131. A nozzle is generally made of
cylindrical shape
convergent shape
divergent shape
convergent-divergent s
✅ The correct answer is option B.
Hydraulics and Fluid Mechanics MCQs
132. The velocity of flow is same at all points in the cross-section of a channel.
TRUE
FALSE
✅ The correct answer is option B.
134. When an internal mouthpiece is running free, the discharge through the mouthpiece is (where a = Area of mouthpiece, and H = Height of liquid above the mouthpiece)
0.5 a2gH
0.707 a2gH
0.855 a2gH
a2gH
✅ The correct answer is option A.
135. An opening in the side of a tank or vessel such that the liquid surface with the tank is below the top edge of the opening, is called
weir
notch
orifice
none of these
✅ The correct answer is option B.
136. Froude’s number is the ratio of inertia force to
pressure force
elastic force
gravity force
surface tension force
✅ The correct answer is option C.
137. A notch is used to measure __________ of liquids.
pressure
discharge
velocity
volume
✅ The correct answer is option B.
138. A flow is called sonic, if the Mach number is unity.
Agree
Disagree
✅ The correct answer is option A.
139. When the end contractions of the weir are suppressed, then number of end contractions (n) are taken as zero
Agree
Disagree
✅ The correct answer is option A.
140. A thick liquid like a syrup has a __________ viscosity than a light liquid like water.
lesser
greater
✅ The correct answer is option B.