单项选择题
A.abrasive particles B.metallic oxides C.corrosive acids D.any or all of the above
In a diesel engine, late fuel injection is indicated by...
单项选择题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
The cylinder liner forming the cylinder wall and the in...
单项选择题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
Which of the listed devices could be used as a substitu...
单项选择题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
