sill or crest
nappe or vein
orifice
none of these
✅ The correct answer is option A.
Hydraulics and Fluid Mechanics MCQs
The total pressure on the top of a closed cylindrical vessel competely filled up with a liquid is
directly proportional to (radius)2
inversely proportional to (radius)2
directly proportional to (radius)4
inversely proportional
✅ The correct answer is option C.
The specific weight of compressible fluids does not remain constant.
TRUE
FALSE
✅ The correct answer is option A.
The atmospheric pressure at sea level is
103 kN/m2
10.3 m of water
760 mm of mercury
all of these
✅ The correct answer is option D.
The velocity at which the laminar flow stops, is known as
velocity of approach
lower critical velocity
higher critical velocity
none of these
✅ The correct answer is option B.
The total pressure on an immersed surface inclined at an angle θ with the liquid surface is
wA
wx
wAx
wAx/sin θ
✅ The correct answer is option C.
The ratio of the inertia force to the viscous force is called
Reynold’s number
Froude’s number
Weber’s number
Euler’s number
✅ The correct answer is option A.
The formula for discharge over a sharp-crested weir and Ogee weir is same as that of a rectangular weir
Agree
Disagree
✅ The correct answer is option A.
The force exerted by a moving fluid on an immersed body is directly proportional to the rate of change of momentum due to the presence of the body. This statement is called
Newton’s law of motion
Newton’s law of cooling
Newton’s law of viscosity
Newton’s law of resist
✅ The correct answer is option D.
When the coefficient of discharge (Cd) is 0.623, then the general equation for discharge over a rectangular weir is
1.84(L – 0.1nH)H3/2
1.84(L – nH)H2
1.84(L – 0.1nH)H5/2
1.84(L – nH)H3
✅ The correct answer is option A.