A mercury-water manometer has a gage difference of 0.7 m (difference in elevation of menisci). The difference in pressure measured in metres of water is
A.0.7
B.9.52
C.8.82
D.9.17
Category: Fluid Mechanics and Solid Handling Mcqs
A mercury (? = 13.6 ?water) barometer has a column height of 29 in. The barometric pressure in psi is
A.14.696
B.14.24
C.0.23
D.not determinable from data given
Select the three pressures that are not equivalent
A.14.696 psi 29.92 in. Hg 33.94 ft H2O
B.14.696 psi 29.92 in. Hg 1.01325 bar
C.29.92 in Hg 33.94 ft H2O 1.01325 x 105 N/m2
D.29.92 in Hg 2116 psf 1.01325 Pa.
Vapour pressure of a liquid is due to
A.the existence of free surface
B.the fluid pressure
C.the pressure of air above the free surface
D.the molecules of liquid which hang over the free surface
The viscosity of a liquid
A.remains unaffected with change in temperature
B.decreases with increase in temperature
C.increases with increase in temperature
D.is dependent on pressure only
The total energy grade line in pipe flow is a graphical representation of Bernoullis equation and represents the sum of elevation head pressure head and velocity head measured above
A.the centre line of pipe
B.the top of the pipeline
C.the bottom of the pipeline
D.the arbitrary horizontal datum
Viscosity has the dimensions
A.FL-2T-1
B.F-1L2T-1
C.FL-2T
D.F-1L2T where dimensions M L and T are used for force length and time.
The capillary rise or depression in a small diameter tube is
A.directly proportional to the surface tension
B.inversely proportional to the surface tension
C.directly proportional to the diameter of the tube
D.inversely proportional to the diameter of the tube
How deep can a diver descend in ocean water (?=64 lbf/ft3) without damaging his watch which willwithstand an absolute pressure of 80 lbf/in2?
A.146.9 ft
B.180 ft
C.1.02 ft
D.1.25 ft
