Fluid Mechanics

A. directly proportional to Reynolds number and independent of pipe wall roughness
B. directly proportional to pipe wall roughness and independent of Reynolds number
C. inversely proportional to Reynolds number and indpendent of pipe wall roughness
D. inversely proportional to Reynolds number and directly proportional to pipe wall roughness

A. 1/2
B. 2/3
C. 3/2
D. 2

A. laminar flow
B. transition flow
C. turbulent flow
D. not predictable from the given data

A. is constant over the cross-section
B. varies linearly from zero at walls to maximum at centre
C. varies parabolically with maximum at the centre
D. none of the above

A. laminar flow
B. transition flow
C. turbulent flow
D. critical flow

A. 0
B. r/2
C. r
D. 2r

A. head loss and discharge are same in two systems
B. length of pipe and discharge are same in two systems
C. friction factor and length are same in two systems
D. length and diameter are same in two systems

A. the length of pipe
B. the viscosity of fluid
C. the bulk modulus for the fluid
D. the original head

1. projected area of the body
2. mass density of the fluid
3. velocity of the body
The correct answer is ?

A. (1) and (2)
B. (1) and (3)
C. (2) and (3)
D. (1), (2) and (3)

A. 16/Re
B. 32/ Re
C. 64/ Re
D. none of the above where R,, is Reynolds number