(a) An incompressible liquid flows through a sudden contraction from a pipe of diameter Dl into a pipe of smaller diameter D2. What does the Bernoulli equation predict for P1=P2, the difference between the modified pressures upstream and downstream of the contraction? Does this result agree with experimental observations? (b) Repeat the derivation for the isothermal horizontal flow of an ideal gas through a sudden […]
1.5 kg of liquid having a constant specific heat of 2.5 kJ/kg°C is stirred in a well-insulated chamber causing the temperature to rise by 15°C. Find : (i) Change in internal energy, and (ii) Work done for the process.
. Design a bridge to span a small stream. Assume that rigid supports are available on each bank, 3.0 m apart. The bridge is to be 1.0 m wide and carry a uniformly distributed load of 2.4 kN/m2 over its entire area. Design only the deck boards and beams. Use two or more beams of any size from Appendix A4(b) or others of your own […]
A centrifugal friction clutch has a driving member consisting of a spider carrying four shoes which arekept from contact with the clutch case by means of flat springs until increase of centrifugal forceovercomes the resistance of the springs and the power is transmitted by the friction between the shoesand the case.Determine the necessary mass and size of each shoe if 22.5 kW is to be […]
A hollow shaft has to transmit 6MW at 150rev/min. The maximum allowable stress is not to exceed60 MN/m2 nor the angle of twist 0.3″ per metre length of shafting. If the outside diameter of the shaft is 300 mm findthe minimum thickness of the hollow shaft to satisfy the above conditions. G = 80 GN/m2. [61
a steam turbine is to operate on a simple regenerative cycle. steam is supplied dry saturated at 40 bar , and is exhausted to a condenser at 0.07 bar . the condensate is pumped to a pressure of 3.5 bar at which it is mixed with bleed steam from the turbine at 3.5 bar. the resulting water which is at saturation temperature is then pumped […]
. A natural gas-fired furnace in a textile plant is used to provide steam at 130oC. At times of high demand, the furnace supplies heat to the steam at a rate of 30 MW. The plant also uses up to 6 MW of electrical power purchased from the local power company. The plant management is considering converting the existing process plant into a cogeneration plant […]
Instructions: You are required to write a report following proper format and show all derivation of your solutions. PROBLEM STATEMENT:Consider an automobile traveling over a rough road at a speed of v km/hr. The suspension system has a spring constant of 40 kN/m and a damping ratio of 0.1. The road surface varies sinusoidally with an amplitude of Y= 0.04 m and a wavelength of […]
It is desired to find the cetane number of a fuel oil which has a density of 860 kg/m3 and a midpoint boiling temperature of 229°C. When tested in the standard test engine, the fuel is found to have the same ignition characteristics as a mixture of 23% hexadecane and 77% heptamethylnonane. Calculate: (a) Cetane number of fuel. (b) Percent error if cetane index is […]
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