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Mechanical Engineering
B. The pressure in a steam main is 12 bar. A sample of steam is drawn off and passed through a throttling calorimeter, the pressure and temperature at exit from the calometer being 1 bar and 140 degree C respectively. Calculate the dryness fraction of the steam in the main, stating any assumptions made in the throttling process.
Mechanical Engineering
- Calculate the internal energy and enthalpy of 1 kg of air occuping 0.05 m (cubic) at 20 bar. If the internal energy is increased by 120 kJ as the air is compressed to 50 bar, calculate the new volume, Cp and Cv.
Mechanical Engineering
Write an algorithm to check if a student is eligible for sitting in ETE or not. If students attendance <75 and CA<40 he is not allowed to take ETE else he is allowed. Ask user to enter his attendance and CA marks.
Mechanical Engineering
0.5 kg of air is taken through a constant pressure cycle. At the beginning of
adiabatic compression are 96.5 kN/m 2 and 15 0 C. The pressure ratio of
compression is 6. Constant pressure heat addition occurs after adiabatic
compression until the volume is doubled. Take γ = 1.4 and R= 0.289 kJ/kg K.
Determine for the cycle:
(a) The pressure, volume and temperature at cycle state points. (b) The heat received.
(c) The thermal efficiency. (d) The work ratio.
(e) The heat rejected.
adiabatic compression are 96.5 kN/m 2 and 15 0 C. The pressure ratio of
compression is 6. Constant pressure heat addition occurs after adiabatic
compression until the volume is doubled. Take γ = 1.4 and R= 0.289 kJ/kg K.
Determine for the cycle:
(a) The pressure, volume and temperature at cycle state points. (b) The heat received.
(c) The thermal efficiency. (d) The work ratio.
(e) The heat rejected.
Mechanical Engineering
Define graphical method of truss analysis?
Mechanical Engineering
A rod 2m long and of diameter 30mm is subjected to an axial pull of 30kN. If the young’s
modulus of the material of the rod is 2x105 N/mm2
, determine
a) stress
b) strain and
c) Elongation
modulus of the material of the rod is 2x105 N/mm2
, determine
a) stress
b) strain and
c) Elongation
Mechanical Engineering
Two systems have the following equations of state, where R is the gas constant per mole. The mole numbers are N1 = 3 and N2 = 5. The initial temperatures are T1 = 175 K and T2 = 400 K. What is the temperature once equilibrium is reached (in Kelvin)?
1/T1=3/2×R×N1/U1
1/T2=5/2×R×N2/U2
Mechanical Engineering
A piston cylinder device contains 0.2 kg of water initially at 800 kPa and 0.06 m3. Now 200 kJ of heat is transferred to the water while its pressure is held constant. Determine the final temperature of the water. Also, show the process on a T-V diagram with respect to saturation lines.
[ 721.1oC]
[ 721.1oC]
Mechanical Engineering
Two systems have the following equations of state, where R is the gas constant per mole. The mole numbers are N1 = 3 and N2 = 5. The initial temperatures are T1 = 175 K and T2 = 400 K. What is the temperature once equilibrium is reached (in Kelvin)?
Mechanical Engineering
A wagon of mass 50 tones, starts from rest and travels 30 meters down a 2% grade and strikes a post with bumper spring as shown in Figure below. If the rolling resistance of the track is 60 N/t, find the velocity with which the wagon strikes the post. Also find the amount by which the spring will be compressed, if the bumper spring compresses 2 mm per 30 kN force.
