- A.scavenging
- B.forced draft
- C.turbo-charging
- D.aspiration
- A.suction
- B.exhaust
- C.pressure
- D.discharge
- A.in
- B.to
- C.from
- D.by
- A.reduce friction between moving surfaces
- B.provide even distribution of bearing wear
- C.reduce the accumulation of harmful detergents
- D.maintain a constant oil temperature output at each beating
- A.fuel spray; the burning of the fuel
- B.the burned gas mixture; connecting rod
- C.medium shaft; crankshaft
- D.the burned gas mixture; piston rod
- A.prevent the gear box from leaking
- B.prevent the oil from becoming inflammable
- C.make sure it has not become contaminated
- D.make sure the motor bearings are lubricated
- A.auto-ignition point
- B.flash point
- C.burning temperature
- D.fire point
- A.overlap
- B.crush
- C.lap or lead
- D.protrusion
- A.radially from the shaft
- B.parallel to each other and to the shaft
- C.parallel to each other but at a right angle to the shaft
- D.at an angle to each other and to the shaft
- A.an injection process
- B.an ejection process
- C.a separation process
- D.a heating process