The type of system shall be determined on the basis of ______.
Location
Soil porosity
Ground water level
All of the above
The capacity of any one septic tank and its drainage system shall be limited by _____.
Soil structure classification
Septic tanks shall have _____.
A maximum of two compartments
Atleast three compartments
A minimum of two compartments
Atleast one compartment
The inlet compartment of any septic tank shall be _____.
Not less than two-thirds (2/3) of the total capacity of the tank, nor less than 2cu.m.
Less than two-thirds (1/3) of the total capacity of the tank, nor less than 1cu.m.
Less than two-thirds (2/3) of the total capacity of the tank, nor less than 2cu.m.
Not less than two-thirds (1/3) of the total capacity of the tank, nor less than 1cu.m.
Minimum dimensions of septic tank
Atleast 1.2m in width and 1.5m in length
Atleast 0.6m in width and 1.2m in length
Atleast 0.9m in width and 1.5m in length
Atleast 1.2m in width and 1.8m in length
Liquid depth shall be _____.
Not less than 0.9m nor more than 1.8m
Not less than 0.6m nor more than 1.8m
Not less than 0.6m nor more than 1.5m
Not less than 0.9m nor more than 1.5m
The secondary compartment of any septic tank shall have a _____.
A maximum capacity of two-thirds (2/3) of the total capacity of such tank and a minimum capacity of 2cu.m.
A minimum capacity of one-third (1/3) of the total capacity of such tank and a maximum capacity of 1cu.m.
A minimum capacity of two-thirds (2/3) of the total capacity of such tank and a maximum capacity of 2cu.m
A maximum capacity of one-third (1/3) of the total capacity of such tank and a minimum capacity of 1cu.m.
In septic tanks having over 6cu.m. capacity, the secondary compartment may _____.
May not be less than 0.9m in length
May not be less than 1.2m in length
May not be less than 1.5m in length
May not be less than 1.8m in length
Access to each septic tank shall be provided by already two (2) manholes _____ in minimum dimension or by an equivalent removable cover slab.
406mm or 16in
457mm or 18in
508mm or 20in
559mm or 22in
Wherever a first compartment exceeds _____ in length, an additional manhole shall be provided over the baffle wall.
3.1m or 10ft
3.7m or 12ft
4.3m or 14ft
4.9m or 16ft
The inlet and outlet pipe or baffle wall shall extend ______ the water surface.
4in above and atleast 12in below
3in above and atleast 10in below
5in above and atleast 14in below
6in above and atleast 16in below
The invert of the inlet pipe small be at a level _____ above the invert of the outlet pipe.
Not less than 2in
Not less than 4in
Not more than 2in
Not more than 4in
The side walls shall extend atleast _____ above the liquid depth.
228.6mm or 9in
177.8mm or 7in
254mm or 10in
203.2mm or 8in
The cover of the septic tank shall be atleast _____ above the back vent opening.
50.8mm or 2in
25.4mm or 1in
76.2mm or 3in
101.6mm or 4in
All septic tank covers shall be capable of supporting an earth load of nor less than _____ when the maximum coverage does not exceed _____.
14.4kPa ; 9m
20.7kPa ; 12m
6.9kPa ; 6m
27.6kPa ; 15m
All concrete septic tanks shall be protected from corrosion by coating with an approved bituminous coating or by other acceptable means. The coating shall extend to atleast _____ below the water line and shall cover all the internal area above that point.
127mm or 5in
152.4mm or 6in
The minimum wall thickness of any steel tank shall be _____ and each such tank shall be protected from corrosion, both externally and internally, by an approved bituminous coating or by other acceptable means.
No. 12 U.S. gauge (.109) (2.8mm)
No. 11 U.S. gauge (.125) (3.2mm)
No. 13 U.S. gauge (.094) (2.4mm)
No. 14 U.S. gauge (.073) (2.0mm)
Clean stone, gravel, slag or similar filter material varying in size from _____ shall be placed in the trench to the depth and grade of required constructing disposal fields.
3/4in to 2 1/2in
1in to 2 1/2in
1/2in to 3in
3/4in to 3in
