Most suitable section of sewer in separate sewage system is________________?

Byadmin January 17, 2019June 4, 2021

Most suitable section of sewer in separate sewage system is________________?

A. rectangular section
B. circular section(Correct)
C. standard form of egg shaped sewer
D. modified egg shaped section

Environmental Engineering

The settling velocity of a particle in a sedimentation tank increases if_________________?

The settling velocity of a particle in a sedimentation tank increases if_________________?

A. particle size is decreased
B. the surface area of tank is increased
C. the depth of tank is decreased
D. none of the above

Read More The settling velocity of a particle in a sedimentation tank increases if_________________?
CHEMICAL ENGINEERING | Environmental Engineering

Iron & manganese present as pollutant in water can not be removed by

Question: Iron & manganese present as pollutant in water can not be removed by
[A].

ion exchange process.
[B].
oxidation followed by settling & filtration.
[C].
lime soda process or manganese zeolite process.
[D].
chlorination.

Answer: Option D

Explanation:

No answer description available for this question.

Read More Iron & manganese present as pollutant in water can not be removed by
Environmental Engineering

The velocity of flow of water in a sedimentation tank is about__________________?

The velocity of flow of water in a sedimentation tank is about__________________?

A. 5 to 10 cm/sec.
B. 15 to 30 cm/sec.
C. 15 to 30 cm/minute
D. 15 to 30 cm/hour

Read More The velocity of flow of water in a sedimentation tank is about__________________?
CHEMICAL ENGINEERING | Environmental Engineering

Bag filter design is predominantly dependent on gas temperature, as it affects the gas density & viscosity and the selection of filtering material. The pressure drop in a bag filter is

Question: Bag filter design is predominantly dependent on gas temperature, as it affects the gas density & viscosity and the selection of filtering material. The pressure drop in a bag filter is
[A].

inversely proportional to viscosity of gas.
[B].
proportional to the viscosity & density of the gas.
[C].
proportional to the pressure of the gas.
[D].
both (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

Read More Bag filter design is predominantly dependent on gas temperature, as it affects the gas density & viscosity and the selection of filtering material. The pressure drop in a bag filter is
CHEMICAL ENGINEERING | Environmental Engineering

‘Safe limit’ called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the

Question: ‘Safe limit’ called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the
[A].

industrial chimney exhaust.
[B].
automobiles exhaust.
[C].
photochemical reaction in polluted atmosphere.
[D].
burning of domestic fuel.

Answer: Option B

Explanation:

No answer description available for this question.

Read More ‘Safe limit’ called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the
CHEMICAL ENGINEERING | Environmental Engineering

Coal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal

Question: Coal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal
[A].

by chemical coagulation.
[B].
in sedimentation tanks equipped with mechanical scrapper.
[C].
in vacuum filter.
[D].
in clarifiers.

Answer: Option B

Explanation:

No answer description available for this question.

Read More Coal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal

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