12.
If wind and thermal convection are natural general ventilation, how do they work?
a. Their effects result from natural pressure and air density differences.
b. Each causes natural displacement and infiltration of air through windows,
doors, walls, and other openings.
c.
Warmer air inside a building rises, leaks out of openings in the upper areas
as colder air leaks into the building from lower areas, warms up and rises.
d. All of the above.
13.
ventilation on a hot and sticky day outside?
a. Constant and smooth.
b. Erratic and unreliable.
c.
Pleasant and clear.
d. Natural and cold.
14.
If only mechanical general ventilation is used in an industrial operation building,
what must be relied upon completely?
a. The air supply must reach interior areas to provide adequate air distribution
and prevent the creation of negative air pressures in the building.
b. Continuous fresh supply of oxygenated air.
c.
Removal of stagnant and contaminant air.
d. All of the above.
MD0165
4-28