UTB14 Utilities Equipment and Maintenance Flashcards
What is the first thing you should do before installing an industrial food grinder?
Read the entire installation manual.
What is the function of the impeller in a food grinder?
Pulverize the garbage
What diameter waste pipe is needed when installing an industrial sink?
2-inch
What is the proper procedure for dislodging something stuck in the impeller?
Use a broom stick
What are steam kettles commonly called?
Coppers
What is the temperature tolerance of a steam table thermostat?
± 5° F
How do you ensure the safe and efficient operation of a range?
Observe a PM schedule.
How often should preventative maintenance be performed on the M-59 Field Range?
250 hours
What is the maximum time interval allowed before pumping out a grease trap?
3 months
What standard is used for all work concerning emergency eye/face wash equipment?
ANSI Z358.1
What is sufficient water flow in gallons per minute from a fire hydrant for firefighting?
250 GPM
Why are dry hydrants preferable over wet hydrants in cold weather?
They will not freeze
Why is a breakaway flange used in the construction of a fire hydrant?
To fracture should large stresses be applied to the hydrant
(True or False) A traffic model fire hydrant is used near traffic because it is smaller than a standard fire hydrant.
Flase
In which manual are the criteria for fire hydrant locations found?
MIL-HDBK-1008
(True or False) Fire hydrants should be located at least 50 feet from a building but never closer than 25 feet.
True
What is the most common error made when installing a new fire hydrant?
Improper surface grading
What is the minimum distance any utility or equipment should be placed by a fire hydrant?
3 feet
(True or False) Utlitiesmen should only be concerned with hydrostatic testing of fire hydrants.
True
What is the minimum water pressure from a fire hydrant required for safe firefighting?
20 psi
When performing hydrostatic testing, what is the recommended testing medium under pressure?
H20
What is the definition of backflow?
Flow of unintended liquids into the potable water supply
What is the most common form of backflow?
Back-siphonage
How is back-siphonage caused?
Negative pressure upstream
What are the classes of water hazards?
Pollutant
Health hazard
Lethal hazard
Which backflow device is the only acceptable means of protecting against lethal hazards?
Air gap
What are the hydraulic considerations when installing a backflow preventer?
sizing
pressure
temperature
Which is NOT a type of volumetric dry feeder? A. Disk B. Screw C. Belt D. Turbine
D. Turbine
What part of the regeneration unit should be cleaned thoroughly every 6 months?
The brine measuring tank
Baffled mixing basins require cleaning at what regular frequency?
Semiannually
What intervals should you check the paddle rotation on flocculator basins to ensure all flocculators are working properly?
Monthly
What part(s) of a flocculator basin should be checked for silt penetration?
The underwater bearings
Cathodic protection fights corrosion in what manner?
Current flows from the dc source through the soil or water to the metal to be protected.
How often should wash water troughs be inspected for corrosion?
6 month intervals
Semiannually
Most diatomite filter installations in potable water supply plants are of what type?
Pressure
A 30-percent solution of hydrochloric acid should be used to clean porous plate diffusers clogged with_____.
Iron oxide particles
