On-Site Sewage Systems 2012 BCIN Exam Free Assessment

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A dwelling unit has 6 bedrooms in two story building. The first and second floor each has a finished area of 130 m2 and two bathroom group with direct flush valve. The unit has basement with finished area of 100 m2 and one bathtub. According to the Code requirements, the minimum size of the septic tank required in this case is:

a) 3600 L

b) 7200 L

c) 6350 L

d) 6400 L

A treatment unit produces effluent of 15 mg/l CBOD5 and 15 mg/l Suspended Solids. This unit is permitted for use in conjunction with:

a) filter bed

b) type A dispersal bed

c) shallow buried trench

d) type B dispersal bed

The Code requires all holding tanks used in residential dwellings to have a minimum 7 day holding capacity based on the total daily design sanitary sewage flow. According to the Code, the minimum capacity of a holding tank that services 20 seats, 24 hours restaurant is:

a) 8,000 L

b) 9,000 L

c) 28,000 L

d) 3,600 L

Type I leaching chamber is being used in the conjunction with absorption trench systems constructed as shallow buried trench, according to Article 8.7.3.2. of the Code, the trenches must be centered not less than

a) 1600 mm

b) 2400 mm

c) 2000 mm

d) 1500 mm

The total daily design sanitary sewage flow is 1800 L, and the T of underlying soil is 8 min, the area of contact between the base if the filter medium and the underlying soil is

a) 17 m2

b) 24 m2

c) 20 m2

d) 18 m2

A class 2 sewage system will be constructed in a soil that having percolation time of 10 min. The flow is by gravity and the trap size services the fixture discharged to the system is 2 in., according to the Code, the area of side walls of the system must not be less than

a) 9.2 m2

b) 8.5 m2

c) 6.25 m2

d) 4 m2

The soils in four lots were classified as shown below, which of these lots can accommodate an in ground absorption trench system :

a) GW

b) GP

c) SM

d) OH

The soils in four lots were classified as shown below, which of these lots can accommodate an in ground absorption trench system

a) Does not meet the Code requirements, a minimum clearance required is 30 m.

b) Does not meet the Code requirements, a minimum clearance required is 15 m.

c) Does not meet the Code requirements, a minimum clearance is 5 m.

d) meets the Code requirements

The total daily design sanitary sewage flow is 1500 L and T time is 20 min/cm, the minimum length of the absorption trench constructed as shallow buried trench is

a) 20 m

b) 30 m

c) 40 m

d) 100 m

When Q is 1500 L and the soil in site has T time of 24 min., a leaching bed fill with T time of 8 min. will be used to construct the absorption trench system using type II leaching chamber. The distance from the bottom of the trench to the underlying soil is 600 mm. According to the Code requirement, the length of the leaching chamber must not be less than

a) 60 m

b) 180 m

c) 120 m

d) 200 m

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On-Site Sewage Systems 2012 BCIN Exam Free Assessment