Two identical linkage-and-hydraulic-cylinder systems
controlthe position of the forks of a forklift truck. the
loadsupported by the one system shown is 1500 lbs. knowing thatthe
thickness of member bd is 5/8 inches, determine (a) the
averageshearing stress in the 1/2 inch-diameter pin at b, (b) the
bearingstress at b in member bd.

Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk