- You are directed to cut 4 pieces of pipe one each of the following lengths: 2 ft. 6-1/4in., 3 ft. 9-3/8in., 4 ft. 7-5/8in., 5 ft. 8-7/8in.; the total length of these pieces is most nearly:
A. 15 ft. 7-1/4in.
B. 15 ft. 9-3/8in.
C. 16 ft. 8-7/8in.
D. 16 ft. 8-1/8in.
D. 16 ft. 8-1/8in.
- When piping “sweats”, the cause for this is most likely:
A. Cold water running in a warm space.
B. Cold water running in a cold space.
C. Hot water running in a warm space.
D. Hot water running in a cold space.
A. Cold water running in a warm space.
- The location of leaks in gas piping may be best detected by the use of:
A. Match.
B. Heated filament.
C. Soapy water solution.
D. Oxygen.
C. Soapy water solution.
- A sanitary and storm water drainage system is to be water tested in sections. When testing the uppermost section, the upper footage of the next lower section which is to be tested is most nearly:
A. 3048mm.
B. 1524 mm.
C. 2438 mm.
D. 1219 mm.
A. 3048mm.
5. A combustible gas which may be present in sewer air and which is explosive in the presence of oxygen (smell like rotten eggs): A. Carbon dioxide. B. Hydrogen sulfide. C. Freon. D. Nitrogen.
B. Hydrogen sulfide.
- Of the following wrenches, the one which is best suited for us on chrome plated or polished brass is most nearly:
A. Monkey wrench.
B. Pipe wrench.
C. Open-end wrench.
D. Strap wrench.
D. Strap wrench.
- The one valve normally installed in a pipe line to allow flow in one direction only:
A. Blow-off.
B. Check.
C. Needle.
D. Three-way.
B. Check.
- All bullhead tees have run openings which are:
A. Smaller than the outlet.
B. Larger than the outlet.
C. Of the same size.
D. Of different sizes.
A. Smaller than the outlet.
- When lagging is used on steam pipes, its main function is to:
A. Prevent corrosion.
B. Compensate for expansion.
C. Reduce steam leaks.
D. Reduce radiation heat loss.
D. Reduce radiation heat loss
- The working pressure of a new potable water piping system is to be 50 psi. The minimum test pressure for this piping shall be most nearly:
A. 50 psi.
B. 100 psi.
C. 150 psi.
D. 200 psi.
C. 150 psi.
- A piping arrangement in which a drain from a fixture discharges at a point above the flood level rim of the receptacle is defined as a:
A. Air gap.
B. Air break.
C. Fixture drain.
D. Branch waste.
A. Air gap.
- The definition of an air gap in a water distribution system is most nearly:
A. The unobstructed vertical distance between the vacuum breaker and the overflow level of the plumbing fixture.
B. The unobstructed vertical distance between the center line of the water supply piping and the flood level rim of the plumbing fixture.
C. The unobstructed vertical distance between the bottom of the faucet and the overflow level of the plumbing fixture.
D. The unobstructed vertical distance through the free atmosphere between the lowest opening from any pipe or faucet supplying water to a tank, plumbing fixture or other device and the flood level rim of the receptacle.
D. The unobstructed vertical distance through the free atmosphere between the lowest opening from any pipe or faucet supplying water to a tank, plumbing fixture or other device and the flood level rim of the receptacle.
- The only method that can be depended on to prevent back-flow under all conditions is most nearly:
A. Air gap.
B. Cross connection.
C. Reduced pressure principle back-flow preventer.
D. Back-flow preventer.
A. Air gap.
- The discharge the is not permitted into the building storm drainage system is from most nearly:
A. Drinking fountain.
B. Condensate.
C. Cooling water.
D. Sub-surface water.
A. Drinking fountain.
- The water seal for a trap serving a combination funnel and floor drain shall be minimum of most nearly:
A. 4 in.
B. 2 in.
C. 2-1/2 in.
D. 3 in.
B. 2 in.
- Any physical connection or arrangement between two otherwise separate piping systems, one of which contains potable water and the other either of unknown or questionable safety or steam, gas or chemical, whereby there exists the possibility for flow from one system to the other, with the direction of flow depending on the pressure differential between the two systems is most nearly:
A. Anti-siphon.
B. Back-flow.
C. Cross connection.
D. Back-siphonage.
C. Cross connection.
- A “building trap” installed in the building drain is to prevent most nearly:
A. Sewer-rats from entering the building house drain.
B. Vermin from entering the plumbing system.
C. Excess flow of sewer water into the building sewer.
D. To prevent circulation of air between the drainage system of the building and the building sewer.
D. To prevent circulation of air between the drainage system of the building and the building sewer.
