Related Questions

The detention period and overflow rate respectively for plain sedimentation as compared to sedimentation with coagulation are generally
A Less and more
B Less and less
C More and less
D More and more
In testing a pile by load test, pile platform is loaded with one and half times the design load and a maximum settlement is noted. The load is gradually removed and the consequent rebound is measured. For a safe pile, the net settlement (i.e. total settlement minus rebound) per tonne of test load should not exceed
A 10 mm
B 15 mm
C 20 mm
D 25 mm
The detention period for plain sedimentation water tanks, is usually
A 4 to 8 hours
B 8 to 16 hours
C 16 to 24 hours
D 24 to 36 hours
The overflow rate for plain sedimentation tanks is about
A 500 to 750 liters/hour/m2
B 1000 to 1250 liters/hour/m2
C 1250 to 1500 liters/hour/m2
D 1500 to 2000 liters/hour/m2
The normal value of over flow rates for plain primary sedimentation tanks, ranges between
A 25,000 to 35,000 litres/sqm/day
B 40,000 to 50,000 litres/sqm/day
C 50,000 to 60,000 litres/sqm/day
D 80,000 to 100,000 litres/sqm/day
When the axis of load lies in the plane of rivet group, then the most heavily loaded rivet will be the one which (where, Fa is the load shared by each rivet due to axial load and Fm is the shearing load due to moment in any rivet.)
A Is at the maximum distance from CG of the rivet group
B Is at the minimum distance from CG of the rivet group
C Gives the maximum angle between the two forces Fa and Fm
D Gives the minimum angle between the two forces Fa and Fm
Coal mines drainage waste water (acidic in nature) results from the earth's water percolating through the voids created in coal bed during mining. This polluted water which either drains out naturally to water courses or are removed before starting the mining is
A Neutralised by alkali treatment
B Left as such without any treatment
C Diluted with fresh water to reduce its acidity
D None of these
The Chairman of Rajya sabha can be removed from his office only if he is removed from :
A Removed from Lok Shaba
B The office of President
C The office of Vice-President
D None of Above
The velocity of flow of water in a sedimentation tank is about
A 5 to 10 cm/sec
B 15 to 30 cm/sec
C 15 to 30 cm/minute
D 15 to 30 cm/hour
In a sedimentation tank, the detention period for water ranges from __________ hours.
A 2 to 4
B 8 to 12
C 16 to 20
D 24 to 32

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