Questions with 100% Correct Verified
Detailed Answers latest update 2025
when shipped a steel tank is covered with a coating that is an
important part of the tanks Corrosion Prevention system. "holidays"
which show up in the coating at the installation site should? ---
correct answer ---should be touched up with a compatible coating
after proper surface preparation
touch up of holidays in a steel tank coatings at the installation site
should be done....... --- correct answer ---according to the
manufacturer's instructions
dielectric bushings are usually made of what? --- correct answer ---
non-metallic material
factors to consider in determining the size shape and depth of a tank
excavation include what? --- correct answer ---*the tank
manufacturers recommendations
*the requirements for compacting bedding and backfill as well as
stability of the soil
,*the depth of cover
AKA all of the above
in the absence of local requirements the recommended minimum
distance between a tank excavation and adjacent structures or
property lines is how many feet? --- correct answer ---5 feet
reinforcement of a steel underground tank may be required by the
tank manufacturer if --- correct answer ---the burial depth is greater
than the tank diameter
according to FRP tank manufacturers specifications the burial depth
for an FRP tank should not exceed how many feet? --- correct answer -
--7 feet
when installing a cathodically protected steel tank you should ---
correct answer ---make sure the excavation is free from material that
could cause damage to the coating
when installing dielectric bushings in a cathodically protected steel
tank prior to placing the tank in the excavation you should --- correct
,answer ---make sure that no electric current can pass through the
dielectric flanges or bushings
industry codes as well as the specifications of individual
manufacturers do not entirely agree as to the minimum space that
should be maintained between tanks and stalled in stable soil
conditions. what ranges of minimum spacing between tanks derived
from various industry codes and manufacture specifications which
range is most accurate. --- correct answer ---from 12 inches to 24
inches
acceptable bedding material for steel tanks include.... --- correct
answer ---clean washed well granulated gravel sand or Rock between
1/8 inch and 1/2 inch in size
pea gravel with a minimum diameter of 1/8 inch and a maximum
diameter of 3/4 inch
number 8 crushed stone
how should steel tanks should be lowered into the excavation ---
correct answer ---through the use of lifting lugs installed by the
, manufacture and use of lifting equipment of sufficient capacity to lift
and lower the tank
when installing a steel tank which has zinc anodes welded directly
onto the tank for cathodic protection you should --- correct answer ---
remove the plastic wrapping around the anodes prior to installation
if local authorities and tank manufacturers permit a sand slurry
mixture to be used for backfilling a tank what steps should be taken to
ensure that use of the slurry is proper? --- correct answer ---use only
Personnel trained in the sand slurry method by the tank manufacturer
and use the method only with the manufacturer's prior approval
in making a tank excavation if you discover that the specific call for
the burial depth of the steel tank to be greater than the tank diameter
what should you do? --- correct answer ---consult the tank
manufacturer to determine if reinforcements will be required
what is the minimum depth of bedding required for a pipe trench in
traffic areas? --- correct answer ---6 inches