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Water-and-waste-water Questions Set 29:

Quiz Mode

Which formula gives the minimum depth of sand in a rapid sand filter?

Stokes formula

Hudson formula

Emden formula

Clark's formula

Solution:

Which of the following is not used for removing permanent hardness in water?

Adding lime

Demineralization

Zeolite process

Lime soda process

Solution:

In a water treatment plant with a discharge of 632 m³/hr, what is the plan area needed to remove 95% of particles with a settling velocity of 0.12 cm/sec?

146.296

120

138.981

130.981

Solution:

Waste water can be considered as fully biodegradable if the ratio of Biochemical Oxygen Demand (BOD) to Chemical Oxygen Demand (COD) lies between which values given below?

0.92 and 1.0

0.68 and 0.92

1.0 and 1.5

0.5 and 0.68

Solution:

If organic sources of carcinogenic compounds in water persist even after chlorination, what is the correct sequence of the following water treatment processes?

4-5-3-2-6 and 1

1-2-3-4-5 and 6

4-2-3-1-5 and 6

1-2-3-4-5 and 6

Solution:

According to the National Board of Fire Underwriters formula, what is the fire demand in liters per minute for a city with a population of 300,000?

66405 liters per minute

66410 liters per minute

66400 liters per minute

66395 liters per minute

Solution:

Effluent from an industry 'A' has a pH of 4.2. The effluent from another industry 'B' has double the hydroxyl (OH^-) ion concentration than the effluent from industry 'A'. pH of effluent from the industry 'B' will be______. Answer round off to 1 decimal place

Solution:

Match List-I (Parameters) with List-II (Units) and select the correct answer using the code given below the lists:

List-I

A. Turbidity

B. Pathogen

C. Odour

D. Colour

List-II

1. TON

2. TCU

3. JTU

4. MPN

A - 2, B - 1, C - 4, D - 3

A - 3, B - 1, C - 4, D - 2

A - 2, B - 4, C - 1, D - 3

A - 3, B - 4, C - 1, D - 2

Solution:

A town is required to treat 4.2 m³/min of raw water for daily domestic supply. Flocculating particles are to be produced by chemical coagulation.
A column analysis indicated that an overflow rate of 0.2 mm/s will produce satisfactory particle removal in a settling basin at a depth of 3.5 m. The required surface area (in m²) for settling is

210

350

1728

21000

Solution:

Consider the following statements about sedimentation tanks and coagulation:

1. In a continuous flow type sedimentation tank, the particles to be removed should have a settling velocity greater than the surface loading rate.

2. In a continuous flow type sedimentation tank, the particles which are settling move vertically down to the bottom.

3. Coagulant added to water containing alkalinity results in the formation of its hydroxide compound.

Which of these statements are correct?

Statement 1 only

Statements 1 and 2

Statements 2 and 3

Statements 1 and 3

Water-and-waste-water Questions Set 29:

Which formula gives the minimum depth of sand in a rapid sand filter?

Solution:

Which of the following is not used for removing permanent hardness in water?

Solution:

In a water treatment plant with a discharge of 632 m³/hr, what is the plan area needed to remove 95% of particles with a settling velocity of 0.12 cm/sec?

Solution:

Waste water can be considered as fully biodegradable if the ratio of Biochemical Oxygen Demand (BOD) to Chemical Oxygen Demand (COD) lies between which values given below?

Solution:

If organic sources of carcinogenic compounds in water persist even after chlorination, what is the correct sequence of the following water treatment processes?

Solution:

According to the National Board of Fire Underwriters formula, what is the fire demand in liters per minute for a city with a population of 300,000?

Solution:

Effluent from an industry 'A' has a pH of 4.2. The effluent from another industry 'B' has double the hydroxyl (OH^-) ion concentration than the effluent from industry 'A'. pH of effluent from the industry 'B' will be______. Answer round off to 1 decimal place

Solution:

Match List-I (Parameters) with List-II (Units) and select the correct answer using the code given below the lists:

List-I

A. Turbidity

B. Pathogen

C. Odour

D. Colour

List-II

1. TON

2. TCU

3. JTU

4. MPN

Solution:

Solution:

Solution:

Related Question Sets:

Related Topics:

Water-and-waste-water Questions Set 29:

Which formula gives the minimum depth of sand in a rapid sand filter?

Solution:

Which of the following is not used for removing permanent hardness in water?

Solution:

In a water treatment plant with a discharge of 632 m³/hr, what is the plan area needed to remove 95% of particles with a settling velocity of 0.12 cm/sec?

Solution:

Waste water can be considered as fully biodegradable if the ratio of Biochemical Oxygen Demand (BOD) to Chemical Oxygen Demand (COD) lies between which values given below?

Solution:

If organic sources of carcinogenic compounds in water persist even after chlorination, what is the correct sequence of the following water treatment processes?

Solution:

According to the National Board of Fire Underwriters formula, what is the fire demand in liters per minute for a city with a population of 300,000?

Solution:

Effluent from an industry 'A' has a pH of 4.2. The effluent from another industry 'B' has double the hydroxyl (OH-) ion concentration than the effluent from industry 'A'. pH of effluent from the industry 'B' will be______. Answer round off to 1 decimal place

Solution:

Match List-I (Parameters) with List-II (Units) and select the correct answer using the code given below the lists: List-I A. Turbidity B. Pathogen C. Odour D. Colour List-II 1. TON 2. TCU 3. JTU 4. MPN

Solution:

Solution:

Solution:

Related Question Sets:

Related Topics:

Effluent from an industry 'A' has a pH of 4.2. The effluent from another industry 'B' has double the hydroxyl (OH^-) ion concentration than the effluent from industry 'A'. pH of effluent from the industry 'B' will be______. Answer round off to 1 decimal place

Match List-I (Parameters) with List-II (Units) and select the correct answer using the code given below the lists:

List-I

A. Turbidity

B. Pathogen

C. Odour

D. Colour

List-II

1. TON

2. TCU

3. JTU

4. MPN