A highway construction project is being undertaken to reduce crash rates. The reconstruction involves a major realignment of the highway such that a 65 mi/h design speed is attained. At one point on the highway, a 800 ft equal tangent crest vertical curve exists. Measurements show that at 4+50 station from PVC, the vertical curve offset is 4 ft. Assess the adequacy of this existing curve in light of the reconstruction design speed of 65 mi/h, and if the existing curve is inadequate, compute a satisfactory curve length.

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.

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false

Abrake has a normal braking torque of 2.8 kip in and heat-dissipating cast-iron surfaces whose mass is 40 lbm. suppose a load is brought to rest in 8.0 s from an initial angular speed of 1600 rev/min using the normal braking torque; estimate the temperature rise of the heat dissipating surfaces.