BLUE
1. Dr. Hunter's method utilizes water supply fixture units (WSFUs), fixture flow demand charts, and friction loss/flow rate charts to determine pipe sizes.
1. ANS: T Ref: Ch. 7 pg. 251
3. In the 2021 IPC pipe size / pressure range tables, 5% of the total developed length is added to the total length to account for friction loss in a building water supply system.
3. ANS: F Ref: Ch. 7 pg. 257
5. Hunter's Curve can be used to estimate the number of fixture units for a single room.
5. ANS: F Ref: Ch. 7 pg. 265
7. The minimum pressure fluctuation may be obtained by taking a pressure reading using a gauge that will register the minimum pressure as measured over a 24-hour period, or it may be obtained from the water purveyor.
7. ANS: T Ref: Ch. 7 pg. 275
9. Velocities in a water supply system shall not exceed 10 ft/s (3 m/s), except as otherwise approved by the authority having jurisdiction (AHJ).
9. ANS: T Ref: Ch. 7 pg. 298
2. Standard pressure due to the weight of air at sea level is 0 psia (0 kPa).
2. ANS: F Ref: Ch. 7 pg. 254
4. Velocity in a water supply system is affected by the demand at the point of use, the capacity of the supply system, and pressure.
4. ANS: T Ref: Ch. 7 pg. 260
6. A pipe segment is the length of piping from one branch fitting to the next branch fitting or the fixture branch serving a fixture or appliance outlet.
6. ANS: T Ref: Ch. 7 pg. 272
8. The demand line is the water supply pipe that connects a fixture to a branch water supply pipe or to the main water supply pipe.
8. ANS: F Ref: Ch. 7 pg. 282
10. The 2021 UPC method for sizing a building water supply system allows for precise friction loss and flow rate calculations that will benefit large installations.
10. ANS: T Ref: Ch. 7 pg. 292
1. Pressure according to the height of a liquid is called ___.
A. velocity
B. water pressure
C. head
D. volume
1. ANS: C Ref: Ch. 7 pg. 253
C. head
3. Pressure drop in pipe is caused by ___.
A. air leaks
B. improper installation
C. long runs of pipe
D. friction
3. ANS: D Ref: Ch. 7 pg. 256
D. friction
5. ___ is the volume rate of demand for water imposed on the water-distributing system or any branch thereof by the use of water, as by plumbing fixtures.
A. Rate of flow
B. Demand load
C. Point-of-use demand
D. Pressure loss
5. ANS: B Ref: Ch. 7 pg. 263
B. Demand load
7. When using the 2021 UPC to size building supply pipe, ___ psi should be added or subtracted, depending on whether the elevation change is positive or negative, for each foot (305 mm) of difference in elevation between the source of supply and the highest water supply outlet in the building or on the premises.
A. 1/4
B. 1/2
C. 2
D. 4
7. ANS: B Ref: Ch. 7 pg. 285
B. 1/2
9. The assembly or assembly-use category for amusement parks, stadiums, outdoor activities, and sporting events is ___.
A. A-1
B. A-3
C. A-4
D. A-5
9. ANS: D Ref: Ch. 7 pg. 269
D. A-5
2. ___ pressure is used to express the pressure derived from the operation of a closed system.
A. Gauge
B. Atmospheric
C. Vacuum
D. Absolute
2. ANS: A Ref: Ch. 7 pg. 254 A. Gauge
4. Velocities above ___ fps will cause erosion, cavitation, pressure surges, and undesirable noise.
A. 2
B. 5
C. 7
D. 10
4. ANS: D - D. 10 Ref: Ch. 7 pg. 261
6. ___ use applies to plumbing fixtures in residences and apartments, to private bathrooms in hotels and hospitals, and to restrooms in commercial establishments where the fixtures are intended for the use of a family or an individual.
A. Commercial
B. Assembly
C. Public
D. Private
6. ANS: D
D. Private Ref: Ch. 7 pg. 269
8. According to the 2021 IPC, water service pipe shall be a minimum of ___".
A. 1/4
B. 1/2
C. 3/4
D. 1
8. ANS: C Ref: Ch. 7 pg. 283
C. 3/4
10. Where a water pressure reducing valve is installed in the water distribution system, the minimum daily static water pressure available is ___% of the minimum daily static water pressure at the source of supply or the set pressure downstream of the pressure reducing valve, whichever is smaller.
A. 20
B. 40
C. 60
D. 80
10. ANS: D Ref: Ch. 7 pg. 285
D. 80
1. ___ is force acting on a surface and can be described or measured as force per unit of area, or force divided by area.
1. ANS: Pressure Ref: Ch. 7 pg. 252
2. A(n) ___ pressure gauge is a mechanical pressure gauge with a curved tube made of thin metal that acts as a pressure-sensing element
2. ANS: Bourdon tube Ref: Ch. 7 pg. 255
3. ___ is the friction loss caused by a fitting or valve equated to the friction loss of a straight length of pipe.
3. ANS: Equivalent length Ref: Ch. 7 pg. 258
4. ___ is the volume of a moving fluid related to time.
4. ANS: Rate of flow Ref: Ch. 7 pg. 262
5. Water pipe sizing has two primary objectives: maintaining ___ at levels that are appropriate for the type of pipe being installed and matching pipe sizes to the total demand in WSFUs.
5. ANS: flow velocities Ref: Ch. 7 pg. 268
6. ___ water flow is water flow that periodically starts and stops.
6. ANS: Intermittent Ref: Ch. 7 pg. 271
7. Pipe branches should be sized starting at the most ___ fixture branch (hot or cold).
7. ANS: remote Ref: Ch. 7 pg. 292
8. A reduced-size flexible water connector installed between a supply pipe and a fixture shall be of a(n) ___ type.
8. ANS: approved Ref: Ch. 7 pg. 281
9. Where the highest group of fixtures contains flushometer valves, the ___ pressure for the group shall be not less than 15 pounds-force per square inch (psi) (103 kPa).
9. ANS: residual Ref: Ch. 7 pg. 295
10. The maximum developed length for water piping is the actual length of pipe between the source of supply and the most remote fixture, including either hot (through the water heater) or cold water branches, multiplied by a factor of 1.2 to compensate for ___.
10. ANS: pressure loss Ref: Ch. 7 pg. 291