Category: Fluid Mechanics

A. one which obeys Newton’s law of viscosity
B. frictionless and incompressible
C. very viscous
D. frictionless and compressible

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. when its metacentric height is zero
B. when the metacentre is above the centre of gravity
C. when the metacentre is below the centre of gravity
D. only when its centre of gravity is below its centre of buoyancy

A. a circular disc or plate held normal to flow
B. a sphere
C. a cylinder
D. an airfoil

A. 1.00
B. 0.855
C. 0.7H
D. 0.611

A. log-log plot of friction factor against Reynolds number
B. log-log plot of relative roughness against Reynolds number
C. semi-log plot of friction factor against Reynolds number
D. semi-log plot of friction factor against relative roughness

A. d > m > e
B. d > e > m
C. e > m > d
D. e > d > m

1. increases stability
2. decreases stability
3. increases comfort for passengers
4. decreases comfort for passengers
The correct answer is?

A. (1) and (3)
B. (1)and(iv)
C. (2) and (3)
D. (2) and (4)

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. 22.5 m/sec
B. 33 m/sec
C. 40 m/sec
D. 90 m/sec