A.exposure limits
B.concentration limits
C.threshold limit values
D.substance limit values
您可能感興趣的試卷
你可能感興趣的試題
A.they generate heat
B.they emit hydrogen
C.of the toxic fumes they emit
D.they recharge faster in a well ventilated space
A.as it warms up it becomes heavier than air
B.the way it reacts with sea water
C.the strong odor it produces
D.its low temperature causes frostbite or freezing
A.It increases its volume
B.It reduces its volume
C.It has less product per volume
D.None of the above
A.exclusion of all sand and solid matter
B.cleaning with clean fresh or sea water
C.examination for fractures and pitting
D.All of the above
A.that
B.which
C.who
D.these
最新試題
It should be noted（）the use of synthetic mooring ropes able to produce sparks by their manipulation is absolutely forbidden on board petroleum tankers and LPG or LNG carriers，or any vessels carrying inflammable substances.
If you have a liquefied flammable gas barge in tow，which is NOT required of you with respect to the barge and its cargo? （）
Name one major advantage of transporting gas under refrigeration.（）
The storage device for nitrogen-pressurized hydraulic fluid，which is used in closing the blowout preventers is called the（）.
What would you consult to determine the number of persons required on duty while loading a cargo of leaded gasoline on your tanker? （）
The amount of LFG that may be loaded into a given tank is determined by（）.
Each inert gas system must be designed to supply the cargo tanks with a gas，or mixture of gasses，that has an oxygen content by volume of（）.
What is used to test a tank for oxygen content?（）
Where is thicker plating usually found in the construction of integral tanks on a ship? （）
The airborne concentrations of substances (such as H2S) under which nearly all workers may be repeatedly exposed without adverse effects are called（）.