文档介绍：英文习题
1. A pump delivers water against a head of l5m of also raises the water from a reservoir to the pump against a suction head equal to 250mm of mercury. Convert these heads into N/m2 and find the total head against which the pump works in N/m2 and in metres of water.
(147kN/m2, , , )
cylinders with pistons are connected by a pipe containing water. Their diameters are 75mm and 600mm and the face of the smaller piston is 6m above the larger. What force on the smaller piston is required to maintain a load of 3500kg on the larger piston?
(276N)
is the atmospheric pressure in N/m2 if the barometer reading is 750mm of mercury? What would be the height of the column of water required to produce this pressure? (105N/m2, )
the foot of a mountain a mercury barometer reads 740mm and a similar barometer at the top of the mountain reads 590mm. What is the approximate height of the mountain, assuming that the density of air is constant and equal to ? (1670m)
Fig. 1 fluid A is water and fluid B is mercury (sp. . 6). What Will be the difference in level h. if the pressure at X is 140kN/mz and a= ?
Fig. 1. fluid A is oil (. ) , flaid B is brine (sp. ). If a=2. 5 m and h= what are (a) the pressure head, and (b)the pressure in N/m2 at X? (- of oil, - gaug)
7. Assuming that the atmospheric pressure is find the absolute pressure at X in -2 when(a) Fluid A is water, fluid B is mercury (),a=lm and h=,(b) Fluid A is oil (sp. ), fluid B is brine (), a=20cm and h=55cm.
((a), (b))
oil and mercury manometer consists of a U-tube 5mm diam with both limbs vertical. The right-hand limb is enlarged at its upper end to
25mm diam. The enlarged end contains oil with its free surface in the enlarged portion and the surface of separation between mercury and oil is below the enlarged end. The left-han