Name: Date: FLUID MECHANICS (Quiz #2)

INSTRUCTIONS: SHOW YOUR COMPLETE SOLUTION AND BOX YOUR FINAL ANSWER. 1. A pressure gage 6m above the bottom of the tank containing a liquid reads 90kPa. Another gage located 4m above the bottom reads 103kPa. Determine the specific weight of the liquid. (5 pts)2. In the figure shown (Figure 2), if the atmospheric pressure is 101.03KPa and the absolute pressure at the bottom of the tank is 231.3KPa, what is the specific gravity of olive oil? (5 pts)3. Assuming specific weight of air to be constant at 12 N/m3, what is the approximate height of Mount Banahaw if a mercury barometer at the base of the mountain reads 654mm and at the same instant, another barometer at the top of the mountain reads 480mm. (5 pts)4. For a gage reading of -17.1kPa (Figure 4), determine the following: (10 pts)a. Elevation of the liquid in the open piezometer Eb. Elevation of the liquid in the open piezometer Fc. Elevation of the liquid in the open piezometer Gd. Deflection of the mercury in the U-tube manometer neglecting the weight of air.5. For the manometer set-up shown (Figure 5), determine the difference in pressure between A & B. (5 pts)6. An inclined circular gate (Figure 6) with water on one side. Determine the total resultant force acting on the gate. (5 pts)

Bonus Problem: (5pts)A vertical rectangular gate is 2m wide, 6m high is hinged at the top, has oil (s=0.84) standing 7m deep on one side, the liquid surface being under pressure of -18.46kPa. Compute the hydrostatic force acting on the gate.

FIGURE 5

FIGURE 2

FIGURE 4

FIGURE 6