For a continuous operation diesel engine, a duplex filter unit would be the best arrangement because （）.
1、The pH value of water in a diesel engi
The pH value of water in a diesel engine closed cooling water system should be maintained between （）.A60 to75B80 to 95C100 to 115D120 to 135
2、When fuel is injected in a diesel engi
When fuel is injected in a diesel engine cylinder too early, （）Aignition may be delayedBfuel economy is not affectedCexhaust gas temperature will be unchangedDthe exhaust will be clear
3、Defective timing gear in a diesel engi
Defective timing gear in a diesel engine may lead to （）.Asmoky exhaustBstarting failureCoverloadDover speed
4、The process of supplying a diesel engi
The process of supplying a diesel engine cylinder with air at a pressure greater than atmospheric is called（）.Aengine displacementBsuper-aspiratingCair injectionDsupercharging
5、The main moving parts of a diesel engi
The main moving parts of a diesel engine consist of the （） and the pistons.Abedplate, connecting rodsBcrankshaft, the connecting rodsCframes, crossheadsDcrankshaft, the cylinder
6、When installing rings on a diesel engi
When installing rings on a diesel engine piston, you should check the ring（）Adiametrical tensionBgap clearanceCradial thicknessDface thickne