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OIT sample test Exam with 100- correct answers updated 2024.
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OIT sample test Exam with 100- correct answers updated 2024.
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OIT sample test Exam with 100% correctanswers updated 2024
what unit is used to measure water pressure - ANSWER- Kilopascals
any space where hazardous gas can accumulate or an oxygen deficient
atmosphere can occur - ANSWER- confined space
1 kPa raises water - ANSWER- 10.2 cm
unit used to measure the total daily or monthly electrical usage - ANSWER-
Kilowatt hours
4" pipe can carry ________________ of water as a 2" pipe (assuming same water
velocity and pressure) - ANSWER- 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 - ANSWER- 7.9 mg/L
example of cross connection - ANSWER- connection between boiler and
domestic water line
most likely cause of noise and vibration in a valve - ANSWER- Backflow in a pipe
, main reason wet wells for pumps pose safety hazard - ANSWER- subject to
collection toxic gases
How is water pressurized in a positive displacement pump - ANSWER- water is
pushed by a screw, piston, gear or diaphragm
grease used to lubricate plant equipment should be - ANSWER- should be the
same grade or exact equivalent as recommended by the equipment manufacturer
2500 L/sec is equal to what in m3/sec - ANSWER- 2.5
What is the name given to the process used to kill pathogenic organisms in water
treatment - ANSWER- Disinfection
OIT not allowed to do - ANSWER- Be the operator with overall operational
responsibility of the system
solution has a pH of 11 most effective way to neutralize - ANSWER- add an acid
rate of flow (in L/s) in a 300mm diameter pipe with a water velocity of 0.8m/s -
ANSWER- 57 L/s
chemical feeder will feed at max rate of 900 kg per day what is it in kg/min -
ANSWER- 0.63
properties of chlorine - ANSWER- greenish/yellow gas with penetrating odour,
heavier than air
"head" in hydraulic systems - ANSWER- height or energy of water above a
specified point
who is primarily responsible for your safety - ANSWER- you
why is methane gas dangerous - ANSWER- it is explosive
what is BOD - ANSWER- Biochemical Oxygen Demand
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