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Draw neat iron – iron carbide equilibrium diagram and indicate phases clearly.
a) Explain various invariant reactions with help of microstructures.
b) Consider a hypo eutectoid steel (C0 = 0.012 + 0.78 [X/106]) and hyper eutectoid steel ((C0 = 0.78 + 0.012 [X/106]) compositions and estimate pro-eutectoid phase fractions, for the given compositions.
c)Also estimate compositions of ferrite, Fe3C and phase fractions just below eutectoid temperature.
Note: Also calculate your compositions from the given equation (X is your sl. number) and indicate it. For each subsections (a,b,c) please draw a separate Fe-Fe3C diagram.
3 kmol of gas A and 4 kmol of gas B are held in separate but equal volume containers. When they are mixed in a new container, again of equal volume the pressure reading is 10 bar. What is the partial pressure of A?
The crankpin of an engine sustains a maximum load of 35 kN due to steam pressure. If the allowable
bearing pressure is 7 N/mm2
, find the dimensions of the pin. Assume the length of the pin equal to 1.2
times the diameter of the pin.
The crankpin of an engine sustains a maximum load of 35 kN due to steam pressure. If the allowable
bearing pressure is 7 N/mm2
, find the dimensions of the pin. Assume the length of the pin equal to 1.2
times the diameter of the pin.
Three balanced Y-connected loads are installed on a balanced three-phase four-wire system. Load 1 draws a total power of 6 kW at unity PF, load 2 pulls 10 kVA at PF 0.96 lagging, and load 3 demands 7 kW at 0.85 lagging. If the phase voltage at the loads is 135 V, if each line has a resistance of 0.1 , and if the neutral has a resistance of 1 , find (a) the total power drawn by the loads; (b) the combined PF of the loads; (c) the total power lost in the four lines; (d) the phase voltage at the source; (e) the power factor at which the source is operating.
A surface condenser for a non reheat turbine exhausts 6 kg/sec of steam at 6.8 KPaa (tsat = 38.5C) with circulating water entering at 27C and a terminal temperature difference 4C. Overall coefficient of heat transfer is 3.6 KW/m2-C and water velocity is assumed to be 2.13 m/sec. Tube type ¾ in 18 BWG (OD = 17 mm; t = 1.3 mm). Tube sheet thickness is 12 mm. Assuming two tube passes design and 2210 KJ/kg of heat rejection, determine the actual length and total number of tubes required by the condenser.
Give one real-life example in Computers of Deadlock and how to prevent it from occurring?
