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Oil is transported through a pipeline by a series of pumps that can produce a pressure of 10 MPa in the oil leaving each pump. The losses in the pipeline cause a pressure drop of 600 kPa each kilometer. What is the maximum possible spacing of the pumps
At a section where the diameter is 4 in, methane flows with the velocity of 50ft/s and a pressure of 85 psia. At a downstream section, where the diameter has increased to 6 in, the pressure is 45 psia. Assuming the flow to be isothermal, compute the ..
Give two advantages of preheating the water in this way and one disadvantage and give two reasons why the presence of any sulphur in the fuel mix would be undesirable.
pin p is constrained to move along the curve defined by the lemniscate r 4 sin 2theta ft. if the angular position of
A heat pump uses refrigerant-134a as the working fluid in an ideal vapour-compression refrigeration cycle between 0.14 and 0.8 MPa. The refrigerant leaves the compressor at a temperature of 40° C. Determine the pressure, temperature and enthalpy a..
a friction less piston-cylinder device initially contains 50 l of saturated liquid refrigerant-134a. the piston is free
State the definition of the Z transform.
A copper wire, 5 mm in diameter and 15 ft long, has a voltage drop of 0.6 volts. Find the maximum temperature in the wire if the ambient air temperature is 25°C and the heat transfer coefficient h is 5.7 Btu/hr · ft2 · F.
Make a full-size sketch of the equivalent gears showing two teeth in contact as in Fig. 6.7b.
If the district heating system should supply hot water at 900C, what is the lowest possible condenser pressure with water as the working sub-stance?
limestone blocks approximately 8 in. wide by 14 in. long by 6 in. high are sometimes used in constructing dry stacked
air at one atmospheric pressure and at 20degc flows across a 12 mm diameter sphere witha free stream velocity of 5 ms.
air at 1 bar and 20 degrees c is compressed isentropically to 20 bar pressure. for both a and b assume that air is an
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