Atmospheric pressure
Sub-atmospheric pressure
Pressure difference between two points
None of these
✅ The correct answer is option C.
Fluid Mechanics MCQs
If ‘x’ is the depth of flow in an open channel of large width, then the hydraulic radius is equal to
x
x/2
x/3
2x/3
✅ The correct answer is option A.
Drag force on the float of a rotameter is(where Q = flow rate of the )
∝Q
∝√Q
∝Q²
Constant
✅ The correct answer is option D.
Non-colloidal solution is an example of the __________ fluid.
Non-Newtonion
Newtonion
Dilatent
Pseudoplastic
✅ The correct answer is option B.
Rise of liquid in a capillary tube is due to
Cohesion
Adhesion
Both A & B
Neither A nor B
✅ The correct answer is option C.
With increase in the ratio of orifice diameter to pipe diameter in case of an orificemeter, the overall pressure loss
Decreases
Increases
Remains constant
Increases linearly
✅ The correct answer is option C.
The curve of metacentre for a floating body __________ the curve of buoyancy.
Is always below
Is the evolute of
Intersects at right angle
Is tangential to
✅ The correct answer is option B.
For the laminar flow of a fluid in a circular pipe of radius R, the Hagen-Poisseule equation predicts the volumetric flow rate to be proportional to
R
R2
R4
R0.5
✅ The correct answer is option C.
What is the value of co-efficient of discharge for square edged circular orifice (for β = 0.3 to 0.5)?
0.61 – 0.63
0.5 – 0.75
0.75 – 0.90
0.35 – 0.55
✅ The correct answer is option A.
A fluid which has a linear relationship between the magnitude of applied shear-stress and the resulting rate of deformation is called a/an __________ fluid.
Newtonion
Non-Newtonion
Ideal
Incompressible
✅ The correct answer is option A.