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0
Q
1. Required capacity at fixture supply pipe outlets: flow rate in gpm and flow pressure in psi:
Bathtub, no shower - 
Bathtub with anti-scold protection - 
Bidet - 
Combination fixture - 
Dishwasher, residential - 
Drinking fountain - 
Laundry tray - 
Lavatory - 
Lavatory (self closing) - 
Lavatory (sensor) -
Shower - 
Shower, balanced-pressure, thermostatic or combination balanced-pressure/thermostatic mixing valve -
Sill-cock, hose bib - 
Sink, residential - 
Sink, service - 
Urinal, valve - 
Water closet, blow out, flushometer valve - 
Water closet, flushometer tank - 
Water closet, siphonic, flushometer valve - 
Water closet, tank, close coupled - 
Water closet, tank, one piece -
A

Bathtub, no shower - 4 gpm, 20 psi.
Bathtub with anti-scold protection - 4 gpm, 20 psi.
Bidet - 1.5 gpm, 20 psi.
Combination fixture - 4 gpm, 8 psi.
Dishwasher, residential - 2.75 gpm, 8 psi.
Drinking fountain - 0.75 gpm. 8psi.
Laundry tray - 4 gpm. 8psi.
Lavatory - 2 gpm, 8 psi.
Lavatory (self closing) - 2 gpm, 20 psi.
Lavatory (sensor) -2 gpm , 20 psi.
Shower - 3 gpm, 8 psi.
Shower, balanced-pressure, thermostatic or combination balanced-pressure/thermostatic mixing valve -3 gpm, 20 psi.
Sill-cock, hose bib - 5 gpm, 8 psi.
Sink, residential - 2.5 gpm, 8 psi.
Sink, service - 3 gpm, 8 psi.
Urinal, valve - 18 gpm, 20 psi.
Water closet, blow out, flushometer valve - 25 gpm. 25 psi.
Water closet, flushometer tank - 3 gpm, 20 psi.
Water closet, siphonic, flushometer valve - 25 gpm, 25 psi.
Water closet, tank, close coupled - 3 gpm, 15 psi.
Water closet, tank, one piece -3 gpm, 20 psi.

1
Q
2. Maximum flow rates and consumption for plumbing fixtures and fixtures fittings:
Lavatory, private - 
Lavatory, public, (self closing) - 
Shower head - 
Sink faucet -  
Urinal - 
Water closet -
A

Lavatory, private - 1.5 gpm at 60 psi.
Lavatory, public, (self closing) - 0.25 gallon per metering cycle.
Shower head - 2.0 gpm at 80 psi.
Sink faucet - 2.2 gpm at 60 psi.
Urinal - 0.5 gallon per flushing cycle.
Water closet -1.28 gallons per flushing cycle or equivalent dual flush

2
Q
3. Minimum sizes of fixture water supply pipes:
3/8" - 
1/2" - 
3/4" - 
1" -
A

3/8” - Water closet (flushometer tank), Water closet (flush tank), Lavatory, Drinking fountain, Bidet.
1/2” - Bathtubs, Combination sink and tray, Dishwasher (domestic), hose bibs, Kitchen sink; Laundry, 1,2 or 3 compartment,; Shower (single head). Sink (service), Urinal (flush tank), Urinal (flush valve), Wall hydrant.
3/4” - Sink flushing rim).
1” - Water closet flush valves).

3
Q
4. Manifold sizing (maximum demand in gpm at velocity 4 fps and 8 fps):
1/2" - 
3/4" - 
1" -
1-1/4" - 
1-1/2" -
A
1/2" - 2 - 5.
3/4" - 6 - 11.
1" - 10  - 20.
1-1/4" - 15 - 31.
1-1/2" - 22 - 44.
4
Q
  1. Give an objection for oversized hot water supply pipelines that does not apply to cold water supply lines.
A

With oversized hot water piping, more water be drawn and washed before the hot water reaches the fixture.

5
Q
  1. What method of heat transfer is used in a gravity domestic hot water circulation system?
A

Convention. Currents are created due to the difference in weight of water at different temperatures.

6
Q
  1. Under what conditions may a flushing be required in connection with the installation of a water pipe?
A

A Water pipe running through a roof or deck for a hose connection would require a flushing. In some installations when exposed water pipes extend through a floor in a building, a flushing is required around the pipe at the floor line to prevent water from seeping to the floor below.

7
Q
  1. Cold and hot water house piping system. (Roof tank).
A

See figure 20.

8
Q
  1. Hydro pneumatic water system.
A

Se figure 19.

9
Q
  1. Size of overflows for gravity and suction tanks.
    Overflow pipe size (inches) - Maximum allowable GPM for each orifice opening into tank - Maximum allowable GPM for vertical overflow (piping connecting orifices).
A
2 - 19 - 25
3 - 43 - 75
4 - 90 - 163
5 - 159 - 296
6 - 257 - 472
8 - 505 - 1,020
10 - 890 - 1,870
12 - 1,400 - 2,967
10
Q
  1. Vent for roof tank?
A

The cover of gravity tanks shall be vented with a return bend vent pipe with an area not less than the area of the down-feed riser pipe, and the vent shall be screened with a corrosion-resestant screen of not less than 16 by 20 mesh per inch.

12
Q
  1. Devices that shall be installed with pressure regulator?
A
  1. Strainer required ahead of regulator.

2. Expansion tank required for regulator without integral bypass.

13
Q
  1. How can You increase pressure coming from pressure regulator?
A

By turning the bolt further into the regulator.