In the closed cooling system, the water ().
- Ais made to circulate out of the system
- Bis made to circulate within the system
- Cis made circulate within the system
- Dis made circulate out of the system
In the closed cooling system, the water ().
1、Cavitation erosion in the cooling wate
Cavitation erosion in the cooling water system of a diesel engine usually occurs at the pump impeller, and on the waterside of the ()Afuel nozzle holdersBexhaust value guidesCengine cylinder linersDlow temperature and a low viscosity
2、The cooling water is in direct contact
The cooling water is in direct contact with the outer surface of the liner as a result of which it is termed a ().Awater linerBwet linerCdry linerDdrown liner
3、In a refrigeration system, if the cool
In a refrigeration system, if the cooling water to the condenser fails, the().Abox temperature solenoid valve will closeBexpansion valve will closeCcompressor will shutdownDking valve will ope
4、In a closed cooling water system, whic
In a closed cooling water system, which of the problems can cause the water pressure to fluctuate?()AAn open vent in the cooling systemBA fouled sea chestCA restricted water passage in the engineDAir entrained in the cooling water
5、Pitting in the area close to the pitch
Pitting in the area close to the pitch line and on the same end of each gear tooth of a reduction gear unit would be caused by ()Acorrosion on the gearsBexcessive gear speedCdirt in the oilDmisalignment of the gear
6、The closed-loop system differs from th
The closed-loop system differs from the open-loop system by()Athe lack of a feedbackBthe presence of a feed backCthe lack of a computerDthe presence of a computer