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