471. In case of supersonic flow of a fluid through pipeline, the ‘Mach number’ is
0
1
< 1
> 1
✅ The correct answer is option D.
Fluid Mechanics MCQs
472. Cavitation in a centrifugal pump results from
High discharge pressure
Low barometric pressure
High discharge velocity
High discharge rate
✅ The correct answer is option B.
473. For a given fluid flow rate, which of the following incurs maximum head loss?
Orifice meter
Venturimeter
Flow nozzle
All of the above
✅ The correct answer is option A.
474. Check valve is used for __________ flow.
Very precise control of
Unidirectional
Multidirectional
None of these
✅ The correct answer is option B.
475. Which of the following produces maximum pressure difference for transportation of gases?
Vaccum pumps
Blowers
Fans
Compressors
✅ The correct answer is option D.
476. Cp/Cv is termed as
Adiabatic constant
Mach number
Weber number
Prandtl number
✅ The correct answer is option A.
477. The __________ pressure is measured by a static tube.
Dynamic
Static
Total
None of these
✅ The correct answer is option B.
478. 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.
479. 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.
480. 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.