A. V
B. V2
C. V4
D. V0.5
Related Mcqs:
- As the velocity V and thus the Reynolds number of a flow past a sphere increases from very low value, the drag force for Re << 1 ?
A. Increases linearly with V
B. Decreases linearly with V
C. Decreases as V2
D. None of these - 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 - Which of the following relationship is valid for the equilibrium position of the float in a Rotameter? (Where, Df= Drag force on the float Bf = Buoyant force on the float Wf = Weight of the float)?
A. Df + Bf = Wf
B. Df = Bf + Wf
C. Df + Bf + Wf =0
D. None of these - Creeping flow around a sphere is defined, when particle Reynolds number is___________________?
A. < 2100
B. < 0.1
C. > 2.5
D. < 500 - Drag is defined as the force exerted by the___________________?
A. Fluid on the solid in a direction opposite to flow
B. Fluid on the solid in the direction of flow
C. Solid on the fluid
D. None of these - Drag force on the float of a Rotameter is (where Q = flow rate of the)__________________?
A. ∝ Q
B. ∝ √Q
C. ∝ Q2
D. Constant - Drag is the force component exerted on an immersed object, ?
A. Passing the centroid of the body at 60°to the direction of motion
B. The component being parallel to the flow direction
C. The component being normal to the flow direction
D. None of these - Drag force acting on a body does not depend upon the____________________?
A. Density of the fluid
B. Density of the body
C. Velocity of the body
D. Projected area of the body
