271. A streamline is
The line connecting the mid-points of flow cross-sections
Defined for uniform flow only
Drawn normal to the velocity vector at every point
Always the path of a particle
✅ The correct answer is option C.
Fluid Mechanics MCQs
272. In which type of fluid flow, the velocity of flow of fluid changes from point to point in the fluid at any instant?
Rotational
Unsteady
Turbulent
Non-uniform
✅ The correct answer is option D.
273. When the head pumped against is less than the head of the fluid used for pumping, the usual device is a/an
Ejector
Blower
Injector
Airlift
✅ The correct answer is option D.
274. Which of the following pipe bends will incur the largest head loss ?
U-bend
30° bend
45° bend
90° bend
✅ The correct answer is option A.
275. Which of the following is a dimensionless parameter?
Angular velocity
Specific weight
Kinematic viscosity
None of these
✅ The correct answer is option D.
276. The variable required to be known in correlations used for estimating the horse power of a centrifugal gas compressor and hence its cost are P. Inlet pressure Q. Compressor rpm R. Delivery pressure S. Volumetric flow rate at inlet.
P, Q and R
P and R
R and S
P, Rand S
✅ The correct answer is option A.
277. Forces acting on a particle settling in fluid are __________ forces.
Gravitational & buoyant
Centrifugal & drag
Gravitational or centrifugal buoyant drag
External, drag & viscous
✅ The correct answer is option C.
278. In a dry packed bed, the pressure drop will be changed by increasing the flow rate as
V1.8
V-0.8
V
V-1
✅ The correct answer is option A.
279. Mercury is an ideal barometric fluid mainly due to its
High density
Low compressibility
Low capillary action
Very low vapor pressure
✅ The correct answer is option D.
280. Schedule number of a pipe, which is a measure of its wall thickness, is given by
1000 P’/S
100 P’/S
1000 S/P’
10000 P’/S
✅ The correct answer is option A.