A. Sedimentation
B. Coagulation
C. Disinfection
D. Softening
Related Mcqs:
- The most widely used coagulant for removing suspended impurities from water is__________________?
A. Bleaching powder
B. Chlorine
C. Calcium sulphate
D. Alum - Most widely and commonly used coagulant for the removal of suspended impurities in water is __________________?
A. Bleaching powder
B. Slaked lime
C. Alum
D. Copper sulphate - Impurities present in brine is normally removed by treatment with ?
A. NH3 and CO2
B. Lime and soda ash
C. Lime, ammonia and carbon
D. All A , B. and C. - Which of the following impurities in feed water for high pressure boiler is the most detrimental ?
A. Silica
B. Dissolved oxygen
C. Suspended salt
D. Dissolved salt - Permanent hardness of water can be removed by___________________?
A. Boiling
B. Adding Ca(OH)2
C. Boiling it with Na2CO3
D. None of these - Permanent hardness of water can be removed by____________________?
A. Simply boiling
B. Adding alum
C. Passing it through cation & anion exchangers
D. All (A), B. and (C) - Permanent hardness of water can be removed by_________________?
A. Addition of soda ash to it
B. Treating it with zeolites
C. Passing it through sodium hexametaphosphate
D. All A , B, and C. - Temporary hardness of water can be removed by__________________?
A. Addition of alum (a coagulant)
B. Boiling
C. Filtration (through gravity sand filter)
D. Addition of lime - Solvay process as compared to dual process (i.e. modified Solvay process) ?
A. Can use low grade brine
B. Has less corrosion problems
C. Involves higher investment in NH3 recovery units than that for crystallisation units for NH4Cl
D. Both B. and C. - Polymerisation product of C2F4 (carbon tetrafluoride) is called P.T.F.E (poly chloro tetra fluoro ethylene). It is also called___________________?
A. Polyurethane
B. Silicone
C. Teflon
D. Epoxy resin
