Page 29 - BASIC CONCEPTUAL OF THERMOFLUID

CHAPTER 2: FLUID APPLICATION

TUTORIALS

1. Assume standard atmospheric conditions. Determine the pressure in kN/m2 for the pressure below:
i. depth 6m below under free space water.
ii. At the 9m under surface of oil with specific gravity 0.75.

Answer:
(58.86kN/m2 ,66.0 kN/m²)

2. Find the height of water column, h which is equivalent to the pressure, p of 20 N/m². Take into
consideration specific weight of water, ω is 1000 kg/m2 x 9.81 m/s².

Answer:
(0.00203m)

3. Two cylinders with pistons are connected by a pipe containing water. Their diameters are 75 mm and
600 mm respectively and the face of the smaller piston is 6 m above the larger. What force on the smaller
piston is required to maintain a load of 3500 kg on the larger piston?

Answer:
(275.970 N)

4. A hydraulic press has a diameter ratio between the two pistons of 8:1. The diameter of the larger piston
is 600 mm and it is required to support a mass of 3500 kg. the press is filled with a hydraulic fluid of specific
gravity 0.8. Calculate the force required on the smaller piston to provide the required force:

i. When the two pistons are at same level
ii. When the smaller piston is 2.6 m below the larger piston.

Answer:
(536.48 N, 627.92 N)

5. An area of big piston in hydraulic jack is three times bigger than the area of small piston. The small
diameter is 630 mm and is used to support a weight of 40 KN. Find the force which is needed to rise up the
big piston 2 m above the small piston. Given the specific gravity of oil is 0.85.

Answer:
(101.6kN)

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