1. A truck with heaped capacity of 10 cy is used to disposed to excavated material at dumpsite of 5 miles from the job site. The average velocity of the is 30 mph. The dump time is 30 second and load time is 50 second. Determine the production capacity of the dump truck.

Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.