141. The product of mass and accelaration of flowing liquid is called
inertia force
viscous force
gravity force
pressure force
✅ The correct answer is option A.
Hydraulics and Fluid Mechanics MCQs
142. The pressure of a liquid measured with the help of a piezometer tube is
vacuum pressure
gauge pressure
absolute pressure
atmospheric pressure
✅ The correct answer is option B.
143. A flow through an expanding tube at increasing rate is called unsteady non-uniform flow.
Yes
No
✅ The correct answer is option A.
144. When a vertical wall is subjected to pressures due to liquid on both sides, the resultant pressure is the __________ of the two pressures.
sum
difference
arithmatic mean
geometric mean
✅ The correct answer is option B.
145. If the depth of water in an open channel is greater than the critical depth, the flow is called
critical flow
turbulent flow
tranquil flow
torrential flow
✅ The correct answer is option C.
146. In an internal mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to height of the liquid above the vena contracta.
less than
more than
✅ The correct answer is option A.
147. The coefficient of discharge is the ratio of theoretical discharge to the actual discharge through an orifice.
TRUE
FALSE
✅ The correct answer is option B.
148. According to Chezy’s formula, the discharge through an open channel is (where A = Area of flow, C = Chezy’s constant, m = Hydraulic mean depth, and i = Uniform slope in bed)
A m x i
C m x i
AC m x i
mi A x C
✅ The correct answer is option C.
149. When the Mach number is equal to unity, the flow is called sonic flow.
TRUE
FALSE
✅ The correct answer is option A.
150. A point, in a compressible flow where the velocity of fluid is zero, is called
critical point
vena contracta
stagnation point
none of these
✅ The correct answer is option C.