When checking the oxygen content of the cargo tanks prior to loading cargoes requiring vapor recovery，the atmosphere must be sampled（）.
1、When measuring the oxygen content of t
When measuring the oxygen content of the cargo tanks prior to loading cargoes requiring vapor recovery，check it（）.Aone meter from the tank bo...
2、If the meter needle of the oxygen indi
If the meter needle of the oxygen indicator cannot be set to zero，what should be done? （）AReplace the batteriesBCheck the sampling tube for...
3、When joining the female coupling of th
When joining the female coupling of the fire hose to the male outlet of the hydrant，you should make sure that the（）.Athreads are lubricatedBnozzle is attached to the hoseCfemale coupling has a gasketDhose is led out
4、When did you check the contents of C02
When did you check the contents of C02 cylinders（）.Aby countingBby calculatingCby weighingDby filling
5、If the moisture content of the cargo s
If the moisture content of the cargo sample is（）the Transportable Moisture Limit,then the cargo should be safe to load.AaboveBbelowCequal toDuncertai
6、The max effluent of the oil content fr
The max effluent of the oil content from a ship of 400 tons gross tonnage and above other than an oil tanker is（）.Aless than 100 parts per millionBmore than 100 parts per millionCat least 100 parts per millionD100 parts per millio