Exam from RJES

• What is the total WSFU for two lavatories in a residential structure?

  2
• Materials used for hot and cold – water supply systems are not made of Asbestos Cement
• 2


  WSFU for Public Drinking Fountain
• Zero pH is considered as acid.
• 1 ½ “ / 38mm


  Trap size for laundry trays
• Ground water


  Water that occurs below the surface of the earth, where it occupies spaces in soils or geologic strata
• Fixture branch


  This refers to the supply pipe between the fixture supply pipe and the water distributing pipe.
• Bored wells


   The type of well dug with earth augers, usually less than 30 m deep.
•  What is the copper content in brass fitting?

  85%
• Infiltration


  The movement of water to the surface of a soil and into the soil below the surface
• Building water service pipes should be at least 19mm in diameter.
• SV

  Type of cast iron pipe generally used for building installation.
• What is the commercial length of G.I pipe?

  6 m
• Vitrified clay pipe is also known as Terra Cotta.
• One fixture unit is equivalent to 28.3 liters/min.
•  Trap size for bathroom shower stall is 2" / 51mm.
• Fresh water


  Water having a salt concentration below 0.01%.
• Salt water


  Water having a salt concentration less than 3%
• Brackish water


  Water having a salt concentration less than 0.01% but more than 3%
• Copper tubes shall not be used for pipings conveying chemicals.
• XV

  Type of cast iron pipe is generally used for underground installation
• 2”/51mm


  Size of drain for shower stall
• Plumbarius


  Refers to an individual who worked in the sanitary field of ancient Rome.
• Tube


  It specifies outside diameter and wall thickness.
• What fitting is used to connect cast iron pipes to plastic pipes?

  Adaptors
• WSFU designated for flush tank water closet for private use is 3.
• The water demand for shower head is 5 gpm.
• HWT means Hot Water Tank.
• Type M copper tubing may be used for water piping when piping is above ground, inside or atop a building, or underground outside of structures with outside protective coating.
• PB - Polybutylene

  Plastic tube colored black & whose cross - sectional shape is normally oval. It is denoted by its outside diameter and is normally used as a water service connection from the main to the meter.
• Minimum discharge pipe and fitting for bathtub is 1 ½ “ / 38mm.
• Floc


  The jelly-like substance formed in the process of coagulation.
• Commercial length available for PPR (Polypropylene Random Copolyme) pipes.

  4 meters
• CPVC - Chlorinated Polyvinyl Chloride


  A kind of plastic pipe which has excellent chemical, crush and fire resistance, high impact and tensile strength and is non – toxic; used for hot and cold – water applications.
• Commercial standard length of cast iron hub type is 1.5 m
• Black


  Color designated for fuel oil division.
• Static Pressure


  Pressure existing without any motion of flow.
• Corporation Stop


  is inserted into the water main and it serves as the control of the water service.
• HDPE - High Density Polyethylene
• Cast Iron Double Hub


  It is preferred when a piece of pipe needed is shorter than 150 cm long. When the pipe is cut, both ends have hubs to serve as joint connectors.