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Water-and-waste-water Questions Set 22:

Quiz Mode

Bulking of sludge refers to having

F/M < 0.3/d

0.3/d F/M < 0.6/d

F/M = zero

F/M > 0.6/d

Solution:

The correct sequence of the steps involved in laying a sewer in a trench is:

1, 2, 3, 4

2, 3, 4, 1

4, 2, 3, 1

2, 3, 1, 4

Solution:

Which of the following treatment methods can reduce the salinity of water?

Flash mixing and sedimentation

Electrodialysis

Reverse osmosis

Freezing

Solution:

If tomato juice is having a pH of 4.1, the hydrogen ion concentration will be

10.94 x 10^-5mol/l

9.94 x 10^-5 mol/l

8.94 x 10^-5 mol/l

7.94 x 10^-5 mol/l

Solution:

The velocity that prevents the accumulation of sediment in the drain is known as the:

Storm velocity

Design velocity

Self-cleansing velocity

Clearing velocity

Solution:

Calculate the depth of a small filter which has 0.035 m depth and removes 90% of particles present in the water. The required particles removal efficiency is 92%.

0.050 m

0.045 m

0.035 m

0.038 m

Solution:

Total Kjeldahl nitrogen is a measure of the sum of organic nitrogen and ammonia nitrogen.

Total organic nitrogen

Total organic and ammonia nitrogen

Total ammonia nitrogen

Total inorganic and ammonia nitrogen

Solution:

A pipe of 250 m length with a diameter of 3 m is carrying 4 m³/s of water. Given: n = 0.014, Hazen-Williams coefficient C_H = 130, friction factor f = 0.013, and kinematic viscosity = 7.385 x 10^-7 m²/s. Find the head loss using the Hazen-Williams formula.

1.2 cm

1.4 cm

1.9 cm

2.2 cm

Solution:

A student began experiment for determination of 5-day, 20°C BOD on Monday. Since the 5th day fell on Saturday, the final DO readings were taken on next Monday. On calculation, BOD (i.e. 7 day, 20°C) was found to be 150 mg/L. What would be the 5-day, 20°C BOD in mg/L? Assume values of BOD rate constant (k) at standard temperature of 20°C as 0.23/ day (base e). (Answer should be rounded off to 1 decimal place)

Solution:

16 MLD of water is flowing through a 2.5 km long pipe of diameter 45 cm. The chlorine at the rate of 32 kg/d is applied at the entry of this pipe so that disinfected water is obtained at the exit. There is a proposal to increase the flow through this pipe to 22 MLD from 16 MLD. Assume the dilution coefficient, n = 1. The minimum amount of chlorine (in kg per day) to be applied to achieve the same degree of disinfection for the enhanced flow is

60.50

44.00

38.00

23.27

Water-and-waste-water Questions Set 22:

Bulking of sludge refers to having

Solution:

The correct sequence of the steps involved in laying a sewer in a trench is:

Solution:

Which of the following treatment methods can reduce the salinity of water?

Solution:

If tomato juice is having a pH of 4.1, the hydrogen ion concentration will be

Solution:

The velocity that prevents the accumulation of sediment in the drain is known as the:

Solution:

Calculate the depth of a small filter which has 0.035 m depth and removes 90% of particles present in the water. The required particles removal efficiency is 92%.

Solution:

Total Kjeldahl nitrogen is a measure of the sum of organic nitrogen and ammonia nitrogen.

Solution:

A pipe of 250 m length with a diameter of 3 m is carrying 4 m³/s of water. Given: n = 0.014, Hazen-Williams coefficient C_H = 130, friction factor f = 0.013, and kinematic viscosity = 7.385 x 10^-7 m²/s. Find the head loss using the Hazen-Williams formula.

Solution:

Solution:

Solution:

Related Question Sets:

Related Topics:

Water-and-waste-water Questions Set 22:

Bulking of sludge refers to having

Solution:

The correct sequence of the steps involved in laying a sewer in a trench is:

Solution:

Which of the following treatment methods can reduce the salinity of water?

Solution:

If tomato juice is having a pH of 4.1, the hydrogen ion concentration will be

Solution:

The velocity that prevents the accumulation of sediment in the drain is known as the:

Solution:

Calculate the depth of a small filter which has 0.035 m depth and removes 90% of particles present in the water. The required particles removal efficiency is 92%.

Solution:

Total Kjeldahl nitrogen is a measure of the sum of organic nitrogen and ammonia nitrogen.

Solution:

A pipe of 250 m length with a diameter of 3 m is carrying 4 m3/s of water. Given: n = 0.014, Hazen-Williams coefficient CH = 130, friction factor f = 0.013, and kinematic viscosity = 7.385 x 10-7 m2/s. Find the head loss using the Hazen-Williams formula.

Solution:

Solution:

Solution:

Related Question Sets:

Related Topics:

A pipe of 250 m length with a diameter of 3 m is carrying 4 m³/s of water. Given: n = 0.014, Hazen-Williams coefficient C_H = 130, friction factor f = 0.013, and kinematic viscosity = 7.385 x 10^-7 m²/s. Find the head loss using the Hazen-Williams formula.