OIT sample test Questions with Complete
Solutions (Latest 2025)
what unit is used to measure water pressure - Correct
Answers ✅Kilopascals
any space where hazardous gas can accumulate or an
oxygen deficient atmosphere can occur - Correct Answers
✅confined space
1 kPa raises water - Correct Answers ✅10.2 cm
unit used to measure the total daily or monthly electrical
usage - Correct Answers ✅Kilowatt hours
4" pipe can carry ________________ of water as a 2" pipe
(assuming same water velocity and pressure) - Correct
Answers ✅same volume
a treatment plant removes 97.4% BOD from wastewater. If
BOD entering is 305 mg/L, what will the BOD in wastewater
be leaving - Correct Answers ✅7.9 mg/L
example of cross connection - Correct Answers
✅connection between boiler and domestic water line
most likely cause of noise and vibration in a valve - Correct
Answers ✅Backflow in a pipe
, OIT sample test Questions with Complete
Solutions (Latest 2025)
main reason wet wells for pumps pose safety hazard -
Correct Answers ✅subject to collection toxic gases
How is water pressurized in a positive displacement pump -
Correct Answers ✅water is pushed by a screw, piston, gear
or diaphragm
grease used to lubricate plant equipment should be - Correct
Answers ✅should be the same grade or exact equivalent as
recommended by the equipment manufacturer
2500 L/sec is equal to what in m3/sec - Correct Answers
✅2.5
What is the name given to the process used to kill pathogenic
organisms in water treatment - Correct Answers
✅Disinfection
OIT not allowed to do - Correct Answers ✅Be the operator
with overall operational responsibility of the system
solution has a pH of 11 most effective way to neutralize -
Correct Answers ✅add an acid
Solutions (Latest 2025)
what unit is used to measure water pressure - Correct
Answers ✅Kilopascals
any space where hazardous gas can accumulate or an
oxygen deficient atmosphere can occur - Correct Answers
✅confined space
1 kPa raises water - Correct Answers ✅10.2 cm
unit used to measure the total daily or monthly electrical
usage - Correct Answers ✅Kilowatt hours
4" pipe can carry ________________ of water as a 2" pipe
(assuming same water velocity and pressure) - Correct
Answers ✅same volume
a treatment plant removes 97.4% BOD from wastewater. If
BOD entering is 305 mg/L, what will the BOD in wastewater
be leaving - Correct Answers ✅7.9 mg/L
example of cross connection - Correct Answers
✅connection between boiler and domestic water line
most likely cause of noise and vibration in a valve - Correct
Answers ✅Backflow in a pipe
, OIT sample test Questions with Complete
Solutions (Latest 2025)
main reason wet wells for pumps pose safety hazard -
Correct Answers ✅subject to collection toxic gases
How is water pressurized in a positive displacement pump -
Correct Answers ✅water is pushed by a screw, piston, gear
or diaphragm
grease used to lubricate plant equipment should be - Correct
Answers ✅should be the same grade or exact equivalent as
recommended by the equipment manufacturer
2500 L/sec is equal to what in m3/sec - Correct Answers
✅2.5
What is the name given to the process used to kill pathogenic
organisms in water treatment - Correct Answers
✅Disinfection
OIT not allowed to do - Correct Answers ✅Be the operator
with overall operational responsibility of the system
solution has a pH of 11 most effective way to neutralize -
Correct Answers ✅add an acid
