ECIV 419 Final Prep Quiz 1

When designing a steel structure, which aspect is the most effective way to decrease deflections?

• Using a higher grade of steel

• Increasing the Euler buckling capacity

• Improving the geometric properties of a steel member

• Decreasing the length of the member

In steel structural elements, can the capacity change along the length of the member?

• Yes

• No

When using an ultrasonic thickness gauge, what is required to provide a consistent medium through which the signal can travel?

True or false: Increasing the strength of a concrete mix design by a certain percentage will result in an equivalent increase in stiffness.

• True

• False

Name two time-dependent changes in concrete that will increase in severity with a higher cement paste to aggregate ratio.

Is concrete strength affected by the location of the concrete in a structural element?

• Yes

• No

Which part of the concrete member tends to be stronger due to the positioning of the concrete?

• Top

• Bottom

• Middle

• All parts are equally strong

What is a potential effect of the depth of rebar in a reinforced concrete member not being constant?

• It can lead to variable capacity.

• It protects the rebar from corrosion.

• It increases the cost of materials.

• It slows down the construction process.

What part of the tree is circled in green in the diagram?

• Adult wood

• Pith

• Compression wood

• Grain

What allows TPO, EPDM, and PVC roofing membranes to remain watertight even when fastened with screws that penetrate the membrane?

• The use of a special adhesive

• The membrane laps over the fasteners

• The material properties of the membranes

• The screws themselves are made of a waterproof material