Commercial Septic System Installer Questions, Answers & Proven Methods

Commercial Septic System Installer
Exam

The sizing of grease traps should take into consideration the

___________________ and the ___________________________________. - ✔

✔ type of facility served and the


estimated daily sewage flow.


Grease traps may be constructed of ___________materials used for

conventional septic tanks. - ✔ ✔ any


It is recommended that grease traps be cleaned when ___________ percent of

their grease retention capacity is reached. - ✔ ✔ 75%


Commercial on-site sewage disposal systems shall adhere to all the standards

established for residential systems unless

__________________________________. - ✔ ✔ specifically addressed in the

permit.

, Commercial systems shall be sized according to the

______________________________________ for the facility to be served. - ✔

✔ anticipated daily sewage flow


For residential type facilities both single and multifamily, _________________

per bedroom will be used to estimate the number of gallons per day sewage

flow. - ✔ ✔ 150 gallons per bedroom


Where garbage grinders are used increase tank capacity by

__________________% - ✔ ✔ 50%


All solid pipe used in the installation of on-site sewage disposal systems shall be

schedule _________________ or equivalent. (cast Iron shall be considered to

meet the equivalency standard.) - ✔ ✔ 40 PVC


All wiring and electrical components for systems requiring electrical

components should for systems requiring electrical components should meet

the standards set forth in the ____________________________________. - ✔

✔ National Electrical Code


Trenches that exceed sixty inches in depth should have ___________ stabilized

with appropriate shoring devices. - ✔ ✔ Walls