Civil Engineering MCQs

Page No. 168

Select the correct relationship between porosity (N), specific yield (y) and specific retention (R)________________?


aN = y + R


b y = N + R


c R = N + y


d R > (N + y)


View Answer N = y + R

Which of the following is not a water borne disease ?


adysentery


bcholera


ctyphoid


dmaleria


View Answer maleria

The phenolic compounds in public water supply should not be more than_______________?


a0.1 ppm


b0.01 ppm


c0.001 ppm


d 0.0001 ppm


View Answer 0.001 ppm

The maximum discharge of a tube-well is about_________________?


a5 litres/sec


b 50 litres/sec


c500 litres/sec


d1000 litres/see


View Answer 50 litres/sec

Ground water is usually free from________________?


asuspended impurities


bdissolved impurities


cboth suspended and dissolved impuri¬ties


dnone of the above


View Answer suspended impurities

Standard EDTA (ethylene diamine tetra acetic aciD. solution is used to determine the_______________?


ahardness in water


b turbidity in water


cdissolved oxygen in water


d residual chlorine in water


View Answer hardness in water

Which of the following values of pH represents a stronger acid?


a 2


b5


c7


d10


View Answer 2

On standard silica scale, the turbidity in drinking water should be limited to_______________?


a10 ppm


b 20 ppm


c30 ppm


d50 ppm


View Answer 10 ppm

Orthotolidine test is used for determination of________________?


adissolved oxygen


bresidual chlorine


cbiochemical oxygen demand


d dose of coagulant


View Answer residual chlorine

The amount of residual chlorine left in public water supply for safety against pathogenic bacteria is about______________?


a0.01 to 0.05 ppm


b0.05 to 0.5 ppm


c0.5 to 1.0 ppm


d1.0 to 5.0 ppm


View Answer 0.05 to 0.5 ppm

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