举一反三
- 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
- Temperature control valves installed in the jacket cooling water system of a diesel engine modulates the rate of water flow through the （）.
- A ____ is mounted on the lube oil cooler which senses the temperature of the lubricating oil and regulates the flow of either the lubricating oil or the cooling water accordingly. A: magnetic switch B: regulator C: thermostatic valve D: expansion valve
- The pH value of water in a diesel engine closed cooling water system should be maintained between （）.
- The most serious effect of air trapped in a diesel engine jacket water cooling system is that it（）.
内容
- 0
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.
- 1
In a refrigeration system, if the cooling water to the condenser fails, the（）. A: box temperature solenoid valve will close B: expansion valve will close C: compressor will shutdown D: king valve will ope
- 2
A two stroke diesel engine exhaust temperature will be lower than a four stroke diesel engine of the same displacement because the _____. ① MEP is lower and the scavenging air is cooling the exhaust gases ② valve overlap in a four stroke A.① B.② C.① and ② D.Neither ① nor ② is correct
- 3
The operating diesel generators will have their exhaust temperatures， cooling water and lubricating oil temperatures and pressures （） in much the same way as for the main engine.
- 4
Fresh water is used for the cooling of cylinder jackets and （） of the marine diesel engine.