- | P a g e
REHS QUESTIONS AND VERIFIED ANSWERS|
100% CORRECT |GRADE A (LATEST UPDATE)
What would you expect from a swimming pool with a high pH
reading? Correct answer: Cloudiness and eye irritation
Which will raise the pH of a pool? Correct answer: Soda Ash or
Caustic Soda
Soda ash is Correct answer: Sodium Carbonate NaCO3
Caustic Soda is Correct answer: NaOH
Which chemical is used to oxygenate swimming pool water?
Correct answer: Sodium Carbonate
How would a swimmer most likely contract Legionella
pneumonophila from a pool? Correct answer: inhalation of pool
water
Swimming pool water clarity is measured in NTUs, it is recommended that a level of 0.5 NTU: Correct answer: Shall not be exceeded
- | P a g e
Microbe entirely responsible for skin infections in a whirlpool is: Correct answer: Pseudomonas Aeruginosa
The formula: Volume of pool (gal) / pump flow rate (gpm) x 60
(min/hr) = turnover rate will tell the: Correct answer: Number of hours it will take for the entire contents of pool to pass through the filters
A pool filtration system should filter the entire volume of water every: Correct answer: 6-8 hours
The water depth should be clearly marked on the pool perimeter for every ___ of depth change: Correct answer: 2 foot
It has been found that pools less than 30 feet wide and with a surface area of less than 1600 sq feet: Correct answer: may utilize skimmers instead of gutters
The pool must be designed to: Correct answer: fit the expected numbers of swimmers
The fresh water supply line to the pool must: Correct answer: fill to the pool through an approved air gap
- | P a g e
In large pools with outlets more than 5 feet from the end wall, pool inlets should be located every: Correct answer: 20 feet
Pool inlets should be located a minimum of 10 inches to 15 inches below the water line to: Correct answer: prevent loss of disinfectant
When chlorine is added to water: Correct answer: one acid is formed
The connection between the pool drain and the sanitary sewer must: Correct answer: be provided with an air gap no less than 2 pipe diameters of the discharge pipe
If an REHS receives a complaint about an abandoned swimming pool that is green colored and has mice, what should he or she
do first? Correct answer: verify with an inspection
Lighting, circuits and nearby receptacles should be protected by ground-fault circuit-interupters are required to help prevent ____: Correct answer: Electrocution
___ ___ is used to reduce the chlorine loss by protecting the free chlorine in the pool from the sun's ultraviolet rays, reducing the
- | P a g e
amount of chlorine needed to maintain proper sanitizer levels:
Correct answer: Cyanuric Acid
In Utah, concentration of cyanuric acid in the water must be at least ___ milligrams per liter, but may not exceed 100 mg per liter: Correct answer: 10, 100
Areas exposed to high levels of sunlight should maintain ___- ___ ppm cyanuric acid: Correct answer: 60-80
Under normal sunlight conditions ___-___ ppm cyanuric acid should be maintained: Correct answer: 30-50
Diarrhea in a pool, chlorine level is raised to what and for how
long? Correct answer: 20 ppm, 12.75 hours
Which chemical will lower pH in a pool? Correct answer:
trichlor
Which is the slowest pool filter? Correct answer: Cartridge
What is best for a leaking septic tank? Correct answer: inject
seams with an epoxy resin