Explore topic-wise MCQs in Environmental Engineering.

This section includes 18 Mcqs, each offering curated multiple-choice questions to sharpen your Environmental Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.

Which device is used to supply air for the agitation of sand grains during washing of filters?

A. Rate control device
B. Tube settlers
C. Air compressors
D. Flocculator
Answer» D. Flocculator
Discussion
2.

In which type of under drainage system of rapid sand filter, laterals are provided with strainers?

A. Perforated pipe system
B. Pipe and strainer system
C. Wheeler system
D. Wagner system
Answer» C. Wheeler system
Discussion
3.

The thickness of the base material of a rapid sand filter on which filter media are supported is __________

A. 45-60cm
B. 20-80cm
C. 30-75cm
D. 10-30cm
Answer» B. 20-80cm
Discussion
4.

The minimum depth of sand of a rapid sand filter is given by __________

A. Stokes formula
B. Clark’s formula
C. Hudson formula
D. Emden formula
Answer» D. Emden formula
Discussion
5.

Consider the following statement regarding the depth of sand of the rapid gravity filter?i. It should be checked against breakage of flocii. The sand depth should lie between 100-200cmiii. The floc should be attached through the sand bedWhich of the above statement is/are correct?

A. Only i
B. i, ii
C. ii, iii
D. Only ii
Answer» B. i, ii
Discussion
6.

What is the value of the uniformity coefficient in a rapid sand filter?

A. 1
B. 1.5
C. 2
D. 2.5
Answer» C. 2
Discussion
7.

The finer the suspended impurities to be removed ___________

A. Larger will be the sand size
B. Smaller will be the sand size
C. Smaller will be the surface area of sand grains
D. Narrow will be the sand depth of the bed
Answer» C. Smaller will be the surface area of sand grains
Discussion
8.

The depth of an enclosed tank of a rapid sand filter lies in the range of ______

A. 1-2m
B. 2.5-3.5m
C. 2-5m
D. 3-5m
Answer» C. 2-5m
Discussion
9.

THE_THICKNESS_OF_THE_BASE_MATERIAL_OF_A_RAPID_SAND_FILTER_ON_WHICH_FILTER_MEDIA_ARE_SUPPORTED_IS?$

A. 45-60cm
B. 20-80cm
C. 30-75cm
D. 10-30cm
Answer» B. 20-80cm
Discussion
10.

Which device is used to supply air for the agitation of sand grains during washing of filters?$

A. Rate control device
B. Tube settlers
C. Air compressors
D. Flocculator
Answer» D. Flocculator
Discussion
11.

In_which_type_of_under_drainage_system_of_rapid_sand_filter,_laterals_are_provided_with_strainers?$

A. Perforated pipe system
B. Pipe and strainer system
C. Wheeler system
D. Wagner system
Answer» C. Wheeler system
Discussion
12.

The minimum depth of sand of a rapid sand filter is given b?

A. Stokes formula
B. Clark’s formula
C. Hudson formula
D. Emden formula
Answer» D. Emden formula
Discussion
13.

Which of the following statement is wrong regarding Anthracite?

A. It requires less water
B. It is less inert to caustic solutions than sand
C. It is more costly per tonne than sand
D. It is used in industrial filters.
Answer» C. It is more costly per tonne than sand
Discussion
14.

What is the effective size of Anthracite when used as a filter material?

A. 0.1-0.2mm
B. 0.2-0.4mm
C. 0.4-0.6mm
D. 0.7-0.75mm
Answer» E.
Discussion
15.

What is the value of uniformity coefficient in a rapid sand filter?

A. 1
B. 1.5
C. 2
D. 2.5
Answer» C. 2
Discussion
16.

The finer the suspended impurities to be removed,

A. Larger will be the sand size
B. Smaller will be the sand size
C. Smaller will be the surface area of sand grains
D. Narrow will be the sand depth of the bed
Answer» C. Smaller will be the surface area of sand grains
Discussion
17.

The effective size of a rapid sand filter is ______

A. 0.45mm
B. 0.7mm
C. 0.8mm
D. 0.9mm
Answer» B. 0.7mm
Discussion
18.

The depth of an enclosed tank of a rapid sand filter lies in the range of ______

A. 1-2m
B. 2.5-3.5m
C. 2-5m
D. 3-5m
Answer» C. 2-5m
Discussion