Multiple Choice
Which of the following statement is correct?
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
Correct Answer:

Verified
Correct Answer:
Verified
Q2: The uniformity characteristics of sand expressed in
Q3: The chemical formula of Permutit is _<br>A)SiOAl<sub>2</sub>O<sub>3</sub>Na<sub>2</sub>O<br>B)SiO<sub>2</sub>Al<sub>2</sub>O<sub>3</sub>Na<sub>2</sub>O<br>C)SiO<sub>2</sub>Al<sub>2</sub>O<sub>3</sub>NaO<br>D)SiO<sub>3</sub>Al<sub>2</sub>O<sub>3</sub>Na<sub>2</sub>O
Q4: _ represents the size of sand particle
Q5: If the precipitate formed is soft, loose
Q6: Natural zeolite is mainly processed from _<br>A)White
Q7: In which process of water softening, the
Q8: In which process of water softening, ion
Q9: What is CU in the expression CU=
Q10: Which of the following should not be
Q11: Permutit has an exchange value of _