Quality Control of Water · Environmental Engineering · GATE CE

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Marks 1

GATE CE 2024 Set 1
The following table gives various components of Municipal Solid Waste (MSW) and a list of treatment/separation techniques.table { width: 100%; border-...
GATE CE 2016 Set 2
The hardness of a ground water sample was found to be 420 mg/L as $$CaCO_3$$. A softener containing ion exchange resins was installed to reduce the to...
GATE CE 2015 Set 2
A groundwater sample was found to contain 500 mg/L total dissolved solids (TDS). TDS (in %) present in the sample is ________.
GATE CE 2014 Set 1
Some of the nontoxic metals normally found in natural water are
GATE CE 2007
The presence of hardness in excess of permissible limit causes
GATE CE 2007
The alkalinity and the hardness of a water sample are 250 mg/L and 350 mg/L as $$CaCo_3$$, respectively. The water has
GATE CE 2005
1 TCU is equivalent to color produced by
GATE CE 2004
Most of the turbidity meters work on the scattering principle. The turbidity value obtained is expressed in
GATE CE 2002
In natural water, hardness is mainly caused by
GATE CE 1999
Temporary hardness in water is caused by the presence of
GATE CE 1998
The microbial quality of treated piped water supplies is monitored by
GATE CE 1997
Alkalinity of water can be defined correctly in one of the following ways
GATE CE 1997
MPN index is measure of one of the following:

Marks 2

GATE CE 2024 Set 1
Activated carbon is used to remove a pollutant from wastewater in a mixed batch reactor, which follows first-order reaction kinetics.At a reaction rat...
GATE CE 2024 Set 1
A water treatment plant treats 25 MLD water with a natural alkalinity of 4.0 mg/L (as CaCO3). It is estimated that, during the coagulation of this wat...
GATE CE 2017 Set 2
The analysis of a water sample produces the following results: The total hardness (in mg/L as $${\mathrm{CaCO}}_3$$) of the water sample is ______....
GATE CE 2016 Set 2
A sample of water has been analyzed for common ions and results are presented in the form of a bar diagram as shown. The non-carbonate hardness (expr...
GATE CE 2016 Set 1
Effluent from an industry 'A' has a pH of 4.2. The effluent from another industry 'B' has double the hydroxyl (OH-) ion concentration than the effluen...
GATE CE 2014 Set 1
For a sample of water with the ionic composition shown in the figure below, the carbonate and noncarbonate hardness concentrations (in mg/l as $${\mat...
GATE CE 2012
A water sample has a pH of 9.25. The concentration of hydroxyl ions in the water sample is
GATE CE 2010
Ion concentrations obtained for a groundwater sample (having pH=8.1) are given below. .tg {border-collapse:collapse;border-spacing:0;display:inline-...
GATE CE 2010
Ion concentrations obtained for a groundwater sample (having pH=8.1) are given below. .tg {border-collapse:collapse;border-spacing:0;overflow:auto;d...
GATE CE 2008
A wastewater sample contains $$10^{-5.6}$$ mol/l of OH- ions at $$25^o$$ C. The pH of this sample is
GATE CE 2005
If tomato juice is having a pH of 4.1, the hydrogen ion concentration will be
GATE CE 2000
Two Samples of Water A and B have pH values of a 4.4 and 6.4 respectively. How many times more acidic sample A is than sample B
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