Wastewater Grade 2 Study Questions Latest Edition (2026/2027) with Verified Answers

Wastewater Grade 2 Study Questions

1 mg/L is similar to 1 part per billion (ppb).
A. True
b. False - ANS-b

A not unusual variety for the pH of uncooked home wastewater is 6.8 to eight.0.
A. True
b. False - ANS-a

A Discharge Monitoring Report is generally submitted to the regulatory enterprise on a day by
day foundation.
A. True
b. False - ANS-b

A facultative micro organism is capable of dwelling under an cardio condition however now not
in an anaerobic condition.
A. True
b. False - ANS-b

A gear pump is a not unusual type of fantastic displacement pump.
A. True
b. False - ANS-a

A grasp pattern is maximum ideal for those constituents.

A. BOD
b. TSS
c. Suspended solids awareness
d. Residual chlorine - ANS-d

A wholesome digester fuel consists in most cases of hydrogen sulfide.
A. True
b. False - ANS-b

A manhole sump or vault can be entered without following confined space entry tactics if it
appears secure.
A. True
b. False - ANS-b

A mechanical seal is used to prevent leaks between the pump casing and shaft.

,A. True
b. False - ANS-a

A pond with a detention time of much less than three days will perform just like:

a. Sedimentation tank
b. Aeration tank
c. Trickling filter
d. RBC - ANS-a

A SCADA system is able to monitoring and controlling gadget from a faraway location.
A. True
b. False - ANS-a

A moderate seal leakage have to be discovered while a pump is working to maintain the
packings cool.
A. True
b. False - ANS-a

A answer with a pH of 13 is a robust base.
A. True
b. False - ANS-a

A trickling clear out is a form of activated sludge method usually operated in the prolonged
aeration mode.
A. True
b. False - ANS-b

Abnormal operation in a pond will now not occur if it's miles overloaded with BOD.
A. True
b. False - ANS-b

Algae growth will be quicker while there may be much less sunlight.
A. True
b. False - ANS-b

Algae is not crucial to the a success operation of both cardio and facultative ponds.
A. True
b. False - ANS-b

Algae uses carbon dioxide inside the pond to produce loose oxygen for the cardio micro
organism.
A. True
b. False - ANS-a

,Alkalinity is the capacity of a liquid to neutralize acid.
A. True
b. False - ANS-a

Alkalinity is the ability of a liquid to neutralize base.
A. True
b. False - ANS-b

All microorganisms cause disease.
A. True
b. False - ANS-b

Always pour water into acid and in no way the alternative manner round.
A. True
b. False - ANS-b

An impeller is an important part of a centrifugal pump that spins the liquid at high speed.
A. True
b. False - ANS-a

An growth inside the acid/alkalinity ratio for an anaerobic digester approach:

a. The digester ls in an excellent circumstance
b. The carbon dioxide content material is decreasing
c. Acid attention is increasing or alkalinity is lowering
d. PH of the sludge within the digester is increasing - ANS-c

An boom within the unstable acids/alkalinity ratio in an anaerobic digester suggests that a
hassle is growing.
A. True
b. False - ANS-a

An MPN test is taken into consideration fine when there are gas bubbles within the tube.
A. True
b. False - ANS-a

An oxidation ditch is commonly used for small communities.
A. True
b. False - ANS-a

Anaerobic decomposition of sewage will launch hydrogen sulfide.
A. True
b. False - ANS-a

, BOD and suspended solids are measured the use of snatch samples.
A. True
b. False - ANS-b

Breakpoint chlorination is the addition of chlorine to wastewater until the chlorine call for has
been met.
A. True
b. False - ANS-a

Chain-pushed scrapers called "flights" are commonly used as mechanical grit collectors.
A. True
b. False - ANS-a

Chlorine call for concentration is frequently decided the usage of the DPD check.
A. True
b. False - ANS-b

Chlorine gas is not flammable.
A. True
b. False - ANS-a

Chlorine gasoline ls brown in colour.
A. True
b. False - ANS-b

Chlorine residual is the chlorine attention in the wastewater after the chlorine demand has been
met.
A. True
b. False - ANS-a

Class A hearth extinguisher must be used for an electrical fire.
A. True
b. False - ANS-b

Coliform results are suggested as MPN/one hundred ml.
A. True
b. False - ANS-a

Denitrification does now not purpose sludge to upward push in a secondary clarifier.
A. True
b. False - ANS-b

During the day what generally occurs to a pond because of the algae?