411. The peripherial velocity at inlet of a centrifugal pump having inlet diameter of 25 cms and rotating at 950 rpm is __________ m/sec.
1.8
12.4
186.2
736.4
✅ The correct answer is option B.
Fluid Mechanics MCQs
412. Applicability of Bernoulli’s equation is limited to a/an __________ fluid, that does not exchange shaft work with the surroundings.
Incompressible
Non-viscous
Both A and B
Neither A nor B
✅ The correct answer is option C.
413. The maximum delivery pressure of a reciprocating compressor may be about __________ kg/cm².
1000
2000
3000
4000
✅ The correct answer is option D.
414. The pressure at a point in a fluid is not the same in all directions, when the fluid is viscous and
Moving
Static
Cold
Hot
✅ The correct answer is option A.
415. A tube is specified by its
Thickness only
Outer diameter only
Thickness & outer diameter both
Inner diameter
✅ The correct answer is option C.
416. Capacity of a hydraulic accumulator is defined in terms of maximum
Amount of energy stored
Flow rate through accumulator
Rate of falling of ram
Volume available in the cylinder
✅ The correct answer is option A.
417. With decrease in particle size to be fluidised by a particular fluid, the operating range of fluidisation velocity
Widens
Squeezes
Does not change
Unpredictable from the data
✅ The correct answer is option C.
418. What is the maximum theoretical suction lift (metres) of a reciprocating pump?
5
10
50
100
✅ The correct answer is option B.
419. Minimum fluidisation velocity for a specific system depends upon the
Particle size
Fluid viscosity
Density of both the particle & the fluid
All of the above
✅ The correct answer is option D.
420. Actual lift of a pump is always less than the theoretical lift and is limited by the
Specific gravity & temperature of the liquid
Leakage & pressure decreasing at higher elevations
Frictional resistance through pipes, fittings & passages
All of the above
✅ The correct answer is option D.