Acertain centrifugal pump with a 12 inch diameter impeller generates a head increase of 60 ft at a flow rate of 3200 gpm while consuming 60 hp. if the impeller is changed to one with a 10 inch diameter what is the new flow rate, head increase, and power consumption if the pump speed remains constant? (2667 gpm, 41.7 ft)

The higher the astm grain size number, the finer the gran is. a)-true b)-false

Which one from below is not one of the reasons of planning failures? (clo3) a)-planner is careless. b-planner spend less time in the field but more time on the desk c)-planner is not qualified d)-planner does not have sufficient time to properly plan

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.