Question

1. which of the following is a concern when handling or transporting dangerous goods in class 2.2, non - flammable, non - toxic gases?

they may transmit diseases that affect humans
they may ignite when in contact with water
they may cause suffocation by displacing oxygen

Explanation:

• Non - flammable, non - toxic gases in Class 2.2 do not transmit diseases (so the first option is wrong).
• They are non - flammable, so they do not ignite when in contact with water (second option is wrong).
• These gases can displace oxygen in the air. When there is less oxygen available (due to the displacement by these non - flammable, non - toxic gases), it can lead to suffocation.

Answer:

They may cause suffocation by displacing oxygen.