The following figure shows the tensile stress-strain curve for a brass alloy. (a) What is this alloy's tensile strength?
(A) 650MPa (B) 285MPa (C) 515MPa (D) 3,000MPa

(b) What is its modulus of elasticity?
(A) 75GPa (B) 110GPa (C) 45GPa (D) 215GPa

(c) What is the yield strength?
(A) 465MPa (B) 400MPa (C) 285MPa (D) 500MPa

Give heat transfer applications for the following, (i) gas turbines (propulsion) ) gas turbines (power generation). (iii) steam turbines. (iv) combined heat and power (chp). (v) automotive engines

An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature

Compute the pressure drop of 30°c air flowing with a mean velocity of 8 m/s in a circular sheet-metal duct 300 mm in diameter and 15 m long. use a friction factor, f 0.02, and pair = 1.1644 kg/m a. 37.26 pa b. 25.27 pa n c. 29.34 pa d. 30.52 pa