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Water-and-waste-water Questions Set 11:

Quiz Mode

Which of the following is not a source of water?

i , iii

iii

ii, iii, iv

Solution:

How can pathogens be killed?

Nitrification

Chlorination

Oxidation

All of the above

Solution:

At what temperature is the 5-day biochemical oxygen demand (BOD) test conducted?

10°C

15°C

20°C

25°C

Solution:

If the period of incubation of sewage at 20°C is 12 days, the relative stability is

88.23%

90.41%

93.67%

95.50%

Solution:

In a fill and draw type sedimentation tank, what is the detention period provided?

6 hours

12 hours

18 hours

24 hours

Solution:

Which of the following statements regarding industrial water supply is/are correct?

1, 2 and 4

2, 3 and 4

3 and 4

3 only

Solution:

A _____________ houses the squatting pan or toilet seat and provides privacy and protection from the weather for the user.

Roof

Terrace

Shade

Shelter

Solution:

Sewage treatment in an oxidation pond is accomplished primarily by

Algal-bacterial symbiosis

Algal photosynthesis only

Bacterial oxidation only

chemical oxidation only

Solution:

A sedimentation tank is designed for an overflow rate of 15 m/day. If the dynamic viscosity of the liquid is 1.1 × 10^-2 cm²/s, and the specific gravity of the particles is 2.65, what is the diameter of the smallest particle that can be removed 100%?

0.0144 mm

0.0231 mm

0.0346 mm

0.042 mm

Solution:

An analysis for the determination of solids in the return sludge of the Activated Sludge Process was done as follows:

1. A crucible was dried to a constant mass of 62.485 g.

2. 75 mL of a well-mixed sample was taken in the crucible.

3. The crucible with the sample was dried to a constant mass of 65.020 g in a drying oven at 104°C.

4. The crucible with the dried sample was placed in a muffle furnace at 600°C for an hour. After cooling, the mass of the crucible with residues was 63.145 g.

The concentration of the organic fraction of solids present in the return sludge sample is

8800 mg/L

25000 mg/L

33800 mg/L

42600 mg/L

Water-and-waste-water Questions Set 11:

Which of the following is not a source of water?

Solution:

How can pathogens be killed?

Solution:

At what temperature is the 5-day biochemical oxygen demand (BOD) test conducted?

Solution:

If the period of incubation of sewage at 20°C is 12 days, the relative stability is

Solution:

In a fill and draw type sedimentation tank, what is the detention period provided?

Solution:

Which of the following statements regarding industrial water supply is/are correct?

Solution:

A _____________ houses the squatting pan or toilet seat and provides privacy and protection from the weather for the user.

Solution:

Sewage treatment in an oxidation pond is accomplished primarily by

Solution:

A sedimentation tank is designed for an overflow rate of 15 m/day. If the dynamic viscosity of the liquid is 1.1 × 10^-2 cm²/s, and the specific gravity of the particles is 2.65, what is the diameter of the smallest particle that can be removed 100%?

Solution:

Solution:

Related Question Sets:

Related Topics:

Water-and-waste-water Questions Set 11:

Which of the following is not a source of water?

Solution:

How can pathogens be killed?

Solution:

At what temperature is the 5-day biochemical oxygen demand (BOD) test conducted?

Solution:

If the period of incubation of sewage at 20°C is 12 days, the relative stability is

Solution:

In a fill and draw type sedimentation tank, what is the detention period provided?

Solution:

Which of the following statements regarding industrial water supply is/are correct?

Solution:

A _____________ houses the squatting pan or toilet seat and provides privacy and protection from the weather for the user.

Solution:

Sewage treatment in an oxidation pond is accomplished primarily by

Solution:

A sedimentation tank is designed for an overflow rate of 15 m/day. If the dynamic viscosity of the liquid is 1.1 × 10-2 cm2/s, and the specific gravity of the particles is 2.65, what is the diameter of the smallest particle that can be removed 100%?

Solution:

Solution:

Related Question Sets:

Related Topics:

A sedimentation tank is designed for an overflow rate of 15 m/day. If the dynamic viscosity of the liquid is 1.1 × 10^-2 cm²/s, and the specific gravity of the particles is 2.65, what is the diameter of the smallest particle that can be removed 100%?