Plumbing - Test 1


1. What is the most reliable connection for copper water supply lines?
A. Compression connection
B. Flare connection
C. Soldering
D. Welding


2. Positioners allow operators to identify?
A. Valve location for installation
B. How open or closed the valve is for throttling
C. The media in the valve
D. The type of seat inside the valve


3. The taper on NPT threads allows them to?
A. be flexible
B. prevent cross threading
C. withstand more pressure
D. form a seal when torqued


4. What is a side effect of bending tube?
A. The tube gets longer
B. The tube gets shorter
C. The wall on the Inside of the bend gets thinner
D. The wall on the outside of the bend gets thinner


5. The inside of fittings used in a drain-waste-vent system must be?
A. filed
B. coated
C. smooth
D. back welded


6. Why is it important to square the flange using two holes?
A. It allows the piping spool to be leveled and squared
B. You can't remove or replace a gasket if your flange is not square
C. It allows for better inspection of the flange
D. You cannot bolt to an existing square flange if the flange you are installing is not square


7. Which joining procedure is used for plastic pipe on a natural gas service?
A. Brazing
B. Threading
C. Thermal Fusion
D. Solvent Welding


8. What wrench would be best to use on round chrome covered pipe?
A. Crescent wrench
B. Pipe wrench
C. Spud wrench
D. Strap wrench


9. When opening a gate valve?
A. A power actuator must be used
B. The flow rate remains consistent
C. Open partially at first, to release built up pressure
D. Flow rate does not change evenly with stem travel


10. The butterfly valve best suited for high-pressure systems is the:
A. Zero offset
B. Triple offset
C. Double offset
D. Single offset







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