A. 4/3
B. 3/2
C. 9/4
D. 27/8
✅ The correct answer is option C.
Fluid Mechanics MCQs
42. In series-pipe problems_______________?
A. the head loss is same through each pipe
B. the discharge is same through each pipe
C. a trial solution is not necessary
D. the discharge through each pipe is added to obtain total discharge
✅ The correct answer is option B.
43. The discharge through a V- notch varies as______________?
A. H1/2
B. H3’2
C. H5/2
D. H5’4 where H is head
✅ The correct answer is option C.
44. A rectangular block 2 m long, 1 m wide and 1 m deep floats in water, the depth of immersion being 0.5 m. If water weighs 10 kN/m3, then the weight of the block is________________?
A. 5kN
B. lOkN
C. 15 kN
D. 20 kN
✅ The correct answer is option B.
45. The horizontal component of force on a curved surface is equal to the_______________?
A. product of pressure intensity at its centroid and area
B. force on a vertical projection of the curved surface
C. weight of liquid vertically above the curved surface
D. force on the horizontal projection of the curved surface
✅ The correct answer is option B.
46. The shear stress distribution for a fluid flowing in between the parallel plates, both at rest, is_______________?
A. constant over the cross section
B. parabolic distribution across the section
C. zero at the mid plane and varies linearly with distance from mid plane
D. zero at plates and increases linearly to midpoint
✅ The correct answer is option C.
47. Metacentric height for small values of angle of heel is the distance between the________________?
A. centre of gravity and centre of buoy-ancy
B. centre of gravity and metacentre
C. centre of buoyancy and metacentre
D. free surface and centre of buoyancy
✅ The correct answer is option B.
48. Hot wire anemometer is used to measure_______________?
A. discharge
B. velocity of gas
C. pressure intensity of gas
D. pressure intensity of liquid
✅ The correct answer is option B.
49. Separation of flow occurs when_________________?
A. the pressure intensity reaches a minimum
B. the cross-section of a channel is reduced
C. the boundary layer comes to rest
D. all of the above
✅ The correct answer is option C.
50. A floating body is said to be in a state of stable equilibrium_________________?
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
✅ The correct answer is option B.