331. Permanent loss in a venturimeter is about __________ percent of the pressure drop in theupstream cone.
1
10
40
70
✅ The correct answer is option B.
Fluid Mechanics MCQs
332. The __________ is measured by a piezometric opening.
Dynamic pressure
Static pressure
Total pressure
Point velocity
✅ The correct answer is option C.
333. In case of turbulent flow of a Newtonion fluid in a straight pipe, the maximum velocity is equal to (where, Vavg = average fluid velocity)
Vavg
1.2 Vavg
1.5 Vavg
1.8 Vavg
✅ The correct answer is option B.
334. What is the ratio of the velocity at the axis of the pipe to the mean velocity of flow in case of pipe flow under viscous condition?
0.5
0.67
1
2
✅ The correct answer is option D.
335. Low specific speed of a pump implies that, it is a/an __________ pump.
Axial flow
Centrifugal
Mixed flow
None of these
✅ The correct answer is option B.
336. In a free vortex, the
Velocity changes linearly with radial distance
Flow is necessarily rotational
Radial component of velocity is same everywhere
Stream lines are not circular
✅ The correct answer is option A.
337. As the velocity V and thus the Reynolds number of a flow past a sphere increases from very low value, the drag force for Re << 1
Increases linearly with V
Decreases linearly with V
Decreases as V²
None of these
✅ The correct answer is option A.
338. Delivery of insufficient quantity of liquid by a pump may be caused by
Air leak in the inlet
Low rpm
Too high a lift
All of the above
✅ The correct answer is option D.
339. Boiler feed water pump is usually a __________ pump.
Reciprocating
Gear
Multistage centrifugal
Diaphragm
✅ The correct answer is option C.
340. The continuity equation in ideal fluid flow states that
Net rate of inflow into any small volume must be zero
Energy is not constant along a streamline
Energy is constant along a streamline
There exists a velocity potential
✅ The correct answer is option A.