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.
