should be worn while fighting a fire
can be used in atmospheres deficient in oxygen
filter contaminants from air that is to be breathed
may be substituted for a self-contained breathing apparatus
第1题：
A.Configure the gateway on Host A as 10.1.1.1
B.Configure the gateway on Host B as 10.1.2.254
C.Configure the IP address of Host A as 10.1.2.2
D.Configure the IP address of Host B as 10.1.2.2
E.Configure the masks on both hosts to be 255.255.255.224
F.Configure the masks on both hosts to be 255.255.255.240
第2题：
The primary hazard of liquefied petroleum gas and liquefied natural gas is ______．
A.Pressure
B.Toxicity
C.Temperature
D.Flammability
第3题：
Who had gas masks?
A． Everybody.
B． A part of the protestors.
C． The policemen.
D． Both B and C．
第4题：
Which statement about inert gas pressures in a cargo tank is TRUE ________．
A.The pressures of the inert gas in the tank may create excessive pressure at the pump while discharging
B.Gas pressures should be maintained at the highest permissible level throughout the discharging process
C.High gas pressures may cause pyrophoric oxidation in the tank
D.High gas pressures may cause loss of suction when stripping
第5题：
Inerting means ______．
A.The introduction of inert gas into a tank with the object of reducing the oxygen content to below 8% by volume
B.The introduction of inert gas into a gas free tank for the purpose of reducing the oxygen content to below 8% by volume
C.The introduction of inert gas into a cargo tank during cargo discharge to replace the volume of discharged cargo
D.All of the above
第6题：
Which method is used to supply inert gas from a flue gas system to the cargo tanks?
A.Exhaust gas pressure from the stack
B.High capacity fan
C.Inert gas compressor
D.Natural aspiration
第7题：
Which of the listed functions is the purpose of a gas scrubber in an inert gas generation system ________．
A.Cools the inert gas
B.Maintains the oxygen content at 5% by volume
C.Drains off static electricity in the inert gas
D.Maintains the water seal on the gas main
第8题：
It is said that the gas company will raise the gas fare _____ 4%.
A、by
B、for
C、 from
D、 to
第9题：
When a non-volatile cargo is carried in a tank that has not been previously gas freed，then that tank shall ______．
A.be purged with hydrocarbon gas prior to loading
B.be gas-freed after loading operations
C.not be maintained in an inert condition
D.be maintained in an inert condition
第10题：
Gas masks ______.
A.should be worn while fighting a fire
B.can be used in atmospheres deficient in oxygen
C.filter contaminants from air that is to be breathed
D.may be substituted for a self-contained breathing apparatus