Q. There are protozoa present in the water. Its name is Dinobryen. What is the dose of copper sulfate required to kill it?

View solution

Q. The fluoride concentration for prevention of dental caries is ____________

View solution

Q. In which process, the fluoride content of water is raised?

View solution

Q. Which of the following is not used as a fluoride compound?

View solution

Q. Which of the following is the pure compound?

View solution

Q. As far as safer handling is considered, which of the following is used for fluoridation?

View solution

Q. Fluorides in solution form are preferred over powdered form for fluoridation.

View solution

Q. What happens when water contains 8-20 ppm of fluoride concentration?

View solution

Q. The process of reducing the fluoride content from water is called _____

View solution

Q. Which of the following is not used for defluoridation?

View solution

Q. At which temperature, the bone is calcinated during defluoridation with calcium phosphate?

View solution

Q. One cubic metre of bone can treat how much quantity of water containing 3.5 ppm of fluoride?

View solution

Q. Which material is used in contact filters for the removal of fluorides?

View solution

Q. Which material is used for removing fluorides from hard water containing 3ppm of fluorides?

View solution

Q. Fluorex is a special mixture of ____________

View solution

Q. Which of the following method is not used for desalination?

View solution

Q. Which of the following is not a type of distillation plant?

View solution

Q. Multistage flash evaporator produces _____ kg of water per kg of prime steam.

View solution

Q. Which of the following is the best evaporative desalinating method?

View solution

Q. The number of stages involved in the desalination using a multistage flash evaporator is _________________

View solution