ADEQ Wastewater Treatment 1 (Latest
) Questions with Answers
100% Correct {Grade A}
What should an operator do before using a pH meter to obtain a reliable result? -
Correct answer Calibrate the pH meter.
Chemical storage containment should be located so that if one ruptures, the chemicals
are:
a. Securely contained
b. Pumped to the effluent
c. Discharged to nearby surface water
d. Diverted to subsurface aquifers - Correct answer Securely contained
Which of the following chemicals are used for disinfection?
a. Muriatic acid
b. Calcium hypochlorite (dry form of chlorine)
c. Sodium hydroxide
d. Sodium chloride - Correct answer Calcium hypochlorite (dry form of chlorine)
,The simplest device used to measure flow in an open channel is:
a. Weir
b. Ultrasonic meter
c. Magnetic meter
d. Orifice plate - Correct answer Weir
The most commonly used device to measure large wastewater flow is:
a. 90° V-notch weir
b. Parshall flume
c. Palmer-Bowlus flume
d. Broad-crested weir - Correct answer Parshall Flume
Routine weir maintenance should include checking the:
a. Level indicator
b. Wet bulb
c. Volume of the basin
d. Power supply - Correct answer Volume of the basin
,Chlorine is very corrosive when combined with:
a. Water
b. Oxygen
c. Alum
d. Carbon - Correct answer Water
Concentrations of chlorine gas in excess of 1,000 ppm are:
a. Flammable
b. Fatal after a few breaths
c. Explosive
d. Dangerous after 15 minutes - Correct answer Fatal after a few breaths
Septic wastewater MOST likely has a DO range of:
a. 0 mg/mL
b. SCBA (spelled out)
c. Dust and mist filter mask
d. Half-face cartridge respirator - Correct answer 0 mg/mL
, Which protection equipment should be selected when responding to a chlorine gas
leak?
a. Full-face cartridge respirator
b. SCBA
c. Dust and mist filter mask
d. Half-face cartridge respirator - Correct answer SCBA
Reason to use prechlorination at a wastewater treatment facility?
a. Decrease TSS load
b. Begin sterilization process
c. Inhibit growth of odor-producing bacteria
d. Promote settling of inorganic materials - Correct answer Inhibit growth of odor-
producing bacteria
The electrical current draw rate is measured in?
a. Volts
b. Amps
) Questions with Answers
100% Correct {Grade A}
What should an operator do before using a pH meter to obtain a reliable result? -
Correct answer Calibrate the pH meter.
Chemical storage containment should be located so that if one ruptures, the chemicals
are:
a. Securely contained
b. Pumped to the effluent
c. Discharged to nearby surface water
d. Diverted to subsurface aquifers - Correct answer Securely contained
Which of the following chemicals are used for disinfection?
a. Muriatic acid
b. Calcium hypochlorite (dry form of chlorine)
c. Sodium hydroxide
d. Sodium chloride - Correct answer Calcium hypochlorite (dry form of chlorine)
,The simplest device used to measure flow in an open channel is:
a. Weir
b. Ultrasonic meter
c. Magnetic meter
d. Orifice plate - Correct answer Weir
The most commonly used device to measure large wastewater flow is:
a. 90° V-notch weir
b. Parshall flume
c. Palmer-Bowlus flume
d. Broad-crested weir - Correct answer Parshall Flume
Routine weir maintenance should include checking the:
a. Level indicator
b. Wet bulb
c. Volume of the basin
d. Power supply - Correct answer Volume of the basin
,Chlorine is very corrosive when combined with:
a. Water
b. Oxygen
c. Alum
d. Carbon - Correct answer Water
Concentrations of chlorine gas in excess of 1,000 ppm are:
a. Flammable
b. Fatal after a few breaths
c. Explosive
d. Dangerous after 15 minutes - Correct answer Fatal after a few breaths
Septic wastewater MOST likely has a DO range of:
a. 0 mg/mL
b. SCBA (spelled out)
c. Dust and mist filter mask
d. Half-face cartridge respirator - Correct answer 0 mg/mL
, Which protection equipment should be selected when responding to a chlorine gas
leak?
a. Full-face cartridge respirator
b. SCBA
c. Dust and mist filter mask
d. Half-face cartridge respirator - Correct answer SCBA
Reason to use prechlorination at a wastewater treatment facility?
a. Decrease TSS load
b. Begin sterilization process
c. Inhibit growth of odor-producing bacteria
d. Promote settling of inorganic materials - Correct answer Inhibit growth of odor-
producing bacteria
The electrical current draw rate is measured in?
a. Volts
b. Amps
