举一反三
- What’s the main purpose of the servo fuel heater on CFM56-3 engine? ( ) A: To decrease the supply oil temperature B: To increase the servo fuel temperature C: To decrease the scavenge oil temperature D: To increase the combustion fuel temperature
- The aphotic zone (bottom of the ocean) will have ____ and ____ while the photic zone (surface of the ocean) will have ____ and ____. A: low temperature, low salinity; high temperature, high salinity B: low temperature, high salinity; high temperature, low salinity C: high temperature, high salinity; low temperature, low salinity D: high temperature, low salinity; low temperature, high salinity E: both have equal temperature and salinity
- 3.Coolant temperature: means the coolant temperature is too high or the coolant level is too low．
- Dirt in the fuel oil system of a diesel engine can cause （）. A: clogged filters B: poor combustion C: overloading of the diesel D: shock of fuel line
- The fuel oil system for a diesel engine can be considered in two<br/>parts---- the fuel supply and the ()systems A: fuel purification B: fuel combustion C: fuel treatment D: fuel injection
内容
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As to the low speed diesel engine， if you want to change the coolant flow for a certain cylinder， you can regulate （）.
- 1
Auto-tempering occurs after welding when （ ）. A: carbon content of weld is low B: cooling rate is slow C: peak temperature is high D: Ms is high
- 2
If △H value of a reaction is positive, the conditions that must be a spontaneous process is(). A: △S value is positive and high temperature B: △S value is positive and low temperature C: △S value is negative and high temperature D: △S value of is negative and low temperature
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Auto instruments include ____. A: speedometer B: coolant temperature gauge C: tachometer D: fuel gauge
- 4
One of function of diesel engine lubricating oil is to （） A: induce carbon formation on cylinder walls B: improve fuel penetration in the combustion space C: form a friction reducing film between mating surfaces D: lubricate the fuel injectio