单项选择题
A.running-in B.running-out C.running on D.running down
For auxiliary engines the permissible overload is （） fo...
单项选择题For auxiliary engines the permissible overload is （） for one hour every twelve hours.
A.10% B.15% C.20% D.25%
The scavenge air receiver is of a simplified and modula...
单项选择题The scavenge air receiver is of a simplified and modular design with integral non-return flaps, hanging cooler and two auxiliary air blowers（）
A.dozens B.parcels C.bundles D.gallons
The piston crown employs the usual jet-shaker principle...
单项选择题The piston crown employs the usual jet-shaker principle with an arrangement of cooling bores in the crown so that the surface temperatures of the crown are moderate with a very even distribution（）
A.water cooling B.oil cooling C.air cooling D.combined cooling
