1.3
1.66
2.5
None of these
✅ The correct answer is option D.
Fluid Mechanics MCQs
52. A hydraulic accumulator comprises of
A storage device and a control valve
A cylinder and a plunger
Two pistons and two cylinders
A storage tank and a ram pump
✅ The correct answer is option B.
53. A fluid is a substance, that
Has to be kept in a closed container
Is almost incompressible
Has zero shear stress
Flows when even a small shear is applied to it
✅ The correct answer is option D.
54. Velocity of liquid hydrocarbon fuels in a pipeline can not be measured by magnetic flowmeters, because their __________ is very low/small.
Thermal conductivity
Electrical conductivity
Specific gravity
Electrical resistivity
✅ The correct answer is option B.
55. The dimension of dynamic viscosity is
ML⁻¹T⁻¹
L²T⁻¹
LT⁻²
ML⁻¹T⁻²
✅ The correct answer is option A.
56. The distance between metacentre and __________ is called metacentric height.
Water surface
Centre of gravity
Centre of buoyancy
None of these
✅ The correct answer is option B.
57. In case of a pipe of constant cross-sectional area, the maximum fluid velocity obtainable is
The velocity of sound
Dependent on its cross-sectional area
Dependent on fluid viscosity
Dependent on fluid density
✅ The correct answer is option A.
58. Reynolds number for water flow through a tube of I.D. 5 cm is 1500. If a liquid of 5 centipoise viscosity and 0.8 specific gravity flows in the same pipe at the same velocity, then the pressure drop will
Increase
Decrease
Remain same
Data insufficient to predict pressure drop
✅ The correct answer is option A.
59. Drag is the force component exerted on an immersed object,
Passing the centroid of the body at 60°to the direction of motion
The component being parallel to theflow direction
The component being normal to the flow direction
None of these
✅ The correct answer is option B.
60. Volute of a centrifugal pump should be designed in a fashion, such that the
Kinetic head gets converted into static head
Moving stream gradually reduces velocity
Mean velocity remains constant
None of these
✅ The correct answer is option A.