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