Using the Mohr’s circle constructed for the given state of plane stress, draw the radial line which corresponds to a state of stress associated with the x plane on an element oriented 30∘ counterclockwise from the original position. Draw the radial line which corresponds to the state of stress on an element oriented 30∘ counterclockwise from the original position.

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented

Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.05 ka/s and leaves at 0.8 mpa and 50°c. the refrigerant is cooied in the condenser to 0.72 mpa and 26'c. it is then throttled to 0.15 mpa. sketch the t-s diagram for the system and evaluate: 6) the rate of heat removai from the refrigerated space (kw), it) the power input to the compressor (kw), ii) the isentropic efficiency of the compressor (%), and iv) the cop of the refrigerator.