
Two U-tube manometers are connected to the same tube as shown in the figure. Determine difference of pressure between and . Take specific gravity of mercury as



Important Questions on Fluid Mechanics


A metallic square plate is suspended from a point as shown in the figure. The plate is made to dip in water such that the level of water is well above that of the plate. The point is then slowly raised at constant velocity. Sketch the variation of tension in string with the displacement of point .


Consider the Venturi tube of figure. Let area equal Suppose the pressure at A is Compute the values of velocity at and velocity at that would make the pressure at equal to zero. Compute the corresponding volume flow rate if the diameter at is (The phenomenon at when falls to nearly zero is known as cavitation. The water vaporizes into small bubbles.)

Water flows through a horizontal tube of variable cross-section (figure). The area of cross-section at and are and respectively. If of water enters per second through find
(i) the speed of the water at
(ii) the speed of the water at and
(iii) the pressure difference

Water flows through a horizontal tube of variable cross-section (figure). The area of cross-section at and are and respectively. If of water enters per second through find
(i) the speed of the water at
(ii) the speed of the water at and
(iii) the pressure difference
Suppose the tube in the previous problem is kept vertical with upward but the other conditions remain the same. The separation between the cross-section at and is . Repeat parts and of the previous problem. Take

Water flows through a horizontal tube of variable cross-section (figure). The area of cross-section at and are and respectively. If of water enters per second through find
(i) the speed of the water at
(ii) the speed of the water at and
(iii) the pressure difference
