Related Questions

For determining the velocity of flow of underground water, the most commonly used non-empirical formula is
A Darcy’s formula
B Slichter’s formula
C Hazen’s formula
D Lacy’s formula
Which of the following is not a result of underground water activity?
A Stalactites
B Stalagmites
C Sink holes
D Fiords
Grey cast iron (used for making underground water pipes and manhole covers) as compared to steel has higher
A Ductility
B Impact strength
C Machinability
D Melting point
One of the following is not the result of underground water action
A Stalactities
B Stalagmites
C Sink holes
D Fiords
The main pollutant in waste water discharged from a petroleum refinery is oil (both in free and emulsified form). Free oil is removed by
A Biological oxygen pond
B Aerated lagoons
C Trickling filters
D Gravity separator having oil skimming devices
Which of the following is the most lethal water pollutant?
A Phenol and cynide
B Chlorine
C Alkalis
D Suspended solids
Most poisonous pollutant in water is
A Lead
B Zinc
C Phosphate
D Arsenic
Which of the following is not a water pollutant?
A Chromium
B Silt
C Glacier
D Arsenic
The world's first underground railway system was built in -
A Berlin
B Moscow
C New York
D London
The tunnels, the artificial underground passages are constructed for:
A Highways
B Railways
C Sewerage
D All the above

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