Question | 9 kN/m 6kN/m 6kN/m 1,5m 3m 1,5m Determine the reactions at support A and B.

(4) Determine the maximum and minimum normal stress in the bracket at section a-a when the load is applied at x = 0, and when the load is applied at x = 350 mm (20 marks) 100 KN 15 mm 15 mm 200 min 150 Fig.4

1.6 kg/s of sand-salt mixture containing 62.5% sand is leached in a counter current unit, the amount of solution is O 0 kg/s O 0.6 kg/s O 37.5 kg/s

+ 7 1 -1,2 5 6. a. Determine parametric equations for each of the following lines: x + 6 = y - 10 = 3 - 7 1 277 -1 1 2 and * †? = =,", z = 5 b. Determine the angle between the two lines. 7. Show that the following two sets of symmetric equations represent the same straight line: * $ 7 == ?-? and ? -4 = 9=;" =23 x + y +1 2 5 x1y- 8 2 1

dr Let A be the area of a circle with radius r. If 5, find dA when r = 5. dt dt Answer:

Question 2 (Leaching): A vegetable seed material, containing 0.4 kg oil/1 kg insoluble solid, is leached with pure hydrocarbon solvent in order to recover 80% of the oil in a counter-current multistage leaching unit. It is found that the underflow varies with concentration in each classifier as shown in the figure below. What will be the required number of thickeners if 0.5 kg of hydrocarbon solvent is used/1 kg of inert solid? 0.42 0.4 0.38 kg solution/hr, W 0.36 0.34 0.32 0.3 0 0.05 0.1 0.4 0.45 0.5 0.15 0.2 0.25 0.3 0.35 kg solute/kg solution, X

Question 2 (Leaching): A vegetable seed material, containing 0.4 kg oil/1 kg insoluble solid, is leached with pure hydrocarbon solvent in order to recover 80% of the oil in a counter-current multistage leaching unit. It is found that the underflow varies with concentration in each classifier as shown in the figure below. What will be the required number of thickeners if 0.5 kg of hydrocarbon solvent is used/1 kg of inert solid? 0.42 0.4 0.38 kg solution/hr, W 0.36 0.34 0.32 0.3 0 0.05 0.1 0.4 0.45 0.5 0.15 0.2 0.25 0.3 0.35 kg solute/kg solution X