A fully refrigerated gas carrier is designed for excess pressure in the cargo tank below ___.
Your answer is correct:
0,7 bar.
2
Can a mix of propane and air be ignited if the percent of propane are 20 % by volume?
Your answer is correct:
No.
3
In sour crude oil you will find Hydrogen sulphide (H2S), is H2S a poisonous gas?
Your answer is correct:
Yes already at a concentration of 300 ppm it is deadly.
4
Is an “Independent tank” a part of the hull structure?
Your answer is correct:
No.
5
Oil tankers of 70 000 dwt and above must have how many slop tanks?
Your answer is correct:
2.
6
What do we mean by “Load on top”?
Your answer is correct:
New cargo loaded on top of old residues.
7
What is IMO’s definition of condensed gases?
Your answer is correct:
It is liquids with vapour pressure above 2,8 bar at 37,8 °C.
8
What is the lowest percent of oxygen that have to be present before fire and explosion can take place even though both hydrocarbon gas and ignition sources are present?
Your answer is correct:
10,8 % by volume.
9
What is the maximum allowed oxygen content in a cargo tank?
Your answer is correct:
8 %.
10
What must be the minimum oxygen content measured in a cargo tank before a person can enter the tank?
Your answer is correct:
21 %.
11
Where do you find design standards for new ships (oil tankers)?