H
12.6 H
13.6 H
14.6 H
✅ The correct answer is option B.
Fluid Mechanics MCQs
512. When larger particles e.g., grains are subjected to fluidisation, the corresponding bed produced is termed as the __________ bed.
Spouted
Sluggish
Boiling
Teeter
✅ The correct answer is option A.
513. Which of the following is used for pumping crude oil from oil well?
Single stage centrifugal pump
Gear pump
Screw pump
Duplex/triplex reciprocating pump
✅ The correct answer is option D.
514. Which of the following two quantities when same, makes one pipe system equivalent to another pipe system?
Head & discharge
Length & discharge
Length & diameter
Friction factor & diameter
✅ The correct answer is option A.
515. The discharge through a rectangular weir varies as
H1/2
H5/2
H2/5
H3/2
✅ The correct answer is option D.
516. Friction produced by the formation of wakes is called the __________ friction.
Disk
Skin
Form
None of these
✅ The correct answer is option C.
517. The unit of dynamic viscosity in SI unit is
kg/m . sec
N/m²
m² /sec
m/N. sec
✅ The correct answer is option A.
518. What is the force required (in Newtons) to hold a spherical balloon stationary in water at a depth of H from the air-water iterface? The balloon is of radius 0.1 m and is filled with air.
4πg/3
0.01πgH/4
0.01πgH/8
0.04πgH/3
✅ The correct answer is option A.
519. The continuity equation
Relates mass flow rate along a stream tube
Relates work and energy
Stipulates that Newton’s second law of motion must be satisfied at every point in the fluid
None of these
✅ The correct answer is option A.
520. Net positive suction head (NPSH) of a centrifugal pump must be
Greater than the vapour pressure of the liquid
Less than the vapour pressure of the liquid
Equal to the vapour pressure of the liquid
Less than barometric pressure
✅ The correct answer is option A.