单项选择题
A.increase the fuel oil temperature B.decrease the fuel oil temperature C.decrease the fuel oil supply pressure D.increase the air supply
With regards to a diesel engine crankcase explosion, th...
With regards to a diesel engine crankcase explosion, the most violent is the（） (1) primary explosion (2) secondary explosion
A.(1) only B.(2) only C.both (1) and (2) D.neither (1) or (2)
Waterside scale in a fire-tube boiler may cause （）.A.in...
单项选择题Waterside scale in a fire-tube boiler may cause （）.
A.increased heat transfer B.fireside erosion C.high steam demand D.overheated tubes
The maximum pressure developed by a waste heat boiler i...
单项选择题The maximum pressure developed by a waste heat boiler is determined by the main engine exhaust （）.
A.gas composition B.gas temperature C.pressure D.timing
