he following applies to the next five questions, which concern a bolted tension joint. Further data will be supplied as necessary: stiffness coefficient of the joint 0.237 nominal fastener diameter 20 mm Tensile stress area 245 mm2 Proof strength 380 MPa Pre-load 51.2 kN Find the external load that would just cause joint separation.

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.