A wastewater sample contains 10-5.6 mmol/l of OH ions at 25� C. The pH of this s

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Question
A wastewater sample contains 10^-5.6 mmol/l of OH ions at 25� C. The pH of this sample is
Options
A. 8.6
B. 8.4
C. 5.6
D. 5.4

Correct Answer

5.4

GATE Exam Questions problems

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2. One of the probable causes of rutting on flexible pavements is
Options
A. excessive stripping of binder material from the wearing course
B. use of flaky aggregates in the wearing course
C. inadequate compaction of pavement layers
D. high wind speeds

4. Stopping sight distance is the minimum distance available on a highway which is the
Options
A. distance of sufficient length to stop the vehicle wihtout collision.
B. distance visible to a driver during night driving.
C. height of the object above the road surface.
D. distance equal to the height of the driver's eye above the road surface.

5. The particle size distribution curves are extremely useful for the classification of
Options
A. fine grained soils
B. coarse grained soils
C. both coarse grained and fine grained soils
D. silts and clays

6. The group efficiency of a pile group
Options
A. will be always less than 100%.
B. will be always greater than 100%.
C. may be less than 100% or more than 100%.
D. will be more than 100% for pile groups in cohensionless soils and less than 100% for those in cohesive soils.

10. A pile of 0.50 m diameter and of length 10 m is embedded in a deposit of clay. The un-drained strength parameters of the clay are cohesion = 60 kN/m² and the angle in internal friction = 0. The skin friction capacity (kN) of the pile for an adhesion factor of 0.6, is
Options
A. 671
B. 565
C. 283
D. 106

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