USPA D WRITTEN EXAM LICENSE EXAM ACTUAL EXAM QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS) |AGRADE
Two Towers are both 125 feet high, when full, contain 122 feet of water. Tower 1 holds 150,000 gallons.
Tower 2 holds 500,000 gallons. Each has a pressure gauge at the base. Which will register the most
pressure in psi? -(ANSWER)Both will be equal
If the water level in tower 1 is 118 feet what will the pressure reading be at the base -(ANSWER)51.1 psi
What is the definition of potable water -(ANSWER)Water that does not contain objectable pollution,
contamination, or infective agents and is considered safe for drinking
What is the first item used when installing a service line to a customer? -(ANSWER)Corporation stop
If a meter to a residence is located in the basement what should be located between the water main
and the house -(ANSWER)curb stop
A 5/8" x 3/4" water meter serves a residence. Over a period of years the meter __________ in recording
actual water used -(ANSWER)Decreases
To isolate part of a distribution system what type of valve is commonly used? -(ANSWER)Gate valve
Trihalomethanes (THMs) are caused by? -(ANSWER)Reaction of chlorinated water with numeric
materials found in surface water sources
The longer the contact time water and chlorine residuals enjoy the ________ the THM level will
probably be -(ANSWER)Higher
THM's should be eliminated from finished water because they cause ? -(ANSWER)Cancer
, USPA D WRITTEN EXAM LICENSE EXAM ACTUAL EXAM QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS) |AGRADE
The maximum contaminant level for THM's is? -(ANSWER).080 mg/l
When collecting THM samples one sample must be taken at a site where the water has been in the
distribution system the longest time -(ANSWER)True
An applicant for a class d test who has graduated high school but has no approved training credits must
have ____________ "hands on" experience -(ANSWER)6 months
What type of water main is most likely to become contaminated from gasoline saturated soil -
(ANSWER)PVC
What type of materials must not be used as backfill for water mains? -(ANSWER)Cinders
Nitrate in levels above _________ mg/L can cause "blue baby" disease -(ANSWER)10
A boil order must be issued if systems pressure drops below 20 psi or if contaminated of any part of the
system is suspected. Why? -(ANSWER)It is a regulation of the IEPA, and to protect the health of water
consumers
A boil order should be issued for? -(ANSWER)Until further notice
Upon the issuance of a boil order the IEPA regional office should be notified of the order because
________________? -(ANSWER)It's a state regulation
The "C" factor of a pipe is _______________? -(ANSWER)The smoothness of the interior of a pipe
DETAILED ANSWERS (VERIFIED ANSWERS) |AGRADE
Two Towers are both 125 feet high, when full, contain 122 feet of water. Tower 1 holds 150,000 gallons.
Tower 2 holds 500,000 gallons. Each has a pressure gauge at the base. Which will register the most
pressure in psi? -(ANSWER)Both will be equal
If the water level in tower 1 is 118 feet what will the pressure reading be at the base -(ANSWER)51.1 psi
What is the definition of potable water -(ANSWER)Water that does not contain objectable pollution,
contamination, or infective agents and is considered safe for drinking
What is the first item used when installing a service line to a customer? -(ANSWER)Corporation stop
If a meter to a residence is located in the basement what should be located between the water main
and the house -(ANSWER)curb stop
A 5/8" x 3/4" water meter serves a residence. Over a period of years the meter __________ in recording
actual water used -(ANSWER)Decreases
To isolate part of a distribution system what type of valve is commonly used? -(ANSWER)Gate valve
Trihalomethanes (THMs) are caused by? -(ANSWER)Reaction of chlorinated water with numeric
materials found in surface water sources
The longer the contact time water and chlorine residuals enjoy the ________ the THM level will
probably be -(ANSWER)Higher
THM's should be eliminated from finished water because they cause ? -(ANSWER)Cancer
, USPA D WRITTEN EXAM LICENSE EXAM ACTUAL EXAM QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS) |AGRADE
The maximum contaminant level for THM's is? -(ANSWER).080 mg/l
When collecting THM samples one sample must be taken at a site where the water has been in the
distribution system the longest time -(ANSWER)True
An applicant for a class d test who has graduated high school but has no approved training credits must
have ____________ "hands on" experience -(ANSWER)6 months
What type of water main is most likely to become contaminated from gasoline saturated soil -
(ANSWER)PVC
What type of materials must not be used as backfill for water mains? -(ANSWER)Cinders
Nitrate in levels above _________ mg/L can cause "blue baby" disease -(ANSWER)10
A boil order must be issued if systems pressure drops below 20 psi or if contaminated of any part of the
system is suspected. Why? -(ANSWER)It is a regulation of the IEPA, and to protect the health of water
consumers
A boil order should be issued for? -(ANSWER)Until further notice
Upon the issuance of a boil order the IEPA regional office should be notified of the order because
________________? -(ANSWER)It's a state regulation
The "C" factor of a pipe is _______________? -(ANSWER)The smoothness of the interior of a pipe
