單項(xiàng)選擇題Some diesel engines are supercharged with a （）

A.slam charger
B.turbocharger
C.fuel atomizer
D.fuel injector


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1.單項(xiàng)選擇題Metal particles accumulated from the wearing of components in a diesel engine can result from lube oil that has been contaminated with（）.

A.abrasive particles
B.metallic oxides
C.corrosive acids
D.any or all of the above

2.單項(xiàng)選擇題In a diesel engine, late fuel injection is indicated by black or gray exhaust smoke with（）

A.low firing pressure
B.low exhaust temperature
C.mechanical knock in each cylinder
D.fuel knock in each cylinder

3.單項(xiàng)選擇題The cylinder liner forming the cylinder wall and the inside of the water jacket is called a（）

A.dry liner
B.wet liner
C.jacket liner
D.corrugated liner

4.單項(xiàng)選擇題Which of the listed devices could be used as a substitute for a ring grooving tool?（）

A.Steel brush
B.Fine emery cloth or steel wool
C.A section of the removed compression ring
D.A case hardened scraper

5.單項(xiàng)選擇題In which of the scavenging methods listed will the exhaust valve be located in the cylinder head?（）

A.Return-flow
B.Uniflow
C.Cross-flow
D.Direct flow