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Exam 3 - Commercial Contractor Exam questions and correct answers (elaborations) with 100% accurate , verified , latest fully updated , 2024/2025 ,already passed , graded a+, complete solutions guarantee distinctions rationales| 5-star rating
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  • Commercial Construction

Exam 3 - Commercial Contractor Exam questions and correct answers (elaborations) with 100% accurate , verified , latest fully updated , 2024/2025 ,already passed , graded a+, complete solutions guarantee distinctions rationales| 5-star rating

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  • August 5, 2024
  • 5
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

Subjects

  • exam 3 commercial contractor exam

Written for

  • Commercial Construction
  • Commercial Construction

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Exam 3 - Commercial Contractor Exam
1000 gallons - ANS-minimum septic tank size

125 gallons
takes into consideration the type of facility served and the estimated peak daily sewage flow -
ANS-minimum size of grease trap

150 gallons per bedroom - ANS-residential facilities will use what to estimate the number of
gallons per day sewage flow

4" - ANS-walls, bottoms, and lids poured-in-place septic tanks shall have a minimum thickness
of

60-75% the interior volume of the absorption lines to be dosed
all tanks shall have alarms and switches that notify the owner of a malfunction - ANS-dosing
tank liquid capacity

a pass-thru hole or slot equal to or greater than the diameter of the inlet pipe is positioned below
the liquid surface 25-50% of total liquid depth - ANS-compartment partitions will be constructed
so__

a uniform live load of 150lbs per square foot in addition to all loads which an underground tank
is normally subjected - ANS-tank must be able to withhold

all systems that use a 4" distribution pipe including; conventional, polystyrene, and bundled pipe
- ANS-dosing shall be based on 1/5 gallon per linear foot

All tanks shall be equipped with 4" PVC, ASTM 3034 rated or equivalent T's at the inlet and
outlet end of the tank - ANS-"T's" and filters

any contractor installing an ATU must be authorized by the manufacturer
must be able to show proof of authorization - ANS-authorized personnel

any facility that produces a waste stream with BODs (biological oxygen demand) and TSS (total
suspended solids) higher than 200mg/l shall be required to pretreat the waste to reduce BODs
and TSS to 200mg/l or below before application to the absorption field - ANS-pretreatment of
high strength wastewater

any on-site sewage system greater than 10,000 gallons per day on a single property with a total
daily flow of 10,000 must be referred to the Georgia environmental protection division for
permitting - ANS-system size

, Any wastewater flows containing chemicals that may be harmful to the environment (petroleum,
pesticides, industrial processing agents) shall be referred to the Georgia environmental
protection division's underground injection control program for review and/or permitting -
ANS-Wastewater characteristics

based on anticipated peak daily sewage flow for facility - ANS-absorption field sizing

can be accomplished using pumps or siphons - ANS-dosing

commercial on-site sewage disposal systems shall adhere to all the standards established for
residential systems unless otherwise specifically addressed in the permit - ANS-general
information

commercial systems shall be designed using the flow schedule - ANS-Section J

concrete
fiberglass
plastic - ANS-Septic Tank Materials

concrete used for poured-in-place or pre-cast septic tanks shall have a minimum 28-day
compressive strength of 4000 pounds per square inch - ANS-concrete specifications

consideration must be given to the wastewater characteristics, desired discharge and total
dynamic head required for the system - ANS-When pumps are close to field lines

determined by adding the elevation difference between the lowest water level in the tank and
the elevation of the discharge outlet to the total friction losses that occur in the pressure piping
network - ANS-total dynamic head

dosing tanks shall have a water-tight access cover at least 24" in diameter extending to the
ground surface or no more than 12" below the ground surface - ANS-riser and lid systems

dosing tanks using pumps should be designed with a reserve capacity to allow adequate time
for repair in case of a pump failure
dosing tanks for siphons will not be required to have a reserve capacity - ANS-commercial
construction dosing tank requirement

electrical connections should not be located inside of the tank or riser as this is a corrosive
environment - ANS-electrical wiring

head pressure increases in the tank to a point that will force the effluent thru the siphon which is
a specially designed trap, creating suction in the discharge line that empties the contents of the
dosing tank to the level of the siphon bell and sniff hole - ANS-as dosing tank fills

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