Top 350+ Solved Hydraulics and Fluid Mechanics MCQ Questions Answer
Q. The most economical section of a rectangular channel is one which has hydraulic mean depth or hydraulic radius equal to
a. half the depth
b. half the breadth
c. twice the depth
d. twice the breadth
Q. A flow in which the viscosity of fluid is dominating over the inertia force is called
a. steady flow
b. unsteady flow
c. laminar flow
d. turbulent flow
Q. The flow of water through the hole in the bottom of a wash basin is an example of
a. steady flow
b. uniform flow
c. free vortex
d. forced vortex
Q. When a body is immersed wholly or partially in a liquid, it is lifted up by a force equal to the weight of liquid displaced by the body. This statement is called
a. Pascal's law
b. Archimede's principle
c. principle of floatation
d. Bernoulli's theorem
Q. The hydraulic gradient line lies over the centre line of the pipe by an amount equal to the
a. pressure head
b. velocity head
c. pressure head + velocity head
d. pressure head - velocity head
Q. When the pressure intensity at a point is more than the local atmospheric pressure, then the difference of these two pressures is called
a. gauge pressure
b. absolute pressure
c. positive gauge pressure
d. vacuum pressure
Q. The length of the divergent cone in a venturimeter is
a. equal to
b. double
c. three to four times
d. five to six times
Q. The total energy line lies over the centre line of the pipe by an amount equal to
a. pressure head
b. velocity head
c. pressure head + velocity head
d. pressure head - velocity head
Q. The metacentric height of a ship is 0.6 m and the radius of gyration is 4 m. The time of rolling of a ship is
a. 4.1s
b. 5.2s
c. 10.4s
d. 14.1s