7
700
7000
630
✅ The correct answer is option A.
Fluid Mechanics MCQs
An ideal plastic substance indicates no deformation, when stressed upto yield stress, but behaves like a Newtonion fluid beyond yield stress. Which of the following is an ideal plastic?
Sewage sludge
Rubber latex
Blood
Sugar solution
✅ The correct answer is option A.
For one dimensional flow of an incompressible fluid in unsteady state in x-direction, the continuity equation is given by
∂u/∂x = 0
∂(ρu)/∂x = 0
∂u/∂x = – ∂ρ/∂t
∂ρ/∂t = 0
✅ The correct answer is option A.
Fluid flow in a/an __________ is an example of pressure flow.
Partially filled pipeline
Pipe
Open channel
River
✅ The correct answer is option B.
Transition length for turbulent flow in smooth pipe is equal to __________ times the pipe diameter.
0.5
5
50
100
✅ The correct answer is option C.
Hydraulic radius of 6″ x 12″ cross-section, is __________ inches.
2
0.5
1.5
None of these
✅ The correct answer is option A.
Nominal Pipe Size (NPS) of a pipe less than 12 inches in diameter indicates its
Inner diameter
Outer diameter
Thickness
Neither inner nor outer diameter
✅ The correct answer is option D.
Flow measurement in an open channel is done by a/an
Venturimeter
Orificemeter
Weir
Rotameter
✅ The correct answer is option C.
Flow rate of high velocity flue gas discharged through a stack to the atmosphere can be most conveniently measured by a
Pitot tube
Manometer
Rotameter
None of these
✅ The correct answer is option A.
Centrifugal pumps as compared to reciprocating pumps
Run at a lower speed for the same discharge
Do not need priming
Deliver fluid with pulsating/fluctuating discharge
Can be run with discharge line valve closed for a short interval
✅ The correct answer is option D.