Flow nozzle
Venturimeter
Rotameter
Orificemeter
✅ The correct answer is option B.
Fluid Mechanics MCQs
Power requirement of fans having constant wheel diameter varies __________ fan speed.
As square of
Directly as
As cube of
None of these
✅ The correct answer is option C.
Which of the following produces maximum pressure difference for transportation of gases?
Vaccum pumps
Blowers
Fans
Compressors
✅ The correct answer is option D.
Cp/Cv is termed as
Adiabatic constant
Mach number
Weber number
Prandtl number
✅ The correct answer is option A.
The __________ pressure is measured by a static tube.
Dynamic
Static
Total
None of these
✅ The correct answer is option B.
Small pressure differences in liquids is measured using a/an
U-tube manometer
Inclined tube manometer
Pitot tube
None of these
✅ The correct answer is option B.
A centrifugal pump designed for handling water (μ = 1 cp) will deliver __________ when pumping a thicker oil (μ = 30 cp).
Less head & capacity
More head
More capacity
Less head & more capacity
✅ The correct answer is option A.
Correction for capillary effect in manometers (used for pressure measurement) need not be applied, if diameter of the manometer tube is __________ mm.
< 4
> 4
> 12.5
< 10
✅ The correct answer is option C.
With the increase in depth, the hydrostatic pressure in an unaccelerated incompressible fluid (in a constant gravitational field)
Decreases
Increases linearly
Increases exponentially
Remains constant
✅ The correct answer is option B.
A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun’s equation for the above fluid-particle system (in SI units) is given below : Δ P/L = 375 x 10³ VOM + 10.94 x 10⁶ V²OM (SI units) If water is to be used as the fluidising medium, the minimum fluidisation velocity, VOM is
12 mm/s
16 mm/s
24 mm/s
28 mm/s
✅ The correct answer is option B.