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1. With reference to basic constructional features, contrast the methods of compression employed by positive displacement and dynamic air compressors.
2. An item of plant requires 2 m3 min-t of pulsation-free and oil-free compressed air supplied at a pressure of 7 bar. Select and size a suitable type of machine with regard to output FAD (free air delivered) and quality of air supply.
3. Air is drawn into a compressor at normal temperature and pressure (N.TP.) and compressed to a pressure of 6 bar gauge. After compression the air is delivered at 1.2 m3 min-t and cooled to a temperature of 30°C, at which point condensate is collected at the rate of 2 litres per hour. Estimate the FAD (N.TP.) of the compressor, and the relative humidity of the air entering the compressor.
A circular shaft is subjected to a torque Ta and a bending moment Ma. Assuming that the diameter of the shaft is d, determine the expressions for the principal stresses and maximum shear stress in terms of Ma, Ta and d.
If the filling is done rapidly, calculate the final temperature in the small cylinder, (a) assume that oxygen is an ideal gas with Cv= 5R/2 and (b) using accurate thermodynamic data for oxygen.
A cylindrical specimen of this alloy 24 mm in diameter and 186 mm long is to be pulled in tension. Calculate the force necessary to cause a 0.0119 mm reduction in diameter. Assume a value of 0.33 for Poisson's ratio.
What is the mass of the lead weight, if 100 J of heat is lost from the water after the weight falls a distance of 3 m.
assignment 1 product and engineering design reviewmust contain a brief description of the product then delve into
an open belt drive connects two pulleys 1.2 and 0.5m diameter on parallel shafts 3.6m apart. the belt has a mass of
experiment can be used to investigate heat transfer associated with flow past cylindrical tubes either in isolation or
review the logic used to develop brake systems of the motor vehicle historically. make critical analysis of each phase
What is the discharge revised discharge pressure of the compressor.
The catapult is used to launch a ball such that it strikes the wall of the building at the maximum height of its trajectory. If it takes 1.5 s to travel from A to B, determine the velocity vA at which it was launched, the angle of release q, and t..
Acceleration was uniform. If it assumed that the acceleration was uniform where the magnitute of the volocity of an airplane was changed from 120mph to 360mph in 6 seconds.
Why is it appropriate to take velocity measurements at several diameters downstream of the fan?
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