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.Management Sciences
Category: Water Management
According to Chezy’s formula, the discharge through an open channel is equal to _________________?
A. C (mi) 1/2
B. A (cmi)1/2
C. Ac√R.S
D. A (c.A/pi) 1/2
The contour of equal water heads and pressure in the soil mass beneath retaining structure are called___________________?
A. Stream lines
B. Equipotential lines
C. Equilibrium lines
D. Streak lines
A dam which is prevented from overturning by the action of lateral or vertical up thrust of water by its weight is called __________________?
A. Gravity dam
B. Arch dam
C. Buttress dam
D. Coffer dam
The sheet or small layer of water flowing over an ogee spillway is called _________________?
A. Thin layer
B. Nappe
C. Water sheet
D. Water spillway
Mean velocity of flow in a river can be directly measured by means of ______________________?
A. Dickne’s formula
B. Current meter
C. Surface floats
D. Rod floats
The water way from a weir is determined by using Lacey’s wetted perimeter i.e. P=_______(Q)1/2 ?
A. 3.50
B. 3.75
C. 4.75
D. 5.75
The property of saturated soil mass which transmits appreciable quantities . water is called___________________?
A. Porosity
B. Transmissibility
C. Permeability
D. Discharge
Volume of water that unit volume of aquifer will give up by gravity pull is called ____________________?
A. Specific volume
B. Specific yield
C. Specific retention
D. All are correct
Sliding failure occurs in a solid gravity dam when____________________?
A. Resultant of all forces cuts the base of the dam out side the toe
B. Resultant of all forces cuts the base at the inner middle third point
C. Ratio of over turning moments exceeds than unity
D. Shear friction factor Is less than 1.5
When a weir is constructed, the downstream .bed of the river goes on eroding and consequently causes progressive lowering of the bed on downstream of weir called__________________?
A. Retrogression
B. Lowering down of bed
C. Ponding on down stream
D. All are correct
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