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WorksheetsCHAPTER 6
Total questions: 10
Worksheet time: 5mins
What is the main purpose of a fullway gate valve in a plumbing system?
a) To regulate water temperature
b) To allow full water flow and shut off supply when needed
c) To increase water pressure
d) To filter out impurities
Why must elevated or gravity storage tanks be tightly covered?
a) To maintain water pressure
b) To prevent water from evaporating
c) To keep out unauthorized persons, dirt, and vermin
d) To prevent overflows
What device is required to control potable water inlets to gravity tanks?
a) Gate valve
b) Float valve
c) Check valve
d) Pressure regulator
Which type of urinal requires the highest water supply fixture units (WSFU)?
a) Wall urinal
b) Stall urinal
c) Pedestal urinal
d) Flush tank urinal
What is the purpose of the plumbing code’s sizing procedures?
a) To ensure even water distribution and prevent pressure loss
b) To reduce material costs
c) To minimize the number of shutoff valves
d) To eliminate the need for pipe insulation
Why should control valves be installed before each water-supplied appliance?
a) To regulate water temperature
b) To isolate appliances for maintenance or repairs
c) To improve water pressure
d) To prevent contamination
What is the first step in sizing a water supply piping system?
a) Select the pipe material
b) Determine the number of fixtures
c) Measure the available water pressure
d) Find the total pipe length
What is the minimum mesh size required for screening a gravity storage tank vent?
a) 10 to 12 mesh per 25 mm
b) 12 to 14 mesh per 25 mm
c) 14 to 18 mesh per 25 mm
d) 18 to 20 mesh per 25 mm
Which of the following factors affects the selection of the water meter size?
a) The color of the piping material
b) The number of shutoff valves installed
c) The brand of plumbing fixtures
d) Fixture unit demand
Where should a shutoff valve be installed for each apartment unit?
a) After the fixture trap
b) Before the main supply line enters the unit
c) Inside the water heater tank
d) Near the floor drain
