Which instrument is suitable for determining the presence of explosive concentrations of fuel oil vapors in tanks ________．
A.A flame safety lamp
B.A combustible gas indicator
C.A liquid cargo meter
D.All of the above
第1题：
听力原文：M: If an instrument is payable to the order of both A and B who are not partners, what should they do?
W: Both of them must endorse, unless one has authority to endorse for the other.
Q: Which of the following is not right according to the woman?
(18)
A．Both endorse the instrument.
B．Neither of them endorses the instrument.
C．A authorizes B to endorse the instrument.
D．B authorizes A to endorse the instrument.
第2题：
An inert gas system on a tanker should be used to ______.
A.prevent the generation of flammable or combustible gas in tanks
B.blow out cargo lines to prevent the build up of gas concentrations
C.dilute tank atmospheres to keep gas concentrations below the lower explosive limit
D.prevent fires in the pumproom by continually displacing flammable vapors
第3题：
The critical path is calculated by
A.subtracting the end date of task one from the start date of task two.
B.determining which tasks have the least amount of total slack.
C.totaling the time for all activities.
D.determining the shortest path through the network.
E.Determining which tasks have the most slack
第4题：
Combustible gas indicators measure the presence of combustible gas as a percentage of the____.
A.flash point
B.upper explosive limit
C.lower explosive limit
D.fire point
第5题：
Which statement is TRUE concerning the flash point of a substance ________．
A.It is lower than the ignition temperature
B.It is the temperature at which a substance will spontaneously ignite
C.It is the temperature at which a substance，when ignited，will continue to burn
D.It is the temperature at which the released vapors will fall within the explosive range
第6题：
A.flash point
B.fire point
C.upper explosive limit
D.lower explosive hmlt
第7题：
A bill of lading could be which of the following？ ______. ① A contract ② A receipt ③ A negotiable instrument．
A.I and ③ only
B.② and ③ only
C.② and ③ only
D.①，② and ③
第8题：
● The critical path is calculated by
A subtracting the end date of task one from the start date of task two.
B determining which tasks have the least amount of total slack.
C totaling the time for all activities.
D determining the shortest path through the network.
E Determining which tasks have the most slack
第9题：
Atmospheres laden with coal dust or grain dust caused by loading these cargoes ______．
A.require loading operations to be shut down until the atmosphere clears
B.are toxic to human life
C.are subject to spontaneous combustion
D.may be explosive in some concentrations
第10题：
In determining a safe speed, the Rules list all of the following as factors which must be taken into account EXPECT the ______.
A.limitations of radar equipment
B.presence of background lights at night
C.maximum horsepower of your vessel
D.maneuverability of your vessel