hydraulics and fluid mechanics




1).
One litre of water occupies a volume of
A   100 cm3   
B   250 cm3   
C   500 cm3   
D   1000 cm3   
ANS: D - 1000 cm3

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2).
The value of bulk modulus of a fluid is required to determine
A   Reynold's number   
B   Froude's numbe   
C   Mach number   
D   Euler's number   
ANS: C - Mach number

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3).
In a depressed nappe
A   the pressure below the nappe is atmospheric   
B   the pressure below the nappe is negative   
C   the pressure above the nappe is atmospheric   
D   the pressure above the nappe is negative   
ANS: D - the pressure above the nappe is negative

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4).
In one dimensional flow, the flow
A   is steady and uniform   
B   takes place in straight line   
C   takes place in curve   
D   takes place in one direction   
ANS: B - takes place in straight line

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6).
The discharge over a right angled notch is (where H = Height of liquid above the apex of notch)
A    Cd√ 2g x H   
B    Cd 2g x H3/2   
C    Cd 2g x H2         
D    Cd 2g x H5/2   
ANS: D -  Cd 2g x H5/2

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7).
A weir is said to be broad crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest.
A   equal to.   
B   less than   
C   more than   
ANS: C - more than

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8).
A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. The total pressure on the wall per unit length is (where w = Specific weight of liquid, and H = Height of liquid)
A   wH   
B   wH/2   
C   wH2/2   
D   wH2/3   
ANS: D - wH2/3

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9).
An error of 1% in measuring head over the apex of the notch (H) will produce an error of __________ in discharge over a triangular notch.
A   1%   
B   1.5%   
C   2%   
D   2.5%   
ANS: D - 2.5%

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