ILLINOIS CLASS D WATER LICENSE EXAM WITH COMPLETE
QUESTIONS AND CORRECT VERIFIED ANSWERS(DETAILED
ANSWERS) ALREADY GRADED A+ 100% GUARANTEED TO PASS
CONCEPTS!!!
A 5/8" x 3/4" water meter serves a residence. Over a period of years the meter
__________ in recording actual water used - CORRECT ANSWER-Decreases
To isolate part of a distribution system what type of valve is commonly used? -
CORRECT ANSWER-Gate valve
Trihalomethanes (THMs) are caused by? - CORRECT 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 - CORRECT ANSWER-Higher
THM's should be eliminated from finished water because they cause ? -
CORRECT ANSWER-Cancer
,The maximum contaminant level for THM's is? - CORRECT ANSWER-.080 mg/l
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? - CORRECT ANSWER-
Both will be equal
If the water level in tower 1 is 118 feet what will the pressure reading be at the
base - CORRECT ANSWER-51.1 psi
What is the definition of potable water - CORRECT 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? -
CORRECT 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 - CORRECT ANSWER-curb stop
When collecting THM samples one sample must be taken at a site where the
water has been in the distribution system the longest time - CORRECT 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 - CORRECT
ANSWER-6 months
, What type of water main is most likely to become contaminated from gasoline
saturated soil - CORRECT ANSWER-PVC
What type of materials must not be used as backfill for water mains? - CORRECT
ANSWER-Cinders
Nitrate in levels above _________ mg/L can cause "blue baby" disease -
CORRECT 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? - CORRECT
ANSWER-It is a regulation of the IEPA, and to protect the health of water
consumers
A boil order should be issued for? - CORRECT ANSWER-Until further notice
Upon the issuance of a boil order the IEPA regional office should be notified of the
order because ________________? - CORRECT ANSWER-It's a state regulation
The "C" factor of a pipe is _______________? - CORRECT ANSWER-The
smoothness of the interior of a pipe
QUESTIONS AND CORRECT VERIFIED ANSWERS(DETAILED
ANSWERS) ALREADY GRADED A+ 100% GUARANTEED TO PASS
CONCEPTS!!!
A 5/8" x 3/4" water meter serves a residence. Over a period of years the meter
__________ in recording actual water used - CORRECT ANSWER-Decreases
To isolate part of a distribution system what type of valve is commonly used? -
CORRECT ANSWER-Gate valve
Trihalomethanes (THMs) are caused by? - CORRECT 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 - CORRECT ANSWER-Higher
THM's should be eliminated from finished water because they cause ? -
CORRECT ANSWER-Cancer
,The maximum contaminant level for THM's is? - CORRECT ANSWER-.080 mg/l
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? - CORRECT ANSWER-
Both will be equal
If the water level in tower 1 is 118 feet what will the pressure reading be at the
base - CORRECT ANSWER-51.1 psi
What is the definition of potable water - CORRECT 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? -
CORRECT 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 - CORRECT ANSWER-curb stop
When collecting THM samples one sample must be taken at a site where the
water has been in the distribution system the longest time - CORRECT 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 - CORRECT
ANSWER-6 months
, What type of water main is most likely to become contaminated from gasoline
saturated soil - CORRECT ANSWER-PVC
What type of materials must not be used as backfill for water mains? - CORRECT
ANSWER-Cinders
Nitrate in levels above _________ mg/L can cause "blue baby" disease -
CORRECT 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? - CORRECT
ANSWER-It is a regulation of the IEPA, and to protect the health of water
consumers
A boil order should be issued for? - CORRECT ANSWER-Until further notice
Upon the issuance of a boil order the IEPA regional office should be notified of the
order because ________________? - CORRECT ANSWER-It's a state regulation
The "C" factor of a pipe is _______________? - CORRECT ANSWER-The
smoothness of the interior of a pipe
