Question 1

Which of the following statement is correct?

Accepted Answer

A) Ignition loss of filter should not exceed 3% 
B) Wearing loss of filter sand should not exceed 5% 
C) The range of CU for the slow sand filter is 3-5 
D) The range of CU for the rapid sand filter is 3-5 
A) Ignition loss of filter should not exceed 3% 
B) Wearing loss of filter sand should not exceed 5% 
C) The range of CU for the slow sand filter is 3-5 
D) The range of CU for the rapid sand filter is 3-5 C

Question 2

The uniformity characteristics of sand expressed in terms of __________

Accepted Answer

A) Effective size 
B) Effective size and uniformity coefficient 
C) Uniformity coefficient 
D) Mean velocity 
A) Effective size 
B) Effective size and uniformity coefficient 
C) Uniformity coefficient 
D) Mean velocity B

Question 3

The chemical formula of Permutit is ____________

Accepted Answer

A) SiOAl2O3Na2O 
B) SiO2Al2O3Na2O 
C) SiO2Al2O3NaO 
D) SiO3Al2O3Na2O 
A) SiOAl2O3Na2O 
B) SiO2Al2O3Na2O 
C) SiO2Al2O3NaO 
D) SiO3Al2O3Na2O B

Question 4

____ represents the size of sand particle such that 10% of particles are finer than this size.

Accepted Answer

A) D0.1 
B) D1 
C) D10 
D) D100 
A) D0.1 
B) D1 
C) D10 
D) D100

Question 5

If the precipitate formed is soft, loose and slimy, these are __________ and if the precipitate is hard and adhering on the inner wall, it is called _____________

Accepted Answer

A) Sludges, scale 
B) Scale, sludges 
C) Sludges, rodent 
D) Scale, rodent 
A) Sludges, scale 
B) Scale, sludges 
C) Sludges, rodent 
D) Scale, rodent

Question 6

Natural zeolite is mainly processed from ____________

Accepted Answer

A) White sand 
B) Green sand 
C) Grey sand 
D) Red sand 
A) White sand 
B) Green sand 
C) Grey sand 
D) Red sand

Question 7

In which process of water softening, the chemicals are added to remove hardness from water?

Accepted Answer

A) Lime soda process 
B) Zeolite process 
C) Boiling 
D) Demineralization process 
A) Lime soda process 
B) Zeolite process 
C) Boiling 
D) Demineralization process

Question 8

In which process of water softening, ion exchange phenomenon takes place?

Accepted Answer

A) Lime soda process 
B) Zeolite process 
C) Boiling 
D) Demineralization process 
A) Lime soda process 
B) Zeolite process 
C) Boiling 
D) Demineralization process

Question 9

What is CU in the expression CU= D60/D10 where D60 and D10 are the sizes of particle such that 60% and 10% of the particles are finer than these sizes respectively?

Accepted Answer

A) Coefficient of compaction 
B) Coefficient of consolidation 
C) Uniformity coefficient 
D) Effective size 
A) Coefficient of compaction 
B) Coefficient of consolidation 
C) Uniformity coefficient 
D) Effective size

Question 10

Which of the following should not be a composition of boiler-feed water?

Accepted Answer

A) Hardness should be below 0.2ppm 
B) Its caustic alkalinity should lie between 0.15 to 0.45 ppm 
C) Its soda alkalinity should be 0.45-1 ppm 
D) Its caustic alkalinity should be 1.5-2 ppm 
A) Hardness should be below 0.2ppm 
B) Its caustic alkalinity should lie between 0.15 to 0.45 ppm 
C) Its soda alkalinity should be 0.45-1 ppm 
D) Its caustic alkalinity should be 1.5-2 ppm

Question 11

Permutit has an exchange value of ________ grams of hardness per m3 of zeolite.

Accepted Answer

A) 10,000 
B) 20,000-30,000 
C) 35,000-40,000 
D) 40,000-50,000 
A) 10,000 
B) 20,000-30,000 
C) 35,000-40,000 
D) 40,000-50,000

Question 12

The value of uniformity coefficient for uniformly graded sand is ______

Accepted Answer

A) 0 
B) 1 
C) 10 
D) 100 
A) 0 
B) 1 
C) 10 
D) 100

Question 13

The effective size of sand of the slow sand filter is __________

Accepted Answer

A) 0.1-0.2mm 
B) 0.2-0.3mm 
C) 0.4-0.7mm 
D) 1-2mm 
A) 0.1-0.2mm 
B) 0.2-0.3mm 
C) 0.4-0.7mm 
D) 1-2mm

Question 14

The thickness of the layers of filter sand of zeolite softener is ____________

Accepted Answer

A) 20cm 
B) 30cm 
C) 40cm 
D) 100cm 
A) 20cm 
B) 30cm 
C) 40cm 
D) 100cm

Question 15

Which of the following is not commonly used as a filter material in the treatment of water?

Accepted Answer

A) Sand 
B) Anthracite 
C) Crushed rock 
D) Garnet sand 
A) Sand 
B) Anthracite 
C) Crushed rock 
D) Garnet sand

Question 16

The value of specific gravity for Garnet sand is ____

Accepted Answer

A) 2.1 
B) 3.6 
C) 4.2 
D) 5.1 
A) 2.1 
B) 3.6 
C) 4.2 
D) 5.1

Question 17

The color of the natural zeolite is ____________

Accepted Answer

A) Green 
B) Grey 
C) Black 
D) Blue 
A) Green 
B) Grey 
C) Black 
D) Blue

Question 18

Water is mainly used in boilers for the generation of ________________

Accepted Answer

A) Power 
B) Electricity 
C) Steam 
D) Current 
A) Power 
B) Electricity 
C) Steam 
D) Current

Question 19

Zeolites are complex compound of ____________

Accepted Answer

A) Aluminium and lime 
B) Silica and soda 
C) Aluminium, silica and soda 
D) Lime and soda 
A) Aluminium and lime 
B) Silica and soda 
C) Aluminium, silica and soda 
D) Lime and soda

Question 20

Which of the following is a disadvantage of the zeolite process?

Accepted Answer

A) No sludge is formed 
B) The process is almost automatic 
C) Suspended impurities get deposited around the zeolite particles 
D) Zero hardness can be occurred 
A) No sludge is formed 
B) The process is almost automatic 
C) Suspended impurities get deposited around the zeolite particles 
D) Zero hardness can be occurred

Which of the following statement is correct?

The uniformity characteristics of sand expressed in terms of __________

The chemical formula of Permutit is ____________

____ represents the size of sand particle such that 10% of particles are finer than this size.

If the precipitate formed is soft, loose and slimy, these are and if the precipitate is hard and adhering on the inner wall, it is called ___

Natural zeolite is mainly processed from ____________

In which process of water softening, the chemicals are added to remove hardness from water?

In which process of water softening, ion exchange phenomenon takes place?

What is CU in the expression CU= D60/D10 where D60 and D10 are the sizes of particle such that 60% and 10% of the particles are finer than these sizes respectively?

Which of the following should not be a composition of boiler-feed water?

Permutit has an exchange value of ________ grams of hardness per m3 of zeolite.

The value of uniformity coefficient for uniformly graded sand is ______

The effective size of sand of the slow sand filter is __________

The thickness of the layers of filter sand of zeolite softener is ____________

Which of the following is not commonly used as a filter material in the treatment of water?

The value of specific gravity for Garnet sand is ____

The color of the natural zeolite is ____________

Water is mainly used in boilers for the generation of ________________

Zeolites are complex compound of ____________

Which of the following is a disadvantage of the zeolite process?

Understanding Water Pollution and Its Effects on Aquatic Life

Water Pollution and Regulations

Pollutants From Wastewater: A Study on River Pollution Control and Wastewater Treatment

Water Treatment and Pollution Control

Compounds, Fluoridation, and Oxidation Resistance

Grit Chambers and Activated Sludge Processes

Demineralized Water, Ion-Exchange, and Ozonation Processes

Sewage Sludge and Treatment Processes

Filters

Exam 4: Water Treatment and Softening Processes

Which of the following statement is correct?

The uniformity characteristics of sand expressed in terms of __________

The chemical formula of Permutit is ____________

____ represents the size of sand particle such that 10% of particles are finer than this size.

If the precipitate formed is soft, loose and slimy, these are __________ and if the precipitate is hard and adhering on the inner wall, it is called _____________

Natural zeolite is mainly processed from ____________

In which process of water softening, the chemicals are added to remove hardness from water?

In which process of water softening, ion exchange phenomenon takes place?

What is CU in the expression CU= D60/D10 where D60 and D10 are the sizes of particle such that 60% and 10% of the particles are finer than these sizes respectively?

Which of the following should not be a composition of boiler-feed water?

Permutit has an exchange value of ________ grams of hardness per m3 of zeolite.

The value of uniformity coefficient for uniformly graded sand is ______

The effective size of sand of the slow sand filter is __________

The thickness of the layers of filter sand of zeolite softener is ____________

Which of the following is not commonly used as a filter material in the treatment of water?

The value of specific gravity for Garnet sand is ____

The color of the natural zeolite is ____________

Water is mainly used in boilers for the generation of ________________

Zeolites are complex compound of ____________

Which of the following is a disadvantage of the zeolite process?

Understanding Water Pollution and Its Effects on Aquatic Life

Water Pollution and Regulations

Pollutants From Wastewater: A Study on River Pollution Control and Wastewater Treatment

Water Treatment and Pollution Control

Compounds, Fluoridation, and Oxidation Resistance

Grit Chambers and Activated Sludge Processes

Demineralized Water, Ion-Exchange, and Ozonation Processes

Sewage Sludge and Treatment Processes

Filters

If the precipitate formed is soft, loose and slimy, these are and if the precipitate is hard and adhering on the inner wall, it is called ___