Asoil sample was taken from the site of a proposed borrow pit and sent to the laboratory for a standard proctor test (astm d 698). results of the test are as follows: determination number 1 2 3 4 5 dry unit weight (lb/ft3) 107.0 109.8 112.0 111.6 107.3 moisture content (%) 9.1 11.8 14.0 16.5 18.9 plot a moisture content versus dry unit weight curve and determine the soil's maximum dry unit weight and optimum moisture content.

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.