REHS Exam Questions and Answers |
Detailed Review with Correct
Solutions | Grade A+
Which will raise the pH of a pool?
a. Calcium Bicarbonate
b. Calcium Carbonate
c. Soda Ash or Caustic Soda -✓✓Soda Ash or Caustic Soda
Soda ash is -✓✓Sodium Carbonate NaCO3
Caustic Soda is -✓✓NaOH
Which chemical is used to oxygenate swimming pool water?
a. Ozone
b. Sodium Carbonate
c. Sodium Bicarbonate
d. Calcium Carbonate -✓✓Sodium Carbonate
How would a swimmer most likely contract Legionella pneumonophila from a
pool?
a. ingestion of pool water
,b. direct contact with pool water
c. inhalation of pool water -✓✓inhalation of pool water
Swimming pool water clarity is measured in NTUs, it is recommended that a level
of 0.5 NTU:
a. Shall be maintained
b. Shall not be exceeded
c. Is a minimum level
d. Is a maximum level -✓✓Shall not be exceeded
Microbe entirely responsible for skin infections in a whirlpool is: -
✓✓Pseudomonas Aeruginosa
The formula: Volume of pool (gal) / pump flow rate (gpm) x 60 (min/hr) =
turnover rate will tell the:
a. Number of hours it will take for the entire contents of pool to pass through the
filters
b. gallons per minute flow rate
c. chlorine demand
d. efficiency of pumps -✓✓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:
a. 2-3 hours
,b. 6-8 hours
c. 10-12 hours
d. 12-24 hours -✓✓6-8 hours
The water depth should be clearly marked on the pool perimeter for every ___ of
depth change:
a. 6 foot
b. 5 foot
c. 2 foot
d. 1 foot -✓✓2 foot
It has been found that pools less than 30 feet wide and with a surface area of less
than 1600 sq feet:
a. may utilize skimmers instead of gutters
b. may utilize gutters instead of skimmers
c. are not required to have disinfectant feeders
d. do not have to use continuous equipment operation -✓✓may utilize skimmers
instead of gutters
The pool must be designed to:
a. fit the expected numbers of swimmers
b. with oversized filters to meet unexpected peak demands
, c. with a variety of filter types to provide filtering options for the operator -✓✓fit
the expected numbers of swimmers
The fresh water supply line to the pool must:
a. have a direct solid connection to the public water supply
b. fill to the pool through an approved air gap
c. have an approved pump hooked to the public water supply line to suck the water
to the pool for fast fills
d. none of the above -✓✓fill to the pool through an approved air gap
In large pools with outlets more than 5 feet from the end wall, pool inlets should be
located every:
a. 30 feet
b. 10 feet
c. 20 feet
d. 5 feet -✓✓20 feet
Pool inlets should be located a minimum of 10 inches to 15 inches below the water
line to:
a. ensure good mixing
b. prevent clogging
c. prevent loss of disinfectant
d. ensure mixing of pH additives poured into the pool -✓✓prevent loss of
disinfectant
Detailed Review with Correct
Solutions | Grade A+
Which will raise the pH of a pool?
a. Calcium Bicarbonate
b. Calcium Carbonate
c. Soda Ash or Caustic Soda -✓✓Soda Ash or Caustic Soda
Soda ash is -✓✓Sodium Carbonate NaCO3
Caustic Soda is -✓✓NaOH
Which chemical is used to oxygenate swimming pool water?
a. Ozone
b. Sodium Carbonate
c. Sodium Bicarbonate
d. Calcium Carbonate -✓✓Sodium Carbonate
How would a swimmer most likely contract Legionella pneumonophila from a
pool?
a. ingestion of pool water
,b. direct contact with pool water
c. inhalation of pool water -✓✓inhalation of pool water
Swimming pool water clarity is measured in NTUs, it is recommended that a level
of 0.5 NTU:
a. Shall be maintained
b. Shall not be exceeded
c. Is a minimum level
d. Is a maximum level -✓✓Shall not be exceeded
Microbe entirely responsible for skin infections in a whirlpool is: -
✓✓Pseudomonas Aeruginosa
The formula: Volume of pool (gal) / pump flow rate (gpm) x 60 (min/hr) =
turnover rate will tell the:
a. Number of hours it will take for the entire contents of pool to pass through the
filters
b. gallons per minute flow rate
c. chlorine demand
d. efficiency of pumps -✓✓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:
a. 2-3 hours
,b. 6-8 hours
c. 10-12 hours
d. 12-24 hours -✓✓6-8 hours
The water depth should be clearly marked on the pool perimeter for every ___ of
depth change:
a. 6 foot
b. 5 foot
c. 2 foot
d. 1 foot -✓✓2 foot
It has been found that pools less than 30 feet wide and with a surface area of less
than 1600 sq feet:
a. may utilize skimmers instead of gutters
b. may utilize gutters instead of skimmers
c. are not required to have disinfectant feeders
d. do not have to use continuous equipment operation -✓✓may utilize skimmers
instead of gutters
The pool must be designed to:
a. fit the expected numbers of swimmers
b. with oversized filters to meet unexpected peak demands
, c. with a variety of filter types to provide filtering options for the operator -✓✓fit
the expected numbers of swimmers
The fresh water supply line to the pool must:
a. have a direct solid connection to the public water supply
b. fill to the pool through an approved air gap
c. have an approved pump hooked to the public water supply line to suck the water
to the pool for fast fills
d. none of the above -✓✓fill to the pool through an approved air gap
In large pools with outlets more than 5 feet from the end wall, pool inlets should be
located every:
a. 30 feet
b. 10 feet
c. 20 feet
d. 5 feet -✓✓20 feet
Pool inlets should be located a minimum of 10 inches to 15 inches below the water
line to:
a. ensure good mixing
b. prevent clogging
c. prevent loss of disinfectant
d. ensure mixing of pH additives poured into the pool -✓✓prevent loss of
disinfectant
