61. The height of a water column equivalent to a pressure of 0.15 MPa is
15.3 m
25.3 m
35.3 m
45.3 m
✅ The correct answer is option A.
Hydraulics and Fluid Mechanics MCQs
62. Reynold’s number is the ratio of the inertia force to the
surface tension force
viscous force
gravity force
elastic force
✅ The correct answer is option B.
63. When a body, floating in a liquid, is given a small angular displacement, it starts oscillating about a point known as
centre of pressure
centre of gravity
centre of buoyancy
metacentre
✅ The correct answer is option D.
64. All the gases are considered to have compressible flow and all the liquids are considered to have incompressible flow.
Correct
Incorrect
✅ The correct answer is option A.
65. Kinematic viscosity is the product of dynamic viscosity and the density of the liquid.
Yes
No
✅ The correct answer is option B.
66. The viscosity of a liquid is due to cohesion of its particles.
Correct
Incorrect
✅ The correct answer is option A.
67. In an internal mouthpiece, if the jet after contraction expands and fills up the whole mouthpiece, then the mouthpiece is said to be running free.
TRUE
FALSE
✅ The correct answer is option B.
68. The vacuum pressure can be measured with the help of a piezometer tube.
TRUE
FALSE
✅ The correct answer is option B.
69. A flow through an expanding tube at constant rate is called
steady uniform flow
steady non-uniform flow
unsteady uniform flow
unsteady non-uniform f
✅ The correct answer is option B.
70. The property of a liquid which controls its rate of flow is called viscosity.
TRUE
FALSE
✅ The correct answer is option A.