Class D Water License BOARD
EVALUATION 2026 GUARANTEED PASS
ANSWERS GRADED A+
● An elevated storage tank had pipe 150 feet above ground when full
water pressure at the bottom psi should be? Answer: 65
● Chlorine dosage for water is 2.7mg/l if chlorine residual after 30
minutes is 0.8mg/l. What is demand expressed in mg/l? Answer: 1.9
● Water is pumped 250 gallons a min. How long to fill 100,000 gallon
tank? Answer: 6.6
● A free chlorine residual of 0.6mg/l is desired how many mg/l of
chlorine will be needed when chlorine demand of water is 2.2mn/l?
Answer: 1.6
● A chlorine dosage of 2mg/l is to be added to 600,000 gallons of water
how many pounds of chlorine 100% are needed to obtain this
concentration? Answer: 10
● The hydrologic cycle is? Answer: Recycling of water between the
earth & atmosphere
, ● Basic water PH reading is? Answer: 8.5
● A chemical of water impacting scaling is? Answer: Calcium
● What is Raw water? Answer: Untreated water
● Regulated chemical compound formed when disinfectants react with
naturally occurring organic matter? Answer: By products THM/HAA
● Diseases by contaminated water also known as waterborn disease are?
Answer: Dysentery, Hyphoid, Giardiasis, Hepatitis
● A fire and explosion exsist if granulated disinfectant, calcium
hydrochlorite come in contact with? Answer: Oil petro products
● Following Lock Out Tag Out (LOTO) the first step a oparater should
take to restart pump after emergency repairs are performed? Answer:
Call the person who owns or put the locks on
● The Texas hazard communication act 1985 requires employers to?
Answer: Provide info on Haz Chem in the work place./rights to know
● A flagger for traffic control Answer: TxDoT/reference guide to work
zone traffic control
EVALUATION 2026 GUARANTEED PASS
ANSWERS GRADED A+
● An elevated storage tank had pipe 150 feet above ground when full
water pressure at the bottom psi should be? Answer: 65
● Chlorine dosage for water is 2.7mg/l if chlorine residual after 30
minutes is 0.8mg/l. What is demand expressed in mg/l? Answer: 1.9
● Water is pumped 250 gallons a min. How long to fill 100,000 gallon
tank? Answer: 6.6
● A free chlorine residual of 0.6mg/l is desired how many mg/l of
chlorine will be needed when chlorine demand of water is 2.2mn/l?
Answer: 1.6
● A chlorine dosage of 2mg/l is to be added to 600,000 gallons of water
how many pounds of chlorine 100% are needed to obtain this
concentration? Answer: 10
● The hydrologic cycle is? Answer: Recycling of water between the
earth & atmosphere
, ● Basic water PH reading is? Answer: 8.5
● A chemical of water impacting scaling is? Answer: Calcium
● What is Raw water? Answer: Untreated water
● Regulated chemical compound formed when disinfectants react with
naturally occurring organic matter? Answer: By products THM/HAA
● Diseases by contaminated water also known as waterborn disease are?
Answer: Dysentery, Hyphoid, Giardiasis, Hepatitis
● A fire and explosion exsist if granulated disinfectant, calcium
hydrochlorite come in contact with? Answer: Oil petro products
● Following Lock Out Tag Out (LOTO) the first step a oparater should
take to restart pump after emergency repairs are performed? Answer:
Call the person who owns or put the locks on
● The Texas hazard communication act 1985 requires employers to?
Answer: Provide info on Haz Chem in the work place./rights to know
● A flagger for traffic control Answer: TxDoT/reference guide to work
zone traffic control
