1. [单选题]In an operating diesel engine, which of the following conditions is an indication of a leaking air starting valve?
A. Noise coming from that air starting valve
B. Continuous operation of the starting air compressor
C. Zero air pressure in the air starting system
D. Overheated starting air pipe to the cylinder head
2. [单选题]应备有一份“垃圾管理计划”的船舶上载运人数至少是_______。
A. 10人
B. 15人
C. 25人
D. 30人
3. [单选题]零件的互换性是指在一批规格相同的零件中，( )选择取出一个，( )修配，装配后就能达到设计和使用要求。
A. 经过/无须
B. 经过/需要
C. 不经过/无须
D. 不经过/需要
