An unpeened helical compression spring made of oil tempered steel wire of diameter 0.15-in and mean coil diameter of 0.825-in. If the spring is preloaded with a compressive force of 5lb, determine the maximum compressive load the spring can carry if fatigue is to be estimated using Goodman criterion and Zimmerli data.

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

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.

Inspection for bearing condition will include: (clo4) a)-color b)-smell c)-size d)-none of the above