CHP5

Surface cleanliness has little effect on an applied coating?

• True

• True for epoxy coatings only

• True for zinc primers only

• Not true, surface cleanliness has a major effect on applied coatings including poor adhesion

After blast cleaning, dust can settle within the steel profile prior to coating?

• Not true

• Only surfaces with a large profile

• Only surfaces with a small profile

• True

A small level of surface dust is acceptable for all coatings?

• Only on vertical surfaces

• Only with certain dusts

• Not true

• Only on horizontal surfaces

Are dust removal systems used during blast cleaning?

• No dust removal systems are not used in the coatings industry

• Yes dust removal systems are widely available

• Yes but only for non metallic dusts

• Yes but only for metallic dusts

Are grit recovery systems available for removing spent abrasives?

• Yes, grit recovery units are widely used

• Yes but only available for metallic abrasives

• Yes but only for non metallic abrasives

• Not true grit recovery systems are not used

Can grit and dust removal systems remove the majority of dusts during blast cleaning?

• True, however the correct type of equipment must be used

• No this task is not possible

• True for confined space workings only

• True for dusts only, not grit

A light blow down with clean air is sometimes conducted prior to coating application?

• True, however the air must be hot

• Only on vertical surfaces

• Only on horizontal surfaces

• True, however vacuum cleaning is more effective (also check the specification)

Vacuum cleaning is conducted on numerous locations such a tank lining preparation?

• Not true

• Only diesel tanks

• Only petrol tanks

• True

Dry vacuum cleaning will remove soluble salts?

• True, if the salts are white

• True, if the salts are large

• Not true

• True

The most effective method of removing soluble salts is?

• Blowing down

• Vacuum cleaning

• Fresh water washing

• Disk/Grinding