Random Mixed Other Questions Flashcards
Which type of pipe is preferred for wastewater main construction under heavy traffic loads or in crossing underneath waterways?
A: Steel pipe
B: PVC pipe
C: Concrete non-reinforced pipe
D: Vitrified clay pipe
A: Steel Pipe
Which of the following maintenance activities require proper safety procedures?
A: System inspection
B: Blockage removal
C: Cleaning and repair
D: All of the above
D: All of the above
Safety procedures are required for basically all on the job duties
Arriving at your work site locker room, you find a hard hat that has a cracked brim. You should:
A.Leave the hard hat where it is
B.Repair the hard hat
C.Clean the hard hat and return it to its owner
D. Replace the hard hat with a new one
D: Replace the hard hat with a new one
The most common types of hearing protection are:
Earmuffs and disposable ear plugs
All operators should be able to:
A. Troubleshoot all electrical problems that occur
B. Follow the proper lockout and tagging procedures
C. Conduct electrical repairs
D. Modify electrical sources and controls
B: Follow the proper lockout a d tagging procedures
Which stage of wastewater treatment is responsible for the removal or inactivation of pathogenic organisms and removal of nutrients such as nitrogen and phosphorus? A: Pretreatment B: Primary treatment C: Secondary treatment D: Tertiary treatment*l
D: Tertiary Treatment
As sunlight is used by algae in photosynthesis, pH will________ and concentrations of ___________ will decrease.
A: Increase; Carbon dioxide
B: Increase; Hydrogen ions
C: Decrease; Oxygen
D: Decrease; Ammonia
A: Increase; Carbon dioxide
What can cause a temporary reduction in pH in a wastewater stabilization pond after spring thaw?
A: Increased production of hydrogen sulfide
B: Longer daylight hours, causing increased algae growth
C: Increased decomposition of accumulated sludge
D: Reduction in organic acid production
A: Increased production of hydrogen sulfide
Which type of wastewater pond requires a minimum of a three-year storage capacity?
A: Facultative pond
B: Storage pond
C: Aerated pond
D: Total retention/evaporation pond
D: Total retention/evaporation pond
Large rocks used to protect interior berm slopes, are known as:
A: Freeboard
B: Log booms
C: Rip rap
D: Flotsam
C: Rip Rap
Pressure increases in a distribution system are controlled through the installation of: A: Booster stations B: Pressure Relief Valves C: Air Relief Valves D: Lift Stations
B: Pressure Relief Valves
Where an end user requires an uninterrupted supply of water, what type of water services should be installed?
A.Multiple
B.Larger
C.Domestic
D: Fire
A.Multiple
Which type of pipe is reinforced by steel, lined by epoxy, and ranges in size from 300 mm and upwards?
A. Steel pipe
B: Concrete Reinforced Pipe
C: Fiberglass Reinforced Pipe
D: Ductile Iron pipe
B: Concrete Reinforced Pipe
What is the most commonly found valve in distribution systems?
A: Gate Valve
B: Butterfly Valve
C: Check Calve
D: Globe Valve
A: Gate Valve
How does a curb stop differ from a corporation stop (Best answer)?
A: The curb stop operating mechanism is mounted on the top of the unit instead of on the side.
B: It serves a residential user instead of a commercial user.
C: Only a corporation stop can be operated after backfilling.
D. There are no differences between the two.
A: The curb stop operating mechanism is mounted on the top of the unit instead of on the side.
Water from which of the following sources is likely to require the least extensive treatment? A: Storm water retention ponds B: Lakes and reservoirs C: Rivers D: Groundwater
D: Groundwater
Which of the following lists water distribution steps in the correct order?
A: Low lift pumps, filtration, high-lift pumps, reservoir
B: Clear-well storage, reservoir, high-lift pumps
C: storage, Mixing, sedimentation (clarification) tank, high-lift pumps clear-well
D. Mixing, low-lift pumps, post-clarification, chemical addition, reservoir
A: Low lift pumps, filtration, high-lift pumps, reservoir
Which of the following would be the most suitable injection point for chlorine, after the solids are removed?
A: Raw water intake
B: Between filters and clear-wells
C: Between clarifiers and filters
D. At hydrants in the distribution system
B: Between filters and clear-wells
