Skip to main content

Cantilevered beam


The bending moment in a cantilevered beam is negative. Which of the following statements are true?
A. the top fibers are in compression
B. the bottom fibers are in compression
C. rebar placement should be either at the top or the bottom
D. gravity loads are not a factor for negative moment
AnswerB. the bottom fibers are in compression in a cantilevered beam, so top fibers are in tension which requires rebar placement at the top to resist tension.

ARE 4.0 exam prep: SS

Comments

Try These Too!

Clear Floor Area

What is the clear floor area required for this front approach at an accessible water fountain? (yellow dash line) A. 36 x 60 B. 36 x 48 C. 30 x 48 D. 30 x 60 Answer C. 30 x 48. Although set in an alcove, the depth of the recess is not 24 inches or greater, which requires a 36 inch clear width. ARE 4.0 exam prep: SPD

Bolted connections

What is the minimum spacing of bolts specified by AISC? and preferred spacing? A. 1 1/4 times the diameter of the bolt; 2 times preferred B. 1 3/4 times the diameter of the bolt; 2 1/4 times preferred C. 2 1/3 times the diameter of the bolt; 2 2/3 times preferred D. 2 2/3 times the diameter of the bolt; 3 times preferred E. 3 times the diameter of the bolt; 3.25 times preferred

Refrigeration cycle

A water cooled liquid chiller (photo) performs which function in the refrigeration cycle for HVAC systems? A. thermal expansion valve, reducing pressure from the refrigerant's liquid state B. condenser cooling hot refrigerant with ambient air C. heat exchanger for liquid to cool air or equipment D. removes heat from liquid by vapor-compression or absorption refrigeration Answer D. removes heat from liquid by vapor-compression or absorption refrigeration. Industrial chillers may combine the chiller unit, condenser, pump station and expansion valve into a packaged unit. ARE 4.0 exam prep: BS