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!

Fire detection

Which of the following detector types can detect smoke or a smoldering fire that has not yet burst into flames? A. Ionization B. Rise-of-temperature C. Photoelectric D. Flame detectors

Risk management

How does an owner provide a financial safeguard for the following situations: - unanticipated price escalation of a particular product - an architect’s omission of flashing in the construction documents - a necessary change during construction, modifying the project’s scope. A. Allowance B. Alternates C. Contingency D. Escalation Answer C. Contingency is an amount, usually a percentage, that is part of the project budget to offset changes in the scope of the project, unknown conditions, and gaps/oversights in the documents. ARE 4.0 exam prep: PPP