Skip to main content

Temperature Inversion

How does the natural weather phenomenon of temperature inversion (sometimes called cold inversion) work in relation to air pollution?

AnswerCooler, heavier air at ground level becomes trapped along with the pollutants discharged into it by warmer air at higher elevations, until another current displaces the layer and clears the inversion.

ARE 4.0 exam prep: PPP

Comments

Try These Too!

Calculate Luminance

A typical 60-watt standard frosted incandescent bulb outputs 890 lumens for an efficacy ratio of about 15 lumens per watt. As an A19, its shape is spherical. What is the its calculated luminance? A. 25,115 cd/in² B. 25.115 cd/ft² C. 25,115 cd/m² D. Indeterminate, missing variable. Answer If 1 candela (cd) = 4 ∏ lumens (lm), 890 x 1cd/4∏ = 71 cd, A19 = 19/8 = 2.375 in or 60mm diameter (= 30mm radius), L = intensity / projected area, 71 cd / ∏ r² = 71/ 3.14 x (.03m)² = 25,115 cd/m² ARE 4.0 exam prep: BS

Characteristics of form

Which example illustrates a regular ordering of elements producing RHYTHM? A B C D Answer Answer is C. A = proportion, B = symmetry, D = balance ARE 4.0 exam prep: PPP

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°