Practice questions mixed chapters pt II

1. Which are the most common curing methods for a field applied natural rubber lining project?

• 1. Autoclave / gas fired

• 1. Chemical cure

• 1. Co-reaction

• 1. Atmospheric steam or internal steam

1. Which component crosslinks with the natural rubber giving a physicochemical change that makes the rubber harder?

Typically polymeric sheet materials are ?

( Select all that apply )

• Thermosetting

• Thermoplastic

• Heat welded together at seams

• Primed with a suitable adhesive

The formal process in which a standard is changed or updated is ?

You will inspect a project in 6 months’ time where the requirements of a consensus standard is being interpreted differently by the various parties. What would be the best course of action to resolve the matter?

• 1. Call a NACE instructor

• 1. Restate your interpretation and stick to it

• 1. Request an answer from the coating manufacturer

• 1. Request interpretation from the originating organization

The standards produced by NACE International are considered to be ?

• 1. Mandatory standards

• 1. National standards

• 1. De Facto standards

• 1. Consensus standards

1. Cement mortar coatings have prevented reinforcing steel from corroding when subjected to which solution?

• 0. Acid

• 0. Surfactants

• 1. Potable water

• 1. Distilled water

1. Concrete cures by which process?

1. Many grades of steel are passivated by concrete when the pH of the concrete reaches ?

• 1. 6 – 11.5

• 1. < 6 ( less than 6 )

• 1. 7 or neutral

• 1. > 11.5 ( greater than 11.5 )

The term Gunite does not refers to :

• 1. Shotcrete application

• 1. Water blasting

• 1. Abrasive blasting

• 1. Broom finish