CSLB CONCRETE COMPREHENSIVE EXAM SCRIPT COMPLETE QUESTIONS VERIFIED
SOLUTIONS
Question:
In an unlined ET system, wastewater is disposed of by which of the following?
Answer:
evaporation, transpiration, soil absorption
Question:
A gravelless pipe drainfield.
Answer:
can be backfilled with Class Ib, II, or III soil
Question:
A leaching chamber system.
Answer:
requires 25% less absorptive area than a standard system for new construction
Question:
Aerobic treatment units.
Answer:
utilize aerobic bacteria and oxygen to break down complex organics and produce carbon dioxide
Question:
,To determine if a proprietary aerobic treatment unit is appropriate for use with surface application
disposal it must.
Answer:
be on the TCEQ's most recently approved list
Question:
To determine the minimum size of aerobic treatment unit needed for a particular home, one must
know.
Answer:
number of bedrooms and square feet in the home and refer to TCEQ Table II
Question:
Which of the following is a likely cause of a "rotten egg" odor from an aerobic treatment plant?
Answer:
Mechanical aerator failure, hydraulic overload caused by leaking toilet
Question:
Which of the following is a way to evaluate an aerobic treatment plant for excessive solids and need
for wasting?
Answer:
30-minute settling test
Question:
Which of the following is true of standard intermittent sand filter?
Answer:
provides secondary wastewater treatment, has a maximum surface loading rate of 1.2 gal/day/sqft,
requires at least 24 inches of filter media which meets definite specifications (ASTM C-33)
,Question:
When would an intermittent sand filter with disinfection system be selected over a properly
designed and installed septic tank system?
Answer:
For a standard drainfield in class Ia soil
Question:
Trickling filters and wetlands.
Answer:
are secondary treatment processes
Question:
Which of the following considerations should receive the greatest emphasis in selecting a type of
OSSF disposal option?
Answer:
soil and site conditions
Question:
On a West Texas site with 16 inches of Class Ia soil over fractured rock, suitable OSSFs would
include.
Answer:
lined ET or mound systems
Question:
What are the minimum soil requirements for leaching chambers or gravelless pipe systems
following a septic tank?
Answer:
, The same as for a standard absorptive drainfield, 2 feet of well-drained Class Ib, II, or III soil below
the field bottom
Question:
OSSF surface application always requires.
Answer:
at least secondary treatment and disinfection
Question:
Surface application is often selected over other OSSF disposal options because of.
Answer:
clay soils and/or seasonal groundwater problems
Question:
What must be known to determine the size of spray area required for an OSSF spray irrigation
system?
Answer:
Rate of irrigation (Ri) allowed in that area and (Q) in gal/day
Question:
Systems that routinely require a pump tank include.
Answer:
surface and drip irrigation and sand filters
Question:
The setback from a public water well for an aerobic plant is.
Answer:
SOLUTIONS
Question:
In an unlined ET system, wastewater is disposed of by which of the following?
Answer:
evaporation, transpiration, soil absorption
Question:
A gravelless pipe drainfield.
Answer:
can be backfilled with Class Ib, II, or III soil
Question:
A leaching chamber system.
Answer:
requires 25% less absorptive area than a standard system for new construction
Question:
Aerobic treatment units.
Answer:
utilize aerobic bacteria and oxygen to break down complex organics and produce carbon dioxide
Question:
,To determine if a proprietary aerobic treatment unit is appropriate for use with surface application
disposal it must.
Answer:
be on the TCEQ's most recently approved list
Question:
To determine the minimum size of aerobic treatment unit needed for a particular home, one must
know.
Answer:
number of bedrooms and square feet in the home and refer to TCEQ Table II
Question:
Which of the following is a likely cause of a "rotten egg" odor from an aerobic treatment plant?
Answer:
Mechanical aerator failure, hydraulic overload caused by leaking toilet
Question:
Which of the following is a way to evaluate an aerobic treatment plant for excessive solids and need
for wasting?
Answer:
30-minute settling test
Question:
Which of the following is true of standard intermittent sand filter?
Answer:
provides secondary wastewater treatment, has a maximum surface loading rate of 1.2 gal/day/sqft,
requires at least 24 inches of filter media which meets definite specifications (ASTM C-33)
,Question:
When would an intermittent sand filter with disinfection system be selected over a properly
designed and installed septic tank system?
Answer:
For a standard drainfield in class Ia soil
Question:
Trickling filters and wetlands.
Answer:
are secondary treatment processes
Question:
Which of the following considerations should receive the greatest emphasis in selecting a type of
OSSF disposal option?
Answer:
soil and site conditions
Question:
On a West Texas site with 16 inches of Class Ia soil over fractured rock, suitable OSSFs would
include.
Answer:
lined ET or mound systems
Question:
What are the minimum soil requirements for leaching chambers or gravelless pipe systems
following a septic tank?
Answer:
, The same as for a standard absorptive drainfield, 2 feet of well-drained Class Ib, II, or III soil below
the field bottom
Question:
OSSF surface application always requires.
Answer:
at least secondary treatment and disinfection
Question:
Surface application is often selected over other OSSF disposal options because of.
Answer:
clay soils and/or seasonal groundwater problems
Question:
What must be known to determine the size of spray area required for an OSSF spray irrigation
system?
Answer:
Rate of irrigation (Ri) allowed in that area and (Q) in gal/day
Question:
Systems that routinely require a pump tank include.
Answer:
surface and drip irrigation and sand filters
Question:
The setback from a public water well for an aerobic plant is.
Answer:
