Potpourri
Chlorine gas is how many times heavier than air ?
A. 1.5
B.2.5
C.4.0
D.6.0
What is B...2.5 times heavier than air
Always add water to acid, not acid to water .
A. True
B. False
What is B.....False
Never add water to acid, only add acid to water
Which chlorine emergency leak repair kit is used on a 150 lb cylinder of chlorine?
A. Kit A
B. Kit B
C. Kit C D. Kit D
What is A.......Kit A is for use on a 150 lb cylinder of chlorine
The maximum amount of gas that can be withdrawn from a 2000 lb cylinder of chlorine per day is:
A. 100 lb/day
B. 40 lb / day
C. 150 lb/day D. 400 lb/day
What is D.......400 lb/day
What is the most important controlling factor of a safety program ?
A. education
B. on the job experience
C. effective infographics
D. Well written materials
What is A.......Education
This gas causes damage to concrete and creates odor problems?
A. chlorine
B. hydrogen sulfide
C. carbon Monoxide
D. Sulfur dioxide
What is B .....Hydrogen sulfide
What are short safety meetings usually held near the work site called ?
A. safety briefing meetings
B. Tailgate safety meetings
C. on the job training sessions
D. New employee orientations
What is B......Tailgate safety meetings
The main concern of an NPDES permit for operators is the:
A. Effluent limitations it establishes
B. Influent limitations it establishes
C. type of processes to avoid
D. Chemcials required for sterilization of microorganisms
What is: A.......Effluent limitations it establishes
Which processes are commonly included in preliminary treatment processes?
A. settling and filtering
B. grit removal, shredding, and screening
C. dewatering, digestion, and thickening
D. Flow measurement and equalization
What is : B.... Grit removal, shredding, and screening
What are some types of wastewater collection systems?
A. low pressure and gravity collection systems
B. Force main and high pressure collection systems
C. Suction and drainage collection systems
D. Distribution and runoff collection systems
What is: A......low pressure and gravity collection systems
Chlorine and sulfur dioxide are very different when considering safety and health aspects of the two chemicals.
A. True
B. False
The answer is B....False
Never start a peristaltic pump with the the discharge valve closed.
A. True
B. False
What is : B....False
Never start a positive displacement pump with the discharge valve closed
The greatest hazard involved in working on or in a clarifier is the danger of:
A. Drowning
B. Electrical Hazards
C. Slipping
D. Strains and sprains
What is C..... Slipping
When changing a chlorine or sulfur dioxide container, you should check for leaks:
A. by looking for leaks and puddles
B. by noticing an odor of gas
C. by using aqua ammonia vapor
D. by weighing the containers
What is: C......by using aqua ammonia vapor
A partially treated or completely treated flow from. a reservoir basin, or treatment process or treatment plant is :
A. Organic waste
B. Inorganic waste
C. Effluent
D. Influent
What is C......Effluent
Waste material that may come from animal or plant sources, and is consumed by bacteria.
A. Inorganic Waste
B. Organic Waste
C. Total Suspended Solids
D. Suspended Solids
What is B.....Organic Waste
The settleable solids separated from liquids during processing in a clarifier.
A. Effluent
B. Influent
C. Sludge
D. Suspended Solids
What is C.....Sludge
Bacteria that live and reproduce only in an environment containing oxygen.
A. Anaerobic Bacteria
B. Facultative Bacteria
C. Aerobic Bacteria
D. Filamentous Bacteria
What is C.....Aerobic Bacteria
Bacteria that live and reproduce in an environment containing no free or dissolved oxygen.
A. Aerobic Bacteria
B. Anaerobic Bacteria
C. Facultative Bacteria
D. Filamentous Bacteria
What is B.....Anaerobic bacteria
The conversion to a form that resists change. Organic material is ____ by bacteria that convert material to gases.
A. Stabilized
B. Converted
C. Disinfected
D. Sterilized
What is A...... Stabilized
These microorganisms may be viruses, bacteria, fungi, protozoa and infects people or animals.
A. Filamentous
B. Stalked Ciliates
C. Pathogenic
D. Stalked Ciliates
What is C....... Pathogenic
A one or two liter graduated cylinder that measures the the settling rate of settleable solids:
A. Pipet
B. Settleometer
C. Dissolved Oxygen Meter
D. Amplimetric Titrator
What is B......Settleometer
A sewer designed to carry both sanitary wastewater and storm water or surface water runoff.
A. Forcemain
B. Combined Sewer
C. Sanitary Sewer
D. Pressure Sewer
What is B....Combined sewer
Raw untreated or partially treated water flowing into a reservoir, basin, treatment process, or treatment plant.
A. Influent
B. Effluent
C. Combined Sewer
D. Surface Run Off
What is A.....Influent
A wastewater treatment process that takes place in a rectangular or circular tank and allows those substances in wastewater that readily settle or float to be separated from the wastewater.
A. Teritary Treatment
B. Primary Treatment
C. Aeration Treatment
D. Trickling Filter
What is B.... Primary Treatment
This process is commonly a type of biological treatment followed by the aeration tank, trickling filter, or RBC.
A. Secondary Treatment
B. Primary Treatment
C. Teritary Treatment
D. Preliminary Treatment
What is A.....Secondary treatment or secondary clarifier
A device used to retain or remove suspended or floating objects in wastewater. It consist of bars, rods, wires, gratings, wire mesh, or perforated plates.
A. Grit Tank
B. Bar Screens
C. Primary Clarifier
D. Tea Cup
What is B.... Bar Screens
A wall or plate placed in an open channel and used to measure flow of water or to control flow to ensure a uniform flow rate.
A. Parshall flume
B. Weir
C. Baffle
D. Flights
what is B.... Weir
The material used in a trickling filter or RBC which slime accumulates and organisms grow.
A. Sloughing
B. Humus
C. Media
D. Diffuser
what is C... Media
Waste material (sand, iron, salt, calcium, and other mineral materials) that is only slightly affected by the action of organisms.
A. Organic waste
B. Inorganic waste
C. MLVSS
D. MLSS
What is B....Inorganic waste