Related Questions

When a plate is immersed in a liquid parallel to the flow, it will be subjected to a pressure __________ that if the same plate is immersed perpendicular to the flow.
A Less than
B More than
C Equal to
D None of these
With the same cross-sectional area and immersed in same turbulent flow, the largest total drag will be on
A a circular disc of plate held normal to flow
B a sphere
C a cylinder
D a streamlined body
Deformation drag, which is caused by widespread deformation of fluid around the immersed body
A Occurs when NRe is very small
B Is primarily a friction drag
C Is independent of body length
D Depends mainly on cross-sectional shape
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 $$\frac{1}{3}$$
D $$\frac{2}{3}$$
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
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 theflow direction
C The component being normal to the flow direction
D None of these
The net positive suction head (NPSH) of a centrifugal pump is defined as the sum of the velocity head and the pressure head at the
A Discharge
B Suction
C Suction minus vapor pressure of the liquid at suction temperature
D Discharge minus vapor pressure of the liquid at the discharge temperature
A body of mass ‘m’ moving with a constant velocity ‘v’ strikes another body of same mass moving with same velocity but in opposite direction. The common velocity of both the bodies after collision is
A v
B 2v
C 4v
D 8v
Scheme-1: C6H5N2Cl→CuCNC6H5CN→H2o/H+C6H5COOH→∆Product-I Scheme-2: C6H5NO2→Fe/HCLC6H5NH2→N2NO3+HCL, 273KC6H5N2Cl→H2O/H+Product-II Scheme-3: CH3COOH→NH3CH3CONH2→NaOBrProduct-III উল্লিখিত Scheme সমূহে Product-I, Product-II এবং Product-III হলো যথাক্রমেঃ
A C6H5COONH4, C6H5Cl and CH3OH
B C6H5CONH2, C6H5NH2 and CH3OH
C C6H5CONH2, C6H5NH2 and CH3NH2
D C6H5CONH2, C6H5OH and CH3OH

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