Josef Lorenz Del
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Quiz on Master Plumber - Private Sewage Disposal Systems, created by Josef Lorenz Del on 13/07/2016.

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Josef Lorenz Del
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Master Plumber - Private Sewage Disposal Systems

Question 1 of 18

1

The type of system shall be determined on the basis of ______.

Select one of the following:

  • Location

  • Soil porosity

  • Ground water level

  • All of the above

Explanation

Question 2 of 18

1

The capacity of any one septic tank and its drainage system shall be limited by _____.

Select one of the following:

  • Location

  • Soil porosity

  • Soil structure classification

  • Ground water level

Explanation

Question 3 of 18

1

Septic tanks shall have _____.

Select one of the following:

  • A maximum of two compartments

  • Atleast three compartments

  • A minimum of two compartments

  • Atleast one compartment

Explanation

Question 4 of 18

1

The inlet compartment of any septic tank shall be _____.

Select one of the following:

  • 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.

Explanation

Question 5 of 18

1

Minimum dimensions of septic tank

Select one of the following:

  • 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

Explanation

Question 6 of 18

1

Liquid depth shall be _____.

Select one of the following:

  • 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

Explanation

Question 7 of 18

1

The secondary compartment of any septic tank shall have a _____.

Select one of the following:

  • 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.

Explanation

Question 8 of 18

1

In septic tanks having over 6cu.m. capacity, the secondary compartment may _____.

Select one of the following:

  • 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

Explanation

Question 9 of 18

1

Access to each septic tank shall be provided by already two (2) manholes _____ in minimum dimension or by an equivalent removable cover slab.

Select one of the following:

  • 406mm or 16in

  • 457mm or 18in

  • 508mm or 20in

  • 559mm or 22in

Explanation

Question 10 of 18

1

Wherever a first compartment exceeds _____ in length, an additional manhole shall be provided over the baffle wall.

Select one of the following:

  • 3.1m or 10ft

  • 3.7m or 12ft

  • 4.3m or 14ft

  • 4.9m or 16ft

Explanation

Question 11 of 18

1

The inlet and outlet pipe or baffle wall shall extend ______ the water surface.

Select one of the following:

  • 4in above and atleast 12in below

  • 3in above and atleast 10in below

  • 5in above and atleast 14in below

  • 6in above and atleast 16in below

Explanation

Question 12 of 18

1

The invert of the inlet pipe small be at a level _____ above the invert of the outlet pipe.

Select one of the following:

  • Not less than 2in

  • Not less than 4in

  • Not more than 2in

  • Not more than 4in

Explanation

Question 13 of 18

1

The side walls shall extend atleast _____ above the liquid depth.

Select one of the following:

  • 228.6mm or 9in

  • 177.8mm or 7in

  • 254mm or 10in

  • 203.2mm or 8in

Explanation

Question 14 of 18

1

The cover of the septic tank shall be atleast _____ above the back vent opening.

Select one of the following:

  • 50.8mm or 2in

  • 25.4mm or 1in

  • 76.2mm or 3in

  • 101.6mm or 4in

Explanation

Question 15 of 18

1

All septic tank covers shall be capable of supporting an earth load of nor less than _____ when the maximum coverage does not exceed _____.

Select one of the following:

  • 14.4kPa ; 9m

  • 20.7kPa ; 12m

  • 6.9kPa ; 6m

  • 27.6kPa ; 15m

Explanation

Question 16 of 18

1

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.

Select one of the following:

  • 101.6mm or 4in

  • 76.2mm or 3in

  • 127mm or 5in

  • 152.4mm or 6in

Explanation

Question 17 of 18

1

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.

Select one of the following:

  • 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)

Explanation

Question 18 of 18

1

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.

Select one of the following:

  • 3/4in to 2 1/2in

  • 1in to 2 1/2in

  • 1/2in to 3in

  • 3/4in to 3in

Explanation

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