91. In two dimensional flow, the flow does not take place in a curve.
TRUE
FALSE
✅ The correct answer is option B.
Hydraulics and Fluid Mechanics MCQs
92. The line of action of the force of buoyancy acts through the centre of gravity of the volume of the liquid displaced.
TRUE
FALSE
✅ The correct answer is option A.
93. The Francis formula for the discharge over Cippoletti weir is
1.84 LH1/2
1.84 LH
1.84 LH3/2
1.84 LH5/2
✅ The correct answer is option C.
94. An error of 1% in measuring head over the crest of the notch (H) will produce an error of __________ in discharge over a triangular notch,
1%
1.50%
2%
2.50%
✅ The correct answer is option D.
95. A notch is, usually, made of a metallic plate.
Correct
Incorrect
✅ The correct answer is option A.
96. A venturiflume is a flumed structure constructed across a channel by restricting its width.
TRUE
FALSE
✅ The correct answer is option A.
97. An open tank containing liquid is made to move from rest with a uniform acceleration. The angle 0 which the free surface of liquid makes with the horizontal is such that (where a = Horizontal acceleration of the tank, and g = Acceleration due to gravity)
tan θ = a/g
tan θ = 2 a/g
tan θ = a/2g
tan θ = a2/2g
✅ The correct answer is option A.
98. The pressure of air __________ with the increase of height from the surface of the earth.
does not change
decreases
increases
✅ The correct answer is option B.
99. The shear stress between the two liquid layers is __________ proportional to the distance between two layers.
directly
indirectly
✅ The correct answer is option B.
100. The centre of pressure for a vertically immersed surface lies at a distance equal to __________ the centre of gravity.
below
above
below
above
✅ The correct answer is option A.