Construction Materials Test

Which of the 3 choices below is an active ingredient used in making the other 2 choices?

• cement

• Concrete

• mortar

Concrete has 4 main ingredients when mixing it. Changing the amount of which of those 4 materials in the mixture has the greatest effect on the stregth of concrete?

• Water

• Cement

• Sand

• Stone (Aggregate)

When a force (or weight) is applied to the top of a slab of concrete, the top and bottom experience different types of stresses. What type of stress wears on the Top of Slab?

• Tension

• Compression

When a force (or weight) is applied to the top of a slab of concrete, the top and bottom experience different types of stresses. What type of stress wears on the Bottom of Slab?

• Tension

• Compression

What is the name for the most commonly used type of reinforcement in concrete?

• Rebar

• Stone (aggregate)

• copper

• Threaded Rod

What causes each grain line you see on a piece of lumber?

• Saw blade marks from the cutting process

• Each line is a channel bugs used to move within the tree

• The trees growth rings

• spots of high moisture content in the wood

Where is a piece of wood the weakest and most liekly to fail?

• in the center

• Anywhere there is a knot

• closest to the edge

• Along the grain lines

Which type of wood is promarly used when framing houses

• hardwood

• softwood

• sapwood

• heartwood

Lumber is called "green" when... (NOTE: This is different than being green treated)

• it is stained by fungi

• the tree is still standing

• it is first cut from the log

• it has dried and is ready for paint

Which of the following happens when wood dries

• it changes color

• it shrinks

• it gets heavier

• it gives off an odor