Chapter 10 Multiple choice

At the point where 1/2'' lavatory fixture branch joins a 3/4'' urinal fixture branch pipe, the demand increases to 14 cwsfu and the pipe increases to ___'' size. A. 1 B. 1 1/4 C. 1 1/2 D 1 3/4

A. 1

Flow pressure is determined by subtracting the pressure loss due to friction and pressure loss due to ___ from the available pressure. A. head B. leakage C. fixture use D. wear

A. head

Plumbing systems for residential structures are generally designed by ___ A. plumbers B. mechanical engineers C. structural engineers D. hydromechanical engineers

A. plumbers

When the cold water supply fixture unit demand increases to 51 cwsfu, the water supply and water meter sizes for water supply systems table indicates that the cold water main should increase to ___'' pipe at this point. A. 1 B. 1 1/4 C. 1 1/2 D. 2

B. 1 1/4

The fixture supply pipe for women's restroom lavatories, rated at 2 cwsfu each, is ___'' size A. 1/4 B. 1/2 C. 3/4 D. 1

B. 1/2

The kitchen and service sinks, rates at 4 hwsfu each, are sized ___'' fixture supply pipe A. 1/4 B. 1/2 C. 3/4 D. none of the above

B. 1/2

Water in street water mains is typically under a pressure of ___ psi to ___ psi which is adequate to serve a moderate-size plumbing installation. A. 45; 50 B. 45; 60 C. 50; 60 D. 50; 65

B. 45;60

Pressure loss due to head is subtracted from the ___ to determine whether there is adequate pressure to raise the water to the required height. A. total pressure B. available pressure C. wsfu D. cwsfu

B. available pressure

Flow pressure ranges from 8 psi for faucets and tank-type water closets to ___ psi for certain models of flushometer valves. A. 18 B. 22 C. 25 D. 27

C. 25

The sillcock must be supplied by a ___'' branch pipe, as sized from the minimum sizes of fixture branch pipe table A. 1/4 B. 1/2 C. 3/4 D. 1 1/2

C. 3/4

Water pressure within a building must never be allowed to exceed ___ psi A. 60 B. 70 C. 80 D. 90

C. 80

A water supply ___ is a measure of the estimated water demand of a plumbing fixture. A. estimate B. demand C. fixture unit D. rate

C. fixture unit

A 3/4' ball valve is installed before the branch pipe passes through the dwelling wall so that water flow can be shut off ___ A. if the sillcock must be repaired B. during winter months to avoid freezing C. if the sillcock must be replaced D. all of the above

D. all of the above

___ is (are) used to convey water to fixtures A. galvanized pipe B. copper tube C. pvc, cpvc, and pex plastic pipe D. all of the above

D. all of the above

The ___ is the only factor that can be affected by a plumber when installing a plumbing system. A. number of fixtures B. size of piping C. type of fittings D. length of piping

D. length of piping