Question

a water service line with a pressure of 110 psi will require a
reduced pressure backflow device
expansion tank
extra heavy pipe and fittings
pressure regulator
all of the above
question 46
which of the following has no effect on water pressure and flow?
how smooth the pipe is
what the static pressure is
how fast the valve closes
how much water we are trying to move
how high we are pushing it uphill

Explanation:

For the first question, a water service line with 110 psi pressure is high - pressure. A pressure regulator is needed to reduce the pressure to a safe level for household use. For the second question, static pressure is the pressure when water is not moving and directly affects water pressure and flow. The speed of valve - closing affects water hammer and thus pressure and flow. The amount of water being moved and the elevation change (pushing uphill) also affect pressure and flow. The smoothness of the pipe affects friction and thus flow and pressure. So, there is an error in the second question as all the options have an effect on water pressure and flow.

Answer:

1. D. pressure regulator
2. (There is no correct option as all affect water pressure and flow)