Mass of proctor mold and base (lb) 9.878 Mass of proctor mold and base compacted soil (lb) 13.360 13.600 13.720 13.840 13.900 13.860 Mass of compacted soil (lb) Moist unit weight (lb/ft3 ) Water contents can label 1 2 3 4 5 6 Mass of can (g) 14.500 14.200 14.900 14.400 14.700 14.800 Mass of wet soil can (g) 45.300 47.500 41.600 46.700 53.900 53.000 Mass of dry soil can (g) 44.300 45.300 39.300 43.100 48.800 47.200 Mass of dry soil (g) Mass of water (g) Water content (%) Dry unit weight (lb/ft3 ) Determine the maxi

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

Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?

Atmospheric air has a temperature (dry bulb) of 80° f and a wet bulb temperature of 60° f when the barometric pressure is 14.696 psia. determine the specific humidity, grains/lb dry air. a. 11.4 c. 55.8 d. 22.5 b. 44.1