AC/Refrigerator Paper 2 WASSCE (SC), 2017

Question 1

 

 

The question required students to demonstrate their knowledge of safety. Majority of the candidates were able to do so for a score of 15/15. i.e.:

 

State three safety requirements for storage of refrigerant.

 

Observation

           

 

The expected answer is:
Refrigerants should be supplied in large pressure vessels; it must be stored in cold and well ventilated space; it should be stored far away from boiler rooms; brazing torches or welding sets must not be rolled on its sides cause valves can be damaged; refrigerant cylinder must be tagged for easy identification.