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Mechanical Engineering
Freon 12 is contained in a sealed glass container at 50°C. As it is cooled, vapor droplets arc noted condensing on the sidewalls at 20°C. Find the original pressure in the container. Arts. 650 kPa
Mechanical Engineering
A rigid vessel contains water at 400°F. Heat is to be added so that the water passes through the critical point. What should the quality be at the temperature of 400"F? Am. 0.01728
Mechanical Engineering
Steam with a quality of 0.85 is contained in a rigid vessel at a pressure of 200 kPa. Heat is then added until the temperature reaches (a)400 "C and (b)140 "C. Determine the final pressures. Ans. (a) 415 kPa (h)269 kPa
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Mechanical Engineering
A rigid vessel with a volume of 10 m3 contains a water-vapor mixture at 400 kPa. If the quality is 60 percent, find the mass. The pressure is lowered to 300 kPa by cooling the vessel; find mKand m,. Am. 35.98 kg. 16.47 kg, 19.51 kg
Mechanical Engineering
Two kg of saturated water at 125 kPa is completely vaporized. Calculate the volume (a)before and (b) after. Ans. (a)0.002 m3 (b)2.76 m3
Mechanical Engineering
Determine the final volume of a mixture of water and steam if 3 kg of water is heated at a constant pressure until the quality is 60 percent. The pressure is (a)25 kPa and (b)270 kPa.
Ans. (a) 11.6 mZ (h)1.24 m3
Ans. (a) 11.6 mZ (h)1.24 m3
Mechanical Engineering
For a stub tooth spur gear with 20 teeth, a face width of 55 mm, a module of 5 mm, and a material with an endurance strength of 220 MPa, what is
the allowable endurance load?
Which are the following answers?!
A: 23.758.29 N
B: 38.773.54 N
C: 5.244.00 N
D: 47.516.59 N
E:19.386.77 N
the allowable endurance load?
Which are the following answers?!
A: 23.758.29 N
B: 38.773.54 N
C: 5.244.00 N
D: 47.516.59 N
E:19.386.77 N
Mechanical Engineering
A uniaxial steel bar is initially 250mm in length with a square cross-section of 50mm x 50mm. The modulus of elasticity is 200 GPa and a poisson's ratio is 0.32 Determine the change in dimensions of the bar when carrying tensile load of 600kn.
Mechanical Engineering
Five kilograms of steam occupies a volume of 10m^3. Find the quality and the pressure if the temperature is measured at (a) 40oC and (b) 860C.
ANS: (a) 0.1024, 7.383 kPa (b) 0.7312, 60.3 kPa
ANS: (a) 0.1024, 7.383 kPa (b) 0.7312, 60.3 kPa
Mechanical Engineering
Consider the same plate as in the previous question: a square plate of L=1
m side attached to a torsionnal spring of stiffness 10Nm/rad. The mass of the plate is M=1
Kg. Now the air flow is coming from the left at 10m/s. What is the eigenfrequency (Hz) of this oscillator
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#339914 on Dec 2023
#339914 on Dec 2023