Top 350+ Solved Hydraulics and Fluid Mechanics MCQ Questions Answer
Q. In a static fluid
a. Resistance to shear stress is small
b. Fluid pressure is zero
c. Linear deformation is small
d. Only normal stresses can exist
Q. A balloon lifting in air follows the following principle
a. Law of gravitation
b. Archimedes principle
c. Principle of buoyancy
d. All of the above
Q. The ratio of absolute viscosity to mass density is known as
a. Specific viscosity
b. Viscosity index
c. Kinematic viscosity
d. Coefficient of viscosity
Q. Reynold's number is the ratio of inertia force to
a. Pressure force
b. Elastic force
c. Gravity force
d. Viscous force
Q. Metacentric height is given as the distance between
a. The center of gravity of the body and the metacentre
b. The center of gravity of the body and the center of buoyancy
c. The center of gravity of the body and the center of pressure
d. Center of buoyancy and metacentre
Q. In a footstep bearing, if the speed of the shaft is doubled, then the torque required to overcome the viscous resistance will be
a. Double
b. Four times
c. Eight times
d. Sixteen times
Q. The continuity equation is connected with
a. Open channel/pipe flow
b. Compressibility of fluids
c. Conservation of mass
d. Steady/unsteady flow
Q. The most economical section of a trapezoidal channel is one which has hydraulic mean depth equal to
a. 1/2 × depth
b. 1/2 × breadth
c. 1/2 × sloping side
d. 1/4 × (depth + breadth)
Q. The absolute pressure is equal to
a. Gauge pressure + atmospheric pressure
b. Gauge pressure - atmospheric pressure
c. Atmospheric pressure - gauge pressure
d. Gauge pressure - vacuum pressure
Q. Unit of surface tension is
a. Energy/unit area
b. Velocity/unit area
c. Both of the above
d. It has no units
Q. A Piezometer tube is used only for measuring
a. Low pressure
b. High pressure
c. Moderate pressure
d. Vacuum pressure
Q. Pressure of the order of 10" torr can be measured by
a. Bourdon tube
b. Pirani Gauge
c. Micro -manometer
d. Lonisation gauge
Q. The volume of a fluid __________ as the pressure increases.
a. Remains same
b. Decreases
c. Increases
d. None of these