Skip to main content

Duct selection

Place the ducts in this image in order of efficiency, from most to least efficient:
I. Square
II. Round
III. Rectangular, long horizontal
IV. Rectangular, long vertical

A. III, IV, I, II
B. I, IV, III, II
C. II, III, IV, I
D. II, I, IV, III

AnswerD. The most efficient shape is one using the least perimeter length in relation to cross-sectional area and minimized friction loss to move a volume of air.

ARE 4.0 exam prep: BS

Comments

Try These Too!

Structural forces

Choose a term that best identifies the type of force shown in this diagram - A. collinear B. concurrent C. nonconcurrent D. noncoplanar

Roof pitch

Which one of the following slopes in this illustration corresponds with an 8:12 pitch roof? A. 45° B. 36.87° C. 33.69° D. 26.57°

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