Question 4
- Name the type of sealant best used for all tubing insulation seams.
- List three types of electric motor used in airconditioning and refrigeration system.
- List five hand tools used during installation of split airconditioner.
- State three functions of insulation in a cold room.
Observation
These questions tested the workshop experience of the candidates during installation of airconditioning and refrigeration systems. Majority the candidates attempted these questions and performed very well. However, some candidates’ responses revealed that many do not know the type of sealant best used for all tubing insulation seams.
The expected responses are:
(a) The type of sealant best used for all tubing insulation seams
- Silicone
- Polyurethane
- Acrylic
- Urethane
- Butyl
- Polymer