2015 IRC Plumbing Test

1. On a 2 story multifamily apartment building, a VTR terminates under a solar panel. The open area required for the VTR shall be calculated using:

A. The O.D. Of the pipe

B. The height above the roof

C. The I.D. Of the pipe

D. The piping material used

2. An island fixture vent is connected to a fixture drain using a common vent, that is conneced to a dishwasher. Is this allowed?

A. Yes

B. No

C. Yes, if there are only two fixtures

D. Yes, but the vent must be upsized for a higher DFU load

3. An AAV is installed on a 300 gallon tank in a non-engineered design. Will an inspector allow this?

A. Yes, but it must be sized according to tank capacity

B. No

C. Yes

D. Yes, if an designed by the contractor

4. ABS plastic pipe is installed in a hydronic system. What type of joint is allowed and what standard governs the installation?

A. Compression joint, ASTM D 2846

B. Solvent cement joints, ASTM D 1527

C. Soldered joint, ASTM B42

D. Threaded joint, ASTM F1281

5. Convectors shall be supported:

A. Independently of the hydronic system

B. In parallel with the hydronic system

C. At 5 ft intervals

D. According to manufacturer

6. Polyethylene tubing that is embedded, shall be installed with:

A. Heat fusion joints

B. Solvent cement joints

C. Brazed joints

Compression joints

In a residential setting, ground source heat pump systems shall be installed using:

A. Steel pipe

B. Copper tubing

C. PE-AL-PE pipe

Brass tubing

8. Boilers shall have a valve located:

On supply piping only

B. Return piping only

C. No valves required

D. Supply and Return Piping

9. For a forced hot water system, with a pressurized diaphraghm type expasion tank, in a system volume with a volume of 70 gallons, what is the minimum capacity of the tank?

A. 10

B. 6

C. 22

D. 14

10. A subsoil drain for a singlel family dwelling that is 2475 sq. ft, the minimum size of the drain shall be ______inches and be protected by a:

A. 6 inches, a clean out

B. 4 inches, a backwater valve

C. 3 inches, a freeze plug

D. 2 inches, thermal insulation

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2015 IRC Plumbing Test

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