CSI Construction Materials & Systems 3

Question 1

What type of glass is produced by heating annealed glass and rapidly cooling it to create surface compression?

Accepted Answer

Tempered glass

Answer

Tempered glass is produced through a thermal tempering process that creates surface compression, making it approximately four times stronger than annealed glass and causing it to dice into small fragments when broken.

Question 2

In masonry construction, what is the purpose of a relieving angle (shelf angle)?

Accepted Answer

To transfer accumulated masonry dead load to the building structure at each floor

Answer

Shelf angles transfer the accumulated dead load of masonry veneer above to the building's structural frame at each floor or intermediate level.

Question 3

Which insulation material has the highest R-value per inch among commonly used rigid insulation products?

Accepted Answer

Polyisocyanurate (polyiso)

Answer

Polyisocyanurate (polyiso) typically achieves R-6 to R-6.5 per inch, the highest among common rigid board insulations, though it can lose R-value at cold temperatures.

Question 4

What does the term 'galvanic corrosion' describe in the context of construction materials?

Accepted Answer

Electrochemical corrosion when dissimilar metals contact each other in the presence of an electrolyte

Answer

Galvanic corrosion occurs when two dissimilar metals are in electrical contact with an electrolyte (such as water), causing the less noble metal to corrode preferentially.

Question 5

In wood-frame construction, what is the structural purpose of a rim joist (band joist)?

Accepted Answer

To provide lateral bracing for interior floor joists against overturning

Answer

Rim joists run perpendicular to floor joists at the perimeter and resist overturning (rotation) of the parallel floor joists while also capping the floor system.

(CSI) Construction Specifications Institute Certification Practice Test

(CSI) Construction Specifications Institute Certification Practice Test

CSI Construction Materials & Systems 3