2026-2027 Prep for Texas
Wastewater Operator C
Exam with a Review of 790
Questions and Correct
Answers/ TX Class C
Wastewater Test 2026-
2027 (New!)
0
,2026-2027 Prep for Texas Wastewater Operator C Exam
Students studied
C
(793 Questions and Correct Answers)
A Class II safety vest is rated for ________. a. low speed traffic (generally up to 45 mph)
a. low speed traffic (generally up to 45 mph) Class 1 Safety Vests are for the lowest-risk areas. They have a safety yellow or
b. work areas away from street traffic safety orange background, and a minimum of 155 square inches of reflective
c. high speed traffic (greater than 45 mph) strips.
d. situations where traffic does not exceed 25 mph
Class 2 safety vests have bumped up requirements. Like Class 1 (Type O), these
vests are usually sleeveless. The industry rule of thumb is to require these vests on
worksites where traffic flow is 25mph - 50mph.
Class 3 Safety Vests are for the most hazardous environments where visibility is
paramount. Class 3 vest provides the most background material and the most
retroreflective striping. In many cases, these vests have sleeves.
To become a licensed operator, it is necessary to ________. a. pass a test administered by your state's licensing authority
a. pass a test administered by your state's licensing
authority
b. hold a college degree
c. be employed by a city
d. be sponsored by a licensed operator
The authorized agent or ________ must sign the monthly b. executive officer
discharge monitoring report.
a. licensed operator
b. executive officer
c. city manager
d. chief operator
1
,Milk, coffee, or ________ candy relieves throat irritation d. peppermint
caused by chlorine gas inhalation.
a. licorice
b. caramel
c. chocolate
d. peppermint
Hydrogen sulfide is very toxic and deadens the sense of c. smell
________.
a. taste
b. touch
c. smell
d. sight
The ________ test measures the oxygen depleting effect of c. BOD
the wastewater upon the receiving stream.
a. COD
b. DO
c. BOD
d. TSS
The BOD test measures oxygen consumed as organics c. 5/20
are oxidized by biological and chemical action during
incubation for ________ days at _____ °C.
a. 2/20
b. 5/2
c. 5/20
d. 20/5
Before using a chemical, read the ________. b. SDS (formerly known as MSDS)
a. SSD (formerly known as MSSD)
b. SDS (formerly known as MSDS)
c. DSS (formerly known as MDSS)
d. SMS (formerly known as) SMS
Traffic control devices must meet specifications of the a. Texas
_____Manual on Uniform Traffic Control Devices for
Streets and Highways.
a. Texas
b. U.S.
c. DOT
d. OSHA
2
, The three primary types of organics are ________, proteins, b. carbohydrates
and grease.
a. leather
b. carbohydrates
c. minerals
d. paper
When dissolved oxygen is present, it indicates the c. fresh
wastewater is ____ _.
a. odorous
b. anaerobic
c. fresh
d. septic
The ________ decomposition of organic matter produces c. anaerobic
methane that is colorless, odorless, and explosive.
a. aerobic
b. facultative
c. anaerobic
d. all of the above
Examples of point source discharges are ________. c. municipal, industrial, and agricultural wastewater treatment facilities
a. storm water drainage from industry and urban areas
b. seepage from septic tanks and drainfields
c. municipal, industrial, and agricultural wastewater
treatment facilities
d. all of the above
Common weir designs are rectangular, Cipolletti, and a. V-notch
________.
a. V-notch
b. B-notch
c. A-notch
d. Z-notch
An important reason for adequate treatment of a d. all of the above
community's wastewater is __ _.
a. conservation of water
b. reduction of fish kills
c. protection of public health
d. all of the above
3
Wastewater Operator C
Exam with a Review of 790
Questions and Correct
Answers/ TX Class C
Wastewater Test 2026-
2027 (New!)
0
,2026-2027 Prep for Texas Wastewater Operator C Exam
Students studied
C
(793 Questions and Correct Answers)
A Class II safety vest is rated for ________. a. low speed traffic (generally up to 45 mph)
a. low speed traffic (generally up to 45 mph) Class 1 Safety Vests are for the lowest-risk areas. They have a safety yellow or
b. work areas away from street traffic safety orange background, and a minimum of 155 square inches of reflective
c. high speed traffic (greater than 45 mph) strips.
d. situations where traffic does not exceed 25 mph
Class 2 safety vests have bumped up requirements. Like Class 1 (Type O), these
vests are usually sleeveless. The industry rule of thumb is to require these vests on
worksites where traffic flow is 25mph - 50mph.
Class 3 Safety Vests are for the most hazardous environments where visibility is
paramount. Class 3 vest provides the most background material and the most
retroreflective striping. In many cases, these vests have sleeves.
To become a licensed operator, it is necessary to ________. a. pass a test administered by your state's licensing authority
a. pass a test administered by your state's licensing
authority
b. hold a college degree
c. be employed by a city
d. be sponsored by a licensed operator
The authorized agent or ________ must sign the monthly b. executive officer
discharge monitoring report.
a. licensed operator
b. executive officer
c. city manager
d. chief operator
1
,Milk, coffee, or ________ candy relieves throat irritation d. peppermint
caused by chlorine gas inhalation.
a. licorice
b. caramel
c. chocolate
d. peppermint
Hydrogen sulfide is very toxic and deadens the sense of c. smell
________.
a. taste
b. touch
c. smell
d. sight
The ________ test measures the oxygen depleting effect of c. BOD
the wastewater upon the receiving stream.
a. COD
b. DO
c. BOD
d. TSS
The BOD test measures oxygen consumed as organics c. 5/20
are oxidized by biological and chemical action during
incubation for ________ days at _____ °C.
a. 2/20
b. 5/2
c. 5/20
d. 20/5
Before using a chemical, read the ________. b. SDS (formerly known as MSDS)
a. SSD (formerly known as MSSD)
b. SDS (formerly known as MSDS)
c. DSS (formerly known as MDSS)
d. SMS (formerly known as) SMS
Traffic control devices must meet specifications of the a. Texas
_____Manual on Uniform Traffic Control Devices for
Streets and Highways.
a. Texas
b. U.S.
c. DOT
d. OSHA
2
, The three primary types of organics are ________, proteins, b. carbohydrates
and grease.
a. leather
b. carbohydrates
c. minerals
d. paper
When dissolved oxygen is present, it indicates the c. fresh
wastewater is ____ _.
a. odorous
b. anaerobic
c. fresh
d. septic
The ________ decomposition of organic matter produces c. anaerobic
methane that is colorless, odorless, and explosive.
a. aerobic
b. facultative
c. anaerobic
d. all of the above
Examples of point source discharges are ________. c. municipal, industrial, and agricultural wastewater treatment facilities
a. storm water drainage from industry and urban areas
b. seepage from septic tanks and drainfields
c. municipal, industrial, and agricultural wastewater
treatment facilities
d. all of the above
Common weir designs are rectangular, Cipolletti, and a. V-notch
________.
a. V-notch
b. B-notch
c. A-notch
d. Z-notch
An important reason for adequate treatment of a d. all of the above
community's wastewater is __ _.
a. conservation of water
b. reduction of fish kills
c. protection of public health
d. all of the above
3
