Related Questions

Which of the following indicates the types of soil erosion in decreasing order of damage caused In India
A Ravine erosion .and gullies, alkalinity and salinity weeds and water-logging
B Alkalinity and water-logging, ravine erosion and weeds
C Water-logging, weeds, salinity and ravine erosion
D All are equally damaging
When the metal is removed by erosion caused by rapidly recurring spark discharges between the tool and work, the process is known as
A Electrochemical machining
B Electro-discharge machining
C Ultrasonic machining
D None of these
The most economical section of a rectangular channel is one which has hydraulic mean depth or hydraulic radius equal to
A Half the depth
B Half the breadth
C Twice the depth
D Twice the breadth
The hydraulic mean depth or the hydraulic radius is the ratio of
A Area of flow and wetted perimeter
B Wetted perimeter and diameter of pipe
C Velocity of flow and area of flow
D None of these
The damage/deterioration of metals by the __________ action of fluids is called 'erosion'.
A Abrasive
B Corrosive
C Both A & B
D Neither A nor B
In a sample of 50 people, 19 had type O blood, 22 had type A blood, 7 had type B blood and 2 had type AB blood. If a person is selected randomly, find the probability that the person has neither type A nor type O blood?
A 15/25
B 31/50
C 11/25
D 9/50
Although pocket gophers 'damage' crops, their 'tunneling' aerates the soil, which helps 'conserve' ground water and 'preventing' erosion.
A damage
B tunneline
C conserve
D preventing
Which one is the true cause of river erosion-
A Monsoon
B Temperature rise
C Climate change
D River pollution
Which one is not the driver of soil erosion?
A Water
B wind
C surface water
D rainfall
Which one of the following river valleys of India is under the influence of intensive gully erosion?
A Kosi
B Chambal
C Damodar
D Brahmaputra

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