Civil Engineering MCQs

Page No. 168

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


aN = y + R

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b y = N + R

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c R = N + y

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d R > (N + y)

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View Answer N = y + R

Which of the following is not a water borne disease ?


adysentery

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bcholera

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ctyphoid

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dmaleria

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View Answer maleria

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


a0.1 ppm

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b0.01 ppm

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c0.001 ppm

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d 0.0001 ppm

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View Answer 0.001 ppm

The maximum discharge of a tube-well is about_________________?


a5 litres/sec

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b 50 litres/sec

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c500 litres/sec

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d1000 litres/see

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View Answer 50 litres/sec

Ground water is usually free from________________?


asuspended impurities

✓


bdissolved impurities

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cboth suspended and dissolved impuri¬ties

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dnone of the above

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View Answer suspended impurities

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


ahardness in water

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b turbidity in water

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cdissolved oxygen in water

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d residual chlorine in water

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View Answer hardness in water

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


a 2

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b5

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c7

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d10

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View Answer 2

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


a10 ppm

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b 20 ppm

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c30 ppm

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d50 ppm

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View Answer 10 ppm

Orthotolidine test is used for determination of________________?


adissolved oxygen

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bresidual chlorine

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cbiochemical oxygen demand

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d dose of coagulant

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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

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b0.05 to 0.5 ppm

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c0.5 to 1.0 ppm

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d1.0 to 5.0 ppm

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View Answer 0.05 to 0.5 ppm

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