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Questions and CORRECT Answers
What is the 2 commandments - CORRECT ANSWER - Must be water tight and structurally
sound
What is a holding tank - CORRECT ANSWER - Water tight receptacles used to temporarily
store sewage.
What is a septic tank? - CORRECT ANSWER - A water tight receptacle that receives sewage
from a building.
What is a dosing tank? - CORRECT ANSWER - Used to convey effluent from one
component such as a septic tank to another.
what is a d box? - CORRECT ANSWER - Used to carry effluent from one system component
to another. Typically have one inlet and multiple outlets and used to connect to individual lines in
the system
what is a grease trap? - CORRECT ANSWER - Like a septic tank except they are commonly
associated with commercial food establishments. The sewage from food establishments is
typically much stronger in terms of organic content. Used to intercept grease and other food
products.
What are the 2 types of aggregates - CORRECT ANSWER - Fine aggregates- sand
course aggregates- rock
What is the diameter of #67 and #57 rock - CORRECT ANSWER - 57-3/4 67/ 1 inch
, What is a aggregate with with no variation in size - CORRECT ANSWER - Poorly graded
What is aggregates with little variation in size - CORRECT ANSWER - Gap graded
aggregates
What is aggregates with good variation in aggregate size - CORRECT ANSWER - Well
graded aggregates
What are the 4 types of vibrators - CORRECT ANSWER - Hydraulic phumatic turbine and
electric
What are the 2 different types of vibrations - CORRECT ANSWER - Internal and external
What are the ways to apply form release - CORRECT ANSWER - Spraying, whipping,
dipping, fogging, painting/swabbing
What is spraying? - CORRECT ANSWER - The most common use to apply form release. A
high pressure tank that contains form release agent and is misted out of a nozzle.
What are the 2 types of form releases - CORRECT ANSWER - Barrier release agents and
reactive release agents
How do you measure slump? - CORRECT ANSWER - With a slump cone that is filled up 1/3
of the way then rodded 25 time and repeating that process till the cone is 3/3 of the way full then
when taking the cone off is measured from the cone to the center point of the concrete.
What is type 1 cement - CORRECT ANSWER - Regular Portland cement good for all uses
and good for general construction.
What is type 2 cement - CORRECT ANSWER - Sets at a slower rate but is moderate to
sulfate attack.