Engineering Answers

A vertical storage tank initially contains water (ρ=1000kg/m3) at a depth of 4m. Immiscible oil with a specific gravity of 0.88 is added until the total liquid height is 10m. If the barometer pressure is 97.2kPa and g=9.80m/s2, determine the

absolute pressure at the bottom of the water, in kPa and bars.

Answer the two questions below, in your opinion

1. Give one real-life example of Deadlock in Computers

2. How to prevent it from occurring?

You are expected to evaluate the process to determine the operating conditions that will produce a maximum profit under the set constraints discussed in Section 1. You are to determine the operating temperature, pressure, and steam to ethyl-benzene ratio. There are many cases to be evaluated. You should report the profit (or loss) for each case examined and provide stream tables for the best operating conditions found.

A submarine is cruising at a depth of 280 m in seawater with a specific gravity of 1.03. If the inside of the submarine is

pressurized to standard atmospheric, determine the pressure difference across the hull in (a) kPa, (b) bars. The average local gravity is 9.70m/s2.

A pilot notices that the barometer pressure outside his aircraft is 800 mbars. The airport below the plane reports a barometric pressure of 1020 mbar. If the air density averages

1.15 kg/m3 and the local gravity is 9.70 m/s2, determine the height of the aircraft above the ground, in meters.

What is the basic advantage of using interrupt-initiated data transfer over transfer under

program control without an interrupt?

Why are the read and write control lines in a DMA controller bidirectional? Under what

condition and for what purpose are they used as inputs? Under what condition and for what

purpose are they used as outputs?

. a vertical rectangular gate, 6 m high and 4m wide , has water on one side to a

depth of 3 m and a liquid of specific gravity 0.85 to a depth of 2m on other side

.what is pressure on water side & what is pressure on other liquid side of sp. gr.

0.85

1. 10 m3 of mercury weights 136×104 N. calculate its specific weight, mass

density, specific gravity.

compressed air vessel has an inside diameter of 2 m and a plate thickness of

12,5 mm. If the tensile stress induced in the plating is to be limited to 100

MPa, calculate for both the longitudinal and circumferential seams the pressure

necessary to induce this stress. Take the longitudinal and circumferential

joint efficiencies as 80 % and 50 % respectively. What would the actual

allowable pressure be?