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
It is obvious that the expansion of the water （）the increase of its temperature.
A
is due to
B
dues to
C
is because
D
is for
参考答案
参考解析
解析：
暂无解析
更多 “单选题It is obvious that the expansion of the water （）the increase of its temperature.A is due toB dues toC is becauseD is for” 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
The main propulsion diesel engine jacket water temperature rises above normal, with the raw sea suction and the expansion tank water level being normal. Which of the following problems is most likely the cause?A.Faulty thermostatic bypass valveB.Eroded zinc pencils in the heat exchangerC.Steam formation in the expansion tankD.Excessive leakage from jacket water pump seals
考题
Because the circulating water is in a closed loop,_______is installed to cater for expansion and contraction of the water at different conditions of operation.A.an expansion jointB.a drain tankC.a head tankD.a contraction tank
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
One of the more__________ results of the price increase was an initial drop in sales.A.confusing
B.beneficial
C.respected
D.obvious
考题
Which of the following expansion cards would be necessary to increase fault tolerance in a VoIP server?（）A、Second ModemB、Second CPUC、Second HBAD、Second PBX card
考题
Which of the following uses compression/decompression to increase the memory available for client workloads?（）A、PowerVMB、VMControlC、Active Memory SharingD、Active Memory Expansion
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If separating effect is not good, which measure should be taken （）A
working at intervals and properly heatingB
warming up to 70℃, increase water supply flowC
improving impulse of water supplyD
reducing water supply flow
考题
单选题The device allowing for the change in volume of the cooling water in a propulsion diesel engine closed cooling system is the （）.A
fresh water expansion tankB
sea water expansion tankC
thermostatic expansion valveD
jacket water cooler accumulator
考题
单选题A three-way thermostatic control valve regulates the diesel engine cooling water temperature by passing a portion of the water （）.A
around the engineB
around the coolerC
to the expansion tankD
overboard
考题
单选题Which of the listed operations will cause an automatically controlled refrigeration compressor to restart?（）A
Closing of the solenoid valveB
Closing of the expansion valveC
An increase in the suction pressureD
Decreasing the suction pressure
考题
单选题If the jacket water temperature of an operating diesel engine suddenly rises above normal, the cause can be attributed to （）.A
an overfilled expansion tankB
excess chromate treatment of the jacket waterC
a clogged raw water sea suctionD
cavitation erosion of the heat exchanger tubes
考题
单选题The main propulsion diesel engine jacket water temperature rises above normal, with the raw water sea suction and the expansion tank water level being normalWhich of the following problems is most likely the cause?（）A
Faulty thermostatic bypass valveB
Eroded zinc pencils in the heat exchangerC
Steam formation in the expansion tankD
Excessive leakage from jacket water pump seal
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If the compression ratio is increased on any diesel engine, （）A
the expansion ratio will decreaseB
combustion will be slowed downC
thermal efficiency will decreaseD
thermal efficiency will increase
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Expansion tank should be used to remove （） from cooling water.A
scaleB
sludgeC
chemicalsD
air
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A definite advantage of using water as a fire extinguishing agent is its characteristic of（）.A
alternate expansion and contraction as water in a liquid state becomes a vaporB
absorption of smoke and gases as water is converted from a liquid to a vaporC
rapid contraction as water is converted from a liquid to a vaporD
rapid expansion as water absorbs heat and changes to steam
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When the heat load begins to increase, the needle valve of an expansion valve will（）A
move in an opening directionB
move in a closing directionC
either open or closeD
not move at all
考题
单选题How dose water enter the crankcase of a diesel engine?（）A
Through the crankcase exhausterB
As water vapor contained in blow-byC
Demulsifying lube oil passing through the main bearingsD
Condensation from vapor formed in the expansion tank
考题
单选题While troubleshooting a refrigeration system for low head pressure, liquid refrigerant flooding back from the evaporator is determined to be the causeIt may be necessary to （）.A
change the expansion valve adjustmentB
readjust the water regulating valve to increase the flow of waterC
purge air from the condenserD
clean the waterside of the condenser
考题
单选题There is （） in any water cooling system for a diesel engine allowing for expansion and water make-up in the system as well as air vent and chemicals addition.A
a setting tankB
a service tankC
a head tankD
an expansion joint
考题
单选题Which of the following conditions will develop if the flow of ‘raw’ cooling water to diesel engine is obstructed?（）A
Air will enter the cooling systemB
Carbon will plug the water cooled exhaust manifoldsC
The jacket water temperature will riseD
The lube oil viscosity will increase
热门标签
最新试卷