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Practice Final Exam
• A large rocket engine delivers hydrogen at 1500°C and 3 MPa to a nozzle with an exit pressure equal to the ambient pressure of 54 kPa. If the thrust of the rocket is 2 MN what is the exit velocity and mass flow rate of hydrogen? (use k = 1.41 and R = 4124 J/kgK)
• Air, with a stagnation condition of 450 K and 250 kPa flows through a nozzle. At the location where the cross-sectional area equals 15 cm2 there is a normal shock. If the mass flow rate is 0.4 kg/s estimate the Mach number and the stagnation pressure after the shock.
• A 5-mm capillary tube is used as a viscometer. When the flow rate is 0.71 m3/hr, the measured pressure drop is 375 kPa/m. Estimate the viscosity of the fluid? Is the flow laminar? Can you estimate the density?
• Hydrogen at 20 °C and 1 atm needs to be pumped through an 85 m duct with an aspect ratio of 5:1. The flow rate is 0.7 m3/s and the pressure drop cannot exceed 80 Pa. What should the height and width of the duct be?
The metal niobium has a BCC crystal structure. If the angle of diffraction for the (211) set of planes occurs at 2(theta) =75.99 (first order reflection) when monochromatic x-radiation having a wavelength of 0.1659 nm is used, compute the atomic radi..
2000 kgh of milk is sterilized in a steam infusion sterilizer steam and milk directly contact. the milk is heated to
Determine the minimum value of the force P required to begin moving the block up the incline. Neglect the weight of the wedge.
1000 ft3min of air at 50 degrees fahrenheit dry-bulb and 95 relative humidity are mixed with 1500 ft3min of air at 76
consider a light single-engine airplane such as the piper super cub. if the maximum gross weight of the airplane is
A vertical piston-cylinder device contains a gas at a pressure of 100kPa. The piston has a mass of 5 kg and a diameter of 12 cm. Pressure of the gas is to be increased by placing some weights on the piston. Determine the local atmospheric pressure an..
Determine the mean effective pressure of an ideal Otto cycle that uses air as the working fluid; it's state at the beginning of compression is 13 psia and 56°F; it's temperature at the end of combustion is 1,525°F; and it's compression ratio is 11. U..
a bronze bushing is mounted inside a steel sleeve. knowing that the specific weight of bronze is 0.318 lbin3and of
a flow of liquid glycerine flows around an engine cooling it as it absorbs energy. the glycerine enters the engine at
1. a solid cube of copper with each side 1.0 ft is converted into metallic powders of spherical shape by water
the system on site is a pressure sand filter with a service curve. the filter is backwashed using the feed pump at a
1. if the average density of the sediments in the gulf of mexico is 2.17 gmcc and the water depth at the wellsite is
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