Which of the following statements about intersystem bonding is correct? a. Intersystem bonding is required at the service equipment but is optional at buildings supplied by a feeder.
b. Intersystem bonding is optional at the service equipment but is required at buildings supplied by a feeder.
c. Intersystem bonding is required at the service equipment and at buildings supplied by a feeder as well.
d. Intersystem bonding is required at the main distribution for mobile home parks but is not required at the disconnecting means at the mobile home.

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

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.

Water at 70°f and streams enter the mixing chamber at the same mass flow rate, determine the temperature and the quality of the exiting stream. 0 psia is heated in a chamber by mixing it with saturated water vapor at 20 psia. if both streams enters the mixing chamber at the same mass flow rate, determine the temperature and the quality of the existing system.