EGR 1400 PRACTICE TEST 2026 QUESTIONS
WITH ANSWERS GRADED A+
▶ A gravelless pipe drainfield? Answer:can be backfilled with Class Ib, II,
or III soil
▶ A leaching chamber system? Answer:requires 25% less absorptive area
than a standard system for new construction
▶ Aerobic treatment units? Answer:utilize aerobic bacteria and oxygen to
break down complex organics and produce carbon dioxide
▶ 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
▶ 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
▶ 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
▶ 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
▶ 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)
▶ 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
WITH ANSWERS GRADED A+
▶ A gravelless pipe drainfield? Answer:can be backfilled with Class Ib, II,
or III soil
▶ A leaching chamber system? Answer:requires 25% less absorptive area
than a standard system for new construction
▶ Aerobic treatment units? Answer:utilize aerobic bacteria and oxygen to
break down complex organics and produce carbon dioxide
▶ 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
▶ 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
▶ 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
▶ 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
▶ 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)
▶ 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
