201. 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.
Hydraulics and Fluid Mechanics MCQs
202. 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.
203. The top of the weir over which the water flows is known as
sill or crest
nappe or vein
orifice
none of these
✅ The correct answer is option A.
204. In a sharp-crested weir, the thickness of the weir is kept less than half of the height of water above the crest of the weir.
TRUE
FALSE
✅ The correct answer is option A.
205. Coefficient of discharge Cd is equal to (where Cc = Coefficient of contraction, Cv = Coefficient of velocity, and Cr = Coefficient of resistance)
Cc x Cv
Cc x Cr
Cv x Cr
Cc/Cr
✅ The correct answer is option A.
206. The discharge through a channel of trapezoidal section is maximum when
width of channel at the top is equal to twice the width at the bottom
depth of channel is equal to the width at the bottom
the sloping side is equal to half the width at the top
the sloping side is eq
✅ The correct answer is option C.
207. A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a
notch
weir
mouthpiece
nozzle
✅ The correct answer is option C.
208. The Euler’s equation for the motion of liquids is based upon the assumption that
the fluid is non – viscous, homogeneous and incompressible
the velocity of flow is uniform over the section
the flow is continuous, steady and along the stream line
all of the above
✅ The correct answer is option D.
209. The velocity of the liquid flowing through the divergent portion of a venturimeter
remains constant
increases
decreases
depends upon mass of l
✅ The correct answer is option C.
210. The most efficient section of a channel is
triangular
rectangular
square
trapezoidal
✅ The correct answer is option D.