ENGR 405: Exam I questions with verified
answers
1930s-1950s Ans✓✓✓peak in smoke so control devices and cleaner
fuel
1940s-1950s Ans✓✓✓pioneering work of Haagen-Smit (father of air
pollution control, photochemical)
1977, 1990 CAAA Ans✓✓✓requirements for review, rate non-
attainment severity, mobile source reductions, hazardous air pollutant
regulations, permitting requirements
act passed in 1955 Ans✓✓✓Air Pollution Control Act, federal research
based, temporary, focus on state level
act passed in 1963 Ans✓✓✓clean air act, requested by president,
established by federal jurisdiction
act passed in 1965 Ans✓✓✓Motor Vehicle Air Pollution Control Act,
first federal regulation of vehicular emissions
act passed in 1967 Ans✓✓✓Air Quality Act, extended the role of the
federal government, recognized that research does not replace regulation
, act passed in 1970 Ans✓✓✓Clean Air Act Amendments (CAAA),
establishment of EPA, establishment of NAAQS, requirement of State
Implementation Plans (SIPs) and New Source Performance Standards
(NSPS)
advantages of cyclones Ans✓✓✓cheap, can operate at high temps, no
moving part, can work with liquid or dry, relatively small
advantages of ESPs Ans✓✓✓high efficiency, high flow rate with low
pressure drop, ability to recycle collected material, work at range of T,
low operating costs, durability
advantages of filters Ans✓✓✓highly efficient, variety of PM, modular,
low pressure drop
advantages of scrubbers Ans✓✓✓amenable flammable/explosive, gets
both gas and particles, cooling of hot gases, efficiency can be controlled
air pollution Ans✓✓✓one or more substances in the outdoor
atmosphere at quantities which are or may be harmful or injurious to
human health or welfare, animal or plant life, or property, or
unreasonably interfere with the enjoyment of life or property
cause of NOx Ans✓✓✓combustion in air
answers
1930s-1950s Ans✓✓✓peak in smoke so control devices and cleaner
fuel
1940s-1950s Ans✓✓✓pioneering work of Haagen-Smit (father of air
pollution control, photochemical)
1977, 1990 CAAA Ans✓✓✓requirements for review, rate non-
attainment severity, mobile source reductions, hazardous air pollutant
regulations, permitting requirements
act passed in 1955 Ans✓✓✓Air Pollution Control Act, federal research
based, temporary, focus on state level
act passed in 1963 Ans✓✓✓clean air act, requested by president,
established by federal jurisdiction
act passed in 1965 Ans✓✓✓Motor Vehicle Air Pollution Control Act,
first federal regulation of vehicular emissions
act passed in 1967 Ans✓✓✓Air Quality Act, extended the role of the
federal government, recognized that research does not replace regulation
, act passed in 1970 Ans✓✓✓Clean Air Act Amendments (CAAA),
establishment of EPA, establishment of NAAQS, requirement of State
Implementation Plans (SIPs) and New Source Performance Standards
(NSPS)
advantages of cyclones Ans✓✓✓cheap, can operate at high temps, no
moving part, can work with liquid or dry, relatively small
advantages of ESPs Ans✓✓✓high efficiency, high flow rate with low
pressure drop, ability to recycle collected material, work at range of T,
low operating costs, durability
advantages of filters Ans✓✓✓highly efficient, variety of PM, modular,
low pressure drop
advantages of scrubbers Ans✓✓✓amenable flammable/explosive, gets
both gas and particles, cooling of hot gases, efficiency can be controlled
air pollution Ans✓✓✓one or more substances in the outdoor
atmosphere at quantities which are or may be harmful or injurious to
human health or welfare, animal or plant life, or property, or
unreasonably interfere with the enjoyment of life or property
cause of NOx Ans✓✓✓combustion in air
