OSSF DR TEST PRACTICE (Latest Update
) Questions with Correct
Answers {Grade A} 100% Verified
Which if the following is acceptable for the line from the building to the treatment tank?
- correct answer cast iron, SDR 26 plastic pipe, and Schedule 40 plastic pipe
Most of the settable solids and scum that enter a properly designed septic tank will be
- correct answer removed in the first compartment
Which of the following should a house sewer have? - correct answer A two way
sanitary clean-out, minimum 1/8 inch per foot fall, minimum diameter of 3 inches
Which of the following applies if effluent is to be pumped? - correct answer A high-
water alarm must be provided, the pump must be installed in a separate chamber, a
check valve should be in line if the disposal area is upgrade
T/F: Septic tanks may be 1.5 inch-thick steel - correct answer F
T/F: Septic tanks may be reinforced fiberglass - correct answer T
,T/F: Two single-compartment septic tanks in series are allowed - correct answer T
How many spray heads would be needed for an older four bedroom home without
water-saving devices in Beaumont, Texas (note: extreme southeast Texas) to meet
minimum requirements for spray are is rotary heads sent out a spray 30 feet? -
correct answer 4
T/F: A two-compartment septic tank is allowed - correct answer T
T/F: One single-compartment septic tank that is sized properly is allowed. - correct
answer F
T/F: Tees are allowed for inlet and outlet devices - correct answer T
T/F: An inlet line should be at least 3 inches above the liquid level. - correct answer T
, T/F: A leakage from the tank or joints of 1.6 gallons/hour is permissible - correct
answer F
T/F: A 12-inch port (minimum) must be provided in the top of the tank - correct answer
T
T/F: The first compartment should be smaller than the second compartment - correct
answer F....Should be 1/2 to 2/3s the second
T/F: Outlet Tee should extend to the bottom of the tank - correct answer F
T/F: The tank must be level - correct answer T
T/F: A minimum 4-inch-thick sand, sandy loam, clay loam, or pea gravel pad is
required under prefabricated tanks - correct answer T
The standard drainfield depth in East and Central Texas is limited to - correct answer
18 inches minimum and 36 inches maximum
) Questions with Correct
Answers {Grade A} 100% Verified
Which if the following is acceptable for the line from the building to the treatment tank?
- correct answer cast iron, SDR 26 plastic pipe, and Schedule 40 plastic pipe
Most of the settable solids and scum that enter a properly designed septic tank will be
- correct answer removed in the first compartment
Which of the following should a house sewer have? - correct answer A two way
sanitary clean-out, minimum 1/8 inch per foot fall, minimum diameter of 3 inches
Which of the following applies if effluent is to be pumped? - correct answer A high-
water alarm must be provided, the pump must be installed in a separate chamber, a
check valve should be in line if the disposal area is upgrade
T/F: Septic tanks may be 1.5 inch-thick steel - correct answer F
T/F: Septic tanks may be reinforced fiberglass - correct answer T
,T/F: Two single-compartment septic tanks in series are allowed - correct answer T
How many spray heads would be needed for an older four bedroom home without
water-saving devices in Beaumont, Texas (note: extreme southeast Texas) to meet
minimum requirements for spray are is rotary heads sent out a spray 30 feet? -
correct answer 4
T/F: A two-compartment septic tank is allowed - correct answer T
T/F: One single-compartment septic tank that is sized properly is allowed. - correct
answer F
T/F: Tees are allowed for inlet and outlet devices - correct answer T
T/F: An inlet line should be at least 3 inches above the liquid level. - correct answer T
, T/F: A leakage from the tank or joints of 1.6 gallons/hour is permissible - correct
answer F
T/F: A 12-inch port (minimum) must be provided in the top of the tank - correct answer
T
T/F: The first compartment should be smaller than the second compartment - correct
answer F....Should be 1/2 to 2/3s the second
T/F: Outlet Tee should extend to the bottom of the tank - correct answer F
T/F: The tank must be level - correct answer T
T/F: A minimum 4-inch-thick sand, sandy loam, clay loam, or pea gravel pad is
required under prefabricated tanks - correct answer T
The standard drainfield depth in East and Central Texas is limited to - correct answer
18 inches minimum and 36 inches maximum
