgeC chemicalsD air” 相关考题
考题
What is head tank in the closed cooling water system used for?A.for the release of air from the cooling waterB.providing expansion room for heated cooling waterC.a place for implementing water and water treatment agentD.all of the above
考题
An alarm device inserted between the deaerating tank and the expansion tank can notify the on-watching crew that .A.the expansion tank is lack of waterB.the expansion tank is over flowingC.there is something wrong with the cooling systemD.there is something wrong with the engine
考题
In a diesel engine closed freshwater cooling system, the amount of coolant flowing through the heat exchanger is controlled by the __.A.suction pressure regulatorB.thermostatic bypass valveC.sea water temperatureD.water level in the expansion tank
考题
Which of the following is the MOST important factor when considering environmental factors?()
A. Server room access should be limited to authorized personnel.B. Servers should be kept in a warm and dark environment.C. Remove the floppy drives from the system.D. The server administrator should ensure adequate levels of cooling.
考题
_____ allows for expansion and water make up in the water cooling system.A.A top tankB.A head tankC.A head valveD.A drain tank
考题
Which of the following is the MOST important factor when considering environmental factors?（）A、Server room access should be limited to authorized personnel.B、Servers should be kept in a warm and dark environment.C、Remove the floppy drives from the system.D、The server administrator should ensure adequate levels of cooling.
考题
单选题In a commonly used fuel oil system, the oil is stored in tanks in the double bottom from which it is pumped to （） and heated.A
a service tankB
a settling tankC
an expansion tankD
a double bottom tank
考题
单选题Which of the following statements describes the function of an expansion tank in a diesel engine cooling system?（）A
Maintains a constant head on the systemB
Reduces the likelihood of air or steam pockets formationC
Provides a low pressure point for the addition of makeup cooling waterD
All of the above
考题
单选题What is head tank in the closed cooling water system used for?（）A
for the release of air from the cooling waterB
providing expansion room for heated cooling waterC
a place for implementing water and water treatment agentD
all of the above
考题
单选题Which of the following is the MOST important factor when considering environmental factors？（）A
Server room access should be limited to authorized personnel.B
Servers should be kept in a warm and dark environment.C
Remove the floppy drives from the system.D
The server administrator should ensure adequate levels of cooling.
考题
单选题A separate piston cooling system is used （） any contamination from piston cooling glands to the piston cooling system only.A
to helpB
to limitC
to protectD
to remove
考题
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 pumpB
suction side of the centrifugal pumpC
the lowest point of the cooling water systemD
inlet of the main engine
考题
单选题（） allows for expansion and water make up in the water cooling system.A
A top tankB
A head tankC
A head valveD
A drain tank
考题
单选题Vents are led from the engine to the head tank for the release of （） from the cooling water.A
airB
heatC
sludgeD
steam
考题
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 systemB
carrying the expansion tank water level too highC
a totally clogged impeller in the cooling water pumpD
an incorrectly set cooling system temperature control
考题
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
allow for an increase in water volume as the engine warms up
考题
单选题The expansion tank in a diesel engine closed freshwater cooling system is located at （）A
the highest point in the systemB
the lowest point in the systemC
near the floorD
plate level or near the tank top level
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
heat exchanger inlet connectionD
jacket water pump suction line
考题
单选题If the water level dropped rapidly in the expansion tank of a closed diesel engine cooling water system, you should suspect a （）.A
loss of suction in the circulating pumpB
leak in the primary cooling systemC
broken raw water pump shaftD
burned or cracked piston in one cylinder
考题
单选题In a closed diesel engine freshwater cooling system, the amount of coolant flowing through the heat exchanger is controlled by the （）.A
suction pressure regulatorB
thermostatic bypass valveC
sea water temperatureD
water level in the expansion tank
考题
单选题Which of the listed statements is correct concerning refrigeration systems?（）A
Dehydrators must be used continuously in a refrigeration systemB
A 25 ton refrigeration system has the same cooling effect as melting 25 tons of ice in 24 hoursC
A thermostatic expansion valve is used to control refrigerated space temperatureD
The liquid receiver functions to collect and remove non- condensable gases
考题
单选题The piston cooling system may employ similar components, except that a drain tank is used instead of a head tank That means this system （）.A
doesnt use a drain tank but a head tankB
uses a drain tank not head tankC
uses a drain tank and a head tankD
uses neither a drain tank nor a head tank
考题
单选题The piston cooling system may employ similar components, except that （） is used instead of a head tank.A
a sump tankB
a feed wellC
a double bottom tankD
a drain tank
考题
单选题Vents are led from the engine to head tank （） from the cooling water.A
for the release of airB
for the release of waterC
in order to the release of airD
because the release of air
考题
单选题It is necessary to remove （） from the cooling water spaces to improve heat transfer.A
limeB
frostC
scaleD
scar
热门标签
最新试卷