Save power in compressing a given volume to a given pressure
Cool the delivered air
Achieve the exact delivery pressure
None of these
✅ The correct answer is option A.
Fluid Mechanics MCQs
What is the ratio of displacement thickness to nominal thickness for a linear distribution of velocity in the boundary layer on a flat plate?
0.5
1
1.5
2
✅ The correct answer is option A.
Which of the following conditions must be satisfied for lift force to be developed?
The body should be bluff body
The body should be stream lined
Circulation around the body is essentially required
The main stream velocity must approach the velocity of sound in that fluid medium
✅ The correct answer is option C.
Plunger pumps are used for
Higher pressure
Slurries
Viscous mass
None of these
✅ The correct answer is option A.
While starting a centrifugal pump, its delivery valve should be kept
Opened
Closed
Either opened or closed ; it does not make any difference
Either opened or closed; depending on the fluid viscosity
✅ The correct answer is option B.
Stoke’s equation is valid in the Reynolds number range
0.01 to 0.1
0.1 to 2
2 to 10
10 to 100
✅ The correct answer is option A.
Hydrometer measures the specific gravity of liquids based on the principles of buoyancy. Pycnometer is used to measure the specific gravity of
Powder & grannular solids
Liquids
Low melting point semi-solids
All of the above
✅ The correct answer is option D.
Piezometric head is the sum of the __________ heads.
Elevation & kinetic energy
Elevation & pressure
Kinetic energy & pressure
None of these
✅ The correct answer is option B.
The velocity distribution in direction normal to the direction of flow in plane Poiseuille flow is
Hyperbolic
Parabolic
Linear
None of these
✅ The correct answer is option B.
Brownian movement is prominent in the particle size range of __________ microns in case of settling of a particle in a fluid.
2 to 3
0.01 to 0.10
200 to 300
100 to 1000
✅ The correct answer is option A.