CHP16-2

The SSPC / NACE joint standard for concrete preparation is SP............ / NACE...............?

• 13 and 6

• 31 and 6

• 13 and 3

• 31 and 6

Methods of contamination removal on concrete include detergent and pressure washing also ............... cleaning and .............. cleaning?

• Steam and chemical

• Heat and chemical

• Steam and heat

• Dust and chemical

Burrs, fins, and projections are all types of?

• Concrete

• Cement

• Holes

• Protrusions

Laitance is a weak substance of a water-rich mixture and should be removed if the concrete is to be coated?

• Not true

• True on old concrete only

• True

• True on vertical surfaces only

The level of porosity in concrete can vary from one substrate to another?

• True

• True for old concrete only

• True for vertical surfaces only

• Not true

Can ice or ice crystals be detrimental to concrete?

• No

• Only in winter

• Yes, this may cause cracking

• Only with large ice crystals