Engineering Answers

4. What is the pressure (psia) at the base of a 8 ft liquid column with atmospheric pressure 755 mm Hg, if

the fluid is a) water, b) glycerin (SG = 1.25), c) Oil (SG = 0.750)

3. If the barometric pressure is 29.75 in Hg,convert (a) 27 psia to kPag, b) 24 in Hg vacuum to psia, c) 12

psia to mm Hg vacuum, d) 14 in Hg gage to kPaa.

2. Two liquids of different densities (ρ 1 = 1550 kg m /m 3 and ρ 2 = 550 kg m /m 3 ) are poured together in a

cylindrical container 0.5 m in diameter x 1 m height. If the resulting density of the mixture is 850 kg m m 3 ,

determine a) the mass of each liquid inside the tank (kg m ), b) the weight of the mixture in kg f if g = 9.79

m/s 2 .

1. The weight of a piece of metal is 225 lb f at a location where gravitational acceleration is 31 ft/s 2 . Find the weight of the metal in lb f and the mass of the metal in lb m if it will be placed on the surface of the moon where g is 5.5 ft/s 2 .

Background A villager in South Africa has an inhabitant of five hundred people. It is 200 km from the nearest Eskom substation based on line of sight. Presently, the only source of electric power in the village is diesel generator. Due to Covid-19, the company that used to maintain the generator has folded up, consequently, the villagers have no electricity. Aim Design a standalone (off grid) Photovoltaic (PV) system with special reference to the village in South Africa with the following PV panel generation factors: Group Number PV panel generation factor of 7.Please refer to the table below for the aspects that need to be covered on the project. Item Description 1 Project aim 2 Project theoretical background 3 Project problem statement 4 Specifications (material to be used for the project) 14 Project layout (block diagram) 15 Recommendations 16 Conclusion

Initial setting time of cement for asbestos cement products should be not less than

A.30 minutesB.50 minutesC.75 minutesD.90 minutes.

For melting one tonne of cast iron

A.700 m³ air is required

B.20 kg limestone is required

C.one quintal coke is required

D.all the above.