A brittle material has the properties Sut = 30 kpsi and Suc = 90 kpsi. Using the brittle Coulomb-Mohr and modified-Mohr theories, determine the factor of safety for the following states of plane stress. (a) σx = 25 kpsi, σy = 15 kpsi (b) σx = 15 kpsi, σy = –15 kpsi (c) σx = 20 kpsi, τxy = –10 kpsi (d) σx = –15 kpsi, σy = 10 kpsi, τxy = –15 kpsi (e) σx = –20 kpsi, σy = –20 kpsi, τxy = –15 kpsi

When at a point two solid phase changes to one solid phase on cooling then it is known as a) eutectoid point b) eutectic point c) peritectic point d) peritectoid point

Line joining liquid phase with liquid and solid phase mixture is known as: a) liquidus b) solidus c) tie line d) none of the mentioned

Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.