REHS 2026 ALL QUESTIONS AND ANSWERS
RATED A+
✔✔100. "Swimmers itch" is also known as
a. gastroenteritis
b. trichinosis
c. schistosomiasis
d. leptospirosis - ✔✔schistosomiasis
✔✔101. Rodents are the primary reservoir/host of the hantavirus. In particular, _______
appears to be the primary
Reservoir for the newly recognized (1993) hantavirus in the southeastern US.
a. rat
b. rabbit
c. house mouse
d. deer mouse - ✔✔deer mouse
✔✔102. Bacteria may be carried in the digestive system of the housefly for as long as
a. 1 week
b. 3 months
c. 4 weeks
d. 2 days - ✔✔4 weeks
✔✔103. Pediculosis is an infestation of
a. chiggers
b. mites
c. lice
d. roaches - ✔✔lice
✔✔104. ___________is an infectious disease of the skin caused by burrowing of the
female mite into the skin where
it deposits its eggs.
a. tularemia
,b. scabies
c. psittacosis
d. pediculosis - ✔✔scabies
✔✔105. Rattus Rattus is also referred to as the
a. house rat
b. norway rat
c. roof rat
d. all of the above - ✔✔roof rat
✔✔106. Psittacosis/Ornithosis is spread by
a. bats
b. shellfish
c. rodents
d. pigeons - ✔✔pigeons
✔✔107. In general, there are three kinds of weeds. These are
a. srads, clowds, and mullahs
b. bronzes, slorles, and direals
c. annuals, biennials, and perennials
d. milkweeds, bindweeds, and perennials - ✔✔annuals, biennials, and perennials
✔✔108. A pollen count index of less than _____ pollen grains/m3 of air in a 24 hour
period is considered
practically free of ragweed contamination.
a. 1
b. 5
c. 20
d. 40 - ✔✔5
✔✔109. A minimum of _____ of sleeping area per person is required in the APHA
appraisal method.
a. 10ft2
b. 20ft2
c. 40 ft2
d. 60 ft2 - ✔✔40 ft2
✔✔110. The ASHRAE recommended minimal thermal standard for dwellings is
___________ F at 40%
humidity and an air circulation rate of 45 fpm.
a. 57oF
b. 60oF
c. 68oF
d. 76oF - ✔✔76 F
, ✔✔111. The drain line of an ice machine should connect to the sewer system through
a. a grease trap
b. a direct connection below floor level
c. an open receptacle with an air gap
d. a backflow preventer properly vented - ✔✔an open receptacle with an air gap
✔✔112. Nosocomial infections are a recurring problem in
a. food establishments
b. hospitals
c. swimming pools
d. health spas - ✔✔hospitals
✔✔113. Minimum wash water temperature in a hospital laundry is
a. 146 to 150oF
b. 160 to 167oF
c. 170 to 178oF
d. 185 to 196oF - ✔✔160 to 167 F
✔✔114. Lead levels exceeded 10ug/dL in ____ U.S. children aged 6 and under in 1990
a. 300,000
b. 3,000
c. 1,000,000
d. 3,000,000 - ✔✔3,000,000
✔✔115. Most urban dwellers spend what percent of their total time indoors
a. 10 to 20%
b. 25 to 50%
c. 80 to 90%
d. 70 to 80% - ✔✔80 to 90%
✔✔116. Which of the following is the primary cause of indoor air quality problems>
a. inadequate ventilation
b. contaminated outside air
c. radon
d. ragweed - ✔✔inadequate ventilation
✔✔117. Radon is detected in a home through the use of instrumentation that measures
a. geiger rays
b. beta particles
c. alpha particles
d. UV rays - ✔✔alpha particles
RATED A+
✔✔100. "Swimmers itch" is also known as
a. gastroenteritis
b. trichinosis
c. schistosomiasis
d. leptospirosis - ✔✔schistosomiasis
✔✔101. Rodents are the primary reservoir/host of the hantavirus. In particular, _______
appears to be the primary
Reservoir for the newly recognized (1993) hantavirus in the southeastern US.
a. rat
b. rabbit
c. house mouse
d. deer mouse - ✔✔deer mouse
✔✔102. Bacteria may be carried in the digestive system of the housefly for as long as
a. 1 week
b. 3 months
c. 4 weeks
d. 2 days - ✔✔4 weeks
✔✔103. Pediculosis is an infestation of
a. chiggers
b. mites
c. lice
d. roaches - ✔✔lice
✔✔104. ___________is an infectious disease of the skin caused by burrowing of the
female mite into the skin where
it deposits its eggs.
a. tularemia
,b. scabies
c. psittacosis
d. pediculosis - ✔✔scabies
✔✔105. Rattus Rattus is also referred to as the
a. house rat
b. norway rat
c. roof rat
d. all of the above - ✔✔roof rat
✔✔106. Psittacosis/Ornithosis is spread by
a. bats
b. shellfish
c. rodents
d. pigeons - ✔✔pigeons
✔✔107. In general, there are three kinds of weeds. These are
a. srads, clowds, and mullahs
b. bronzes, slorles, and direals
c. annuals, biennials, and perennials
d. milkweeds, bindweeds, and perennials - ✔✔annuals, biennials, and perennials
✔✔108. A pollen count index of less than _____ pollen grains/m3 of air in a 24 hour
period is considered
practically free of ragweed contamination.
a. 1
b. 5
c. 20
d. 40 - ✔✔5
✔✔109. A minimum of _____ of sleeping area per person is required in the APHA
appraisal method.
a. 10ft2
b. 20ft2
c. 40 ft2
d. 60 ft2 - ✔✔40 ft2
✔✔110. The ASHRAE recommended minimal thermal standard for dwellings is
___________ F at 40%
humidity and an air circulation rate of 45 fpm.
a. 57oF
b. 60oF
c. 68oF
d. 76oF - ✔✔76 F
, ✔✔111. The drain line of an ice machine should connect to the sewer system through
a. a grease trap
b. a direct connection below floor level
c. an open receptacle with an air gap
d. a backflow preventer properly vented - ✔✔an open receptacle with an air gap
✔✔112. Nosocomial infections are a recurring problem in
a. food establishments
b. hospitals
c. swimming pools
d. health spas - ✔✔hospitals
✔✔113. Minimum wash water temperature in a hospital laundry is
a. 146 to 150oF
b. 160 to 167oF
c. 170 to 178oF
d. 185 to 196oF - ✔✔160 to 167 F
✔✔114. Lead levels exceeded 10ug/dL in ____ U.S. children aged 6 and under in 1990
a. 300,000
b. 3,000
c. 1,000,000
d. 3,000,000 - ✔✔3,000,000
✔✔115. Most urban dwellers spend what percent of their total time indoors
a. 10 to 20%
b. 25 to 50%
c. 80 to 90%
d. 70 to 80% - ✔✔80 to 90%
✔✔116. Which of the following is the primary cause of indoor air quality problems>
a. inadequate ventilation
b. contaminated outside air
c. radon
d. ragweed - ✔✔inadequate ventilation
✔✔117. Radon is detected in a home through the use of instrumentation that measures
a. geiger rays
b. beta particles
c. alpha particles
d. UV rays - ✔✔alpha particles
