Question8:-Temporary hardness in water is caused by the presence of
AsBicarbonate of Ca and Mg
8:-Sulphate of Ca and Mg
Chlorides of Ca and Mg
D:-Nitrates of Ca and Mg

Correct Answer:- Option-A

‘Question82:-The amount of standard soap solution required to obtain a permanent leather with a water sample of known volume with constant shaking determines the total hardness
in

A=Dr. Clark's process
B:-Hehner's process,

‎process‏ لك

‎

‎Durkheim's process

‎Correct Answer

‎

‎۱۴۰ 0۶۸
Question8’3:-The ratio of BOD to ultimate BOD is about
‏دہاجم‎
‎8:23
‏فرق‎
‎0:10
‎Correct Answer- Option8
Question84:-The most suitable solid waste disposal for rural area is
AsLand filing
B:-Deep well injection
Composting
नि
Correct Answer:- Option-C
Question85:-The indoor method of composting takes

‎months to complete the process.
AvLand %

‎

‎[

‎Correct Answer: Option-D
Question86:-Which of the following gases is responsible for acid rain?
ഡാം
പം
८-502
೦-೮೫,
Correct Answer:-Question Cancelled
Question87-The device used for easy separation of dry dust of 10 to 100 um size is
AsCyclone
8:-Gravity settling chamber
ക്കി
D-Scrubber
Correct Answer Option-A
Questioné8:-Pollutant Standard Index (PSI) value in between 101-199 denotes the air quality as
Good
B:Moderate
ഡേ ‏لرطلاهة‎
‎പിട
‎ധോ 00൦൦
Questioné9:-Plumbosolvency is a health hazard in the transportation of
AsHard water only
B:-Soft water only
Both (2) and (2)
D:-Water containing plum juices
Correct Answer: Option-8
Question90;-Potable water treatment does not involve

‎A;Sedimentation