In machinery space, the valves, pipes should be .
A.arranged as close to each other as possible to save space
B.arranged far away from each other for convenient operation
C.be fixed or clamped to avoid vibration
D.kept easy removable as to convenient repairing work
第1题
A.increase the density of the cylinder air charge
B.prevent turbocharger overheating
C.liminate the need for a pre-cooler
D.remove moisture from air compressed by the turbocharger
第2题
A.Security level 1
B.Security level 2
C.Security level 3
D.Highest safety level
第3题
A.should bring
B.should be brought
C.should take
D.should be taken
第4题
A.large dirt particles in the oil supply
B.insufficient lubricating oil and overheating
C.normal wear
D.water contamination of the lube oil
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