Figure 3 illustrates the stress-strain diagram for tensile test of four (4) different materials and labelled as A, B, C and D. Each tested sample is 10 mm in diameter with a gauge
length of 50 mm. From the diagram,
i)
) Identify the material with the largest modulus of elasticity and state its value.
[2 Marks]
ii) Identify the material with the maximum ultimate tensile strength and state its value.
[2 Marks]
iii) Identify the material with the highest failure strength and state its value.
[2 Marks)
iv) Identify the material with the lowest yield strength and state its value.
[2 Marks]
v) Predict the suitable material among A, B, C and D for the used in construction.
Give TWO (2) reasons.
[2 Marks)

An ideal rankine cycle with reheat uses water as the working fluid. the conditions at the inlet to the high pressure turbine are 10mpa, 650°c and the steam is reheated at a constant pressure of 1.4mpa before entering the low pressure turbine. for a condenser pressure of 10kpa, plot the cycle thermal efficiency and quality of steam at the low pressure turbine exit versus reheat temperatures (the temp of steam entering the low pressure turbine) of 400, 500, and 600°c. draw the t-s diagram and show all your work for a reheat temperature of 400°c .note, there will be two plots. one with thermal efficiency on in the ordinate versus reheat temperate and the other will have quality on the ordinate versus reheat temperature. be sure to label all axes with variables and units and include title. the plots must be done on computer.