increasing the linear velocity of the exhaust gases
changing directions of exhaust gas flow
decreasing the temperature of the exhaust gases
accelerating the exhaust gas through a reduced size orifice
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：
Flame screens are used to ______.
A.contain flammable fumes
B.protect firefightiers from flames
C.prevent flames from entering tanks
D.keep flame and sparks from getting out of an engine’s exhaust system
第3题：
A.Close the inlet and outletvalves for diesel oil
B.Open the air nozzles in the secondary combustion chamber until it stops
C.Open the air nozzles in the primary combustion chamber until it stops
D.Close inlet valve for pressurized air
第4题：
What is the difference between thE.remove and thE.purge action with the dpkg command？（）
第5题：
What does the command udld reset accomplish？（）
第6题：
The diesel engine is similar to the gasoline engine in that______.
A.both of them are ignited by compressed air
B.both of them are the forms of external combustion engines
C.both of them have spark plugs
D.the power is developed by the piston in the cylinder
第7题：
Generally speaking, the fuel injected into a marine diesel engine combustion chamber is ignited by ______.
A.spark plugs
B.glow plugs
C.heat of compression
D.a magneto
第8题：
An indication of an overloaded main propulsion diesel engine is( ).
A.white smoke in the exhaust
B.high exhaust gas pyrometer readings
C.sparks in the exhaust
D.blue smoke in the exhaust
第9题：
What does the TRUNCATE statement do?（）
第10题：
Which of the following functions does the "ifconfig en4 down" perform？（）