RS/REHS PRACTICE QUESTIONS 2026: MOST TESTED TOPICS
WITH CORRECT ANSWERS & TESTED QUESTIONS
When two pollutants are combined, the effects are greater
than the sum of the individual effects. This is called:
A) commensalisms
B) synergism
C) magnification
D) multiplication
B) synergism
Air is vital to existence. In fact, in a day's time humans breathe
an average of:
A) 3 to 4 pounds of air
B) 35 pounds of air
C) 37 pounds of air
D) 1600 cubic ft of air
B) 35 pounds of air
Which component of clean, dry air has the smallest volume?
A) carbon monoxide
B) nitrogen dioxide
C) ammonia
D) sulfur dioxide
,D) sulfur dioxide
Ozone reduces the useful life of all the following except:
A) rubber
B) textiles
C) dyes
D) nylons
D) nylons
Major effects on humans are caused by los angeles-type
smog, comprised of what two main pollutants?
A) sulfur dioxide and hydrogen fluoride
B) sulfur dioxide and carbon monoxide
C) hydrogen sulfide and peroxacyl nitrates
D) ozone and nitrogen dioxide
A) sulfur dioxide and hydrogen fluoride
Photochemical smog has been reported in congested areas
with
A) large industries
B) chemical processing plants
C) industries processing hazardous wastes
D) high motor vehicle traffic
,D) high motor vehicle traffic
What type of air pollution causes bleaching of leaves in plants?
A) pan
B) sulfur dioxide
C) industries processing hazardous wastes
D) high motor vehicle traffic
B) sulfur dioxide
Which of the following are not major sources of sulfur dioxide
pollution?
A) metal smelters
B) coal and oil burning plants
C) refineries
D) electrical substations
D) electrical substations
Which of the following is not a malodorous gas?
A) sulfur dioxide
B) hydrogen sulfide
C) carbon monoxide
D) phenol
C) carbon monoxide
, What size particle can reach the lowest parts of the lung?
A) 15 microns
B) 50 microns
C) 3 microns
D) any size particles
C) 3 microns
The three tiny bones contained in the middle ear are?
A) incus, malleus, and stapes
B) ulna, radius, stapes
C) femur, phalanges, and metatarsal
D) incus, radius, and xyloid
A) incus, malleus, and stapes
_____ is defined as noise induced hearing loss attributed to
environmental noise?
A) presbycusis
B) tinnitus
C) cochlea
D) socioacusis
D) socioacusis
WITH CORRECT ANSWERS & TESTED QUESTIONS
When two pollutants are combined, the effects are greater
than the sum of the individual effects. This is called:
A) commensalisms
B) synergism
C) magnification
D) multiplication
B) synergism
Air is vital to existence. In fact, in a day's time humans breathe
an average of:
A) 3 to 4 pounds of air
B) 35 pounds of air
C) 37 pounds of air
D) 1600 cubic ft of air
B) 35 pounds of air
Which component of clean, dry air has the smallest volume?
A) carbon monoxide
B) nitrogen dioxide
C) ammonia
D) sulfur dioxide
,D) sulfur dioxide
Ozone reduces the useful life of all the following except:
A) rubber
B) textiles
C) dyes
D) nylons
D) nylons
Major effects on humans are caused by los angeles-type
smog, comprised of what two main pollutants?
A) sulfur dioxide and hydrogen fluoride
B) sulfur dioxide and carbon monoxide
C) hydrogen sulfide and peroxacyl nitrates
D) ozone and nitrogen dioxide
A) sulfur dioxide and hydrogen fluoride
Photochemical smog has been reported in congested areas
with
A) large industries
B) chemical processing plants
C) industries processing hazardous wastes
D) high motor vehicle traffic
,D) high motor vehicle traffic
What type of air pollution causes bleaching of leaves in plants?
A) pan
B) sulfur dioxide
C) industries processing hazardous wastes
D) high motor vehicle traffic
B) sulfur dioxide
Which of the following are not major sources of sulfur dioxide
pollution?
A) metal smelters
B) coal and oil burning plants
C) refineries
D) electrical substations
D) electrical substations
Which of the following is not a malodorous gas?
A) sulfur dioxide
B) hydrogen sulfide
C) carbon monoxide
D) phenol
C) carbon monoxide
, What size particle can reach the lowest parts of the lung?
A) 15 microns
B) 50 microns
C) 3 microns
D) any size particles
C) 3 microns
The three tiny bones contained in the middle ear are?
A) incus, malleus, and stapes
B) ulna, radius, stapes
C) femur, phalanges, and metatarsal
D) incus, radius, and xyloid
A) incus, malleus, and stapes
_____ is defined as noise induced hearing loss attributed to
environmental noise?
A) presbycusis
B) tinnitus
C) cochlea
D) socioacusis
D) socioacusis
