F-Gas English Low GWP
All questions
HFC | Flammable | CO₂ | NH₃
Easy questions |
Medium questions |
Difficult questions
1
Medium
Why is ammonia (R717) classed as a toxic refrigerant?
| Because it is colourless and odourless and therefore hard to detect |
| It severely irritates the respiratory tract, eyes and skin, and is poisonous when inhaled at higher concentrations |
| Because it does not react with water, making neutralisation difficult |
| Because it is heavier than air and displaces oxygen |
2
Medium
Which property of ammonia helps people detect a leak early?
| It is denser than air |
| It is odourless |
| A very low odour threshold (a few ppm) |
| It is yellow in air |