The pH value of water in a diesel engine closed cooling water system should be maintained between （）.
B
举一反三
- 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.
- Temperature control valves installed in the jacket cooling water system of a diesel engine modulates the rate of water flow through the （）.
- The most serious effect of air trapped in a diesel engine jacket water cooling system is that it（）.
- In the closed cooling system， the water （）.
- The highest pressure in any closed diesel engine freshwater cooling system is at the （）.
内容
- 0
A three-way thermostatic control valve regulates the diesel engine cooling water temperature by passing a portion of the water _____.
- 1
The expansion tank for a diesel engine closed cooling system is designed to maintain a constant head on the system and （）.
- 2
Which of the following problems can cause fluctuating pressures in the closed cooling system of a main propulsion diesel engine?（）
- 3
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 coole C: to the expansion tank D: overboard
- 4
Fresh water is used for the cooling of cylinder jackets and （） of the marine diesel engine.