A. Df + Bf = Wf
B. Df = Bf + Wf
C. Df + Bf + Wf =0
D. None of these
Related Mcqs:
- Drag force on the float of a Rotameter is (where Q = flow rate of the)__________________?
A. ∝ Q
B. ∝ √Q
C. ∝ Q2
D. Constant - A Rotameter through which air at room temperature and atmospheric pressure is flowing gives a certain reading for a flow rate of 100 cc/sec. If helium (molecular weight 4) is used and Rotameter shows the same reading, the flow rate (cc/sec) is__________________?
A. 26
B. 42
C. 269
D. 325 - In case of a Rotameter, the density of the float material is _____________ that of the liquid it replaces?
A. More than
B. Less than
C. Equal to
D. Either A. or B. - In which of the following body shapes, the pressure drag is large compared to the friction drag ?
A. Stream line body
B. Two dimensional body
C. Bluff body
D. None of these - The ratio of wall drag to total drag in the Stoke’s law range is_________________?
A. 0.5
B. 1
C. 1/3
D. 2/3 - The ratio of the wall drag to the form drag in the Stoke’s law range (for motion of spherical particles in a stationary fluid) is__________________?
A. 0.5
B. 1
C. 2
D. 0.33 - The buoyant force acting on a floating body is dependent on the _______________?
A. Viscosity of the liquid
B. Weight of the liquid displaced
C. Depth of immersion of the body
D. Surface tension of the liquid - The line of action of the buoyant force acts through the____________________?
A. Centroid of the displaced volume of fluid
B. Centre of gravity of a submerged body
C. Centroid of the volume of any floating body
D. None of these - The line of action of the buoyant force passes through the centre of gravity of the_______________________?
A. Submerged body
B. Displaced volume of the fluid
C. Volume of fluid vertically above the body
D. Horizontal projection of the body - In the low Reynolds number region, the drag force on a sphere is proportional to_______________?
A. V
B. V2
C. V4
D. V0.5
