Top 350+ Solved Hydraulics and Fluid Mechanics MCQ Questions Answer
Q. When the water level on the downstream side of a weir is above the top surface of a weir, the weir is known as
a. narrow-creasted weir
b. broad-crested weir
c. Ogee weir
d. submerged weir
Q. A manometer is used to measure
a. low pressure
b. moderate pressure
c. high pressure
d. atomospheric pressure
Q. Stoke is the unit of
a. kinematic viscosity in C.G.S. units
b. kinematic viscosity in M.K.S. units
c. dynamic viscosity in M.K.S. units
d. dynamic viscosity in S.I. units
Q. Coefficient of resistance is the ratio of
a. actual velocity of jet at vena contracta to the theoretical velocity
b. area of jet at vena contracta to the area of orifice
c. loss of head in the orifice to the head of water available at the exit of the orifice
d. actual discharge through an orifice to the theoretical discharge
Q. Bulk modulus of a fluid is the ratio of
a. shear stress to shear strain
b. increase in volume to the viscosity of fluid
c. increase in pressure to the volumetric strain
d. critical veloity to the viscosity of fluid
Q. The tangential velocity of the water element having a free vortex is
a. directly proportional to its distance from the centre
b. inversely proportional to its distance from the centre
c. directly proportional to its (distance)2 from the centre
d. inversely proportional to its (distance)2 from the centre
Q. When a cylindrical vessel containing liquid is revolved, the surface of the liquid takes the shape of
a. a triangle
b. a paraboloid
c. an ellipse
d. none of these
Q. The vlow in a pipe is neither laminar nor turbulent when Reynold number is
a. less than 2000
b. between 2000 and 2800
c. more than 2800
d. none of these
Q. When the Mach number is more than 6, the flow is called
a. sub-sonic flow
b. sonic flow
c. super-sonic flow
d. hyper-sonic flow
Q. The metacentric heights of two floating bodies A and B are 1 m and 1.5 m respectively. Select the correct statement.
a. The bodies A and B have equal stability
b. The body A is more stable than body B
c. The body B is more stable than body A
d. The bodies A and B are unstable