(1)+(2)
(1)+(3)
(2)+(3)
(1)+(2)+(3)
第1题：
A dry-type spark arrestor removes sparks from a diesel engine exhaust by ____.
A.increasing the linear velocity of the exhaust gases
B.changing directions of exhaust gas flow
C.decreasing the temperature of the exhaust gases
D.accelerating the exhaust gas through a reduced size orifice
第2题：
natural aspiration
masked intake valves
air cells
scavenging air
第3题：
High firing pressures and low exhaust temperature in a diesel engine may resultfrom( ).
A.decreased piston to cylinder head clearance
B.increased exhaust system back pressure
C.early fuel injection timing
D.low scavenge air temperature
第4题：
the temperature and flow quantity of the exhaust gas from M.E
the quantity of steam demanded
the rotary speed and the cooling water temperature of main engine
efficiency of M.E turbocharger
第5题：
an increase in the exhaust temperature of the affected cylinder
the turbocharger may surge
the explosion pressure in all cylinders will rise violently
smoke from the turbocharger air inlet filter will be seen
第6题：
Fuel has been injected but ignition fails. The possible cause may be ______.
A.slightly leaky exhaust valve
B.increased scavenging air temperature
C.engine cylinders not scavenged sufficiently
D.too much water in the fuel oil
第7题：
not be put into operation too early
be pay adequate attention to
be used only when necessary
be coated with certain material
第8题：
If some of the cylinders are not firing, the ones affected may be determined by watching
A.the exhaust temperature
B.the exhaust pressure
C.the governor
D.the fuel flow meter
第9题：
high exhaust temperature and low firing pressure
high exhaust temperature and high firing pressure
low exhaust temperature and low firing pressure
low exhaust temperature and high firing pressure
第10题：
air charge density becoming too high
piston crown surfaces becoming too cold
formation of excessive quantities of condensate
compression pressure being greatly reduced