A noise level of _____ or above can cause hearing loss.

• 65db

• 75db

• 85db

• 95db

Proper ventilation is required when working with

• solvents

• alignment lasers

• scaffolding

• copper pipes

When replacing a water heater, in order to ensure safety, replace the _____ valve.

• backflow preventer

• temperature and pressure relief

• flushometer

• vacuum-breaker

What condition can cause a gate valve to fail to stop the flow of water?

• the gate is worn

• the packing nut is too tight

• the seat screw is too loose

• the diaphragm is full of foreign material

Once copper tubing has been cut to the proper length the next step in the preparation of the solder connection would be to _____ the pipe.

• Clean

• Ream

• Flux

• Flare

The inert gas used to sweep copper tubing while performing brazing operations is

• Nitrogen

• Oxygen

• Hydrogen

• Acetylene

Oakum and _____ are used to join SV weight cast iron pipe and fittings.

• Cement

• Lead

• EDPM

• Solder

An _____ is used to cut NO-HUB and SV weight cast iron.

• oxyacetylene torch

• circular saw

• cross-cut saw

• snap cutter

When making a 13-1/2 inch off-set using steel pipe, what is the travel between two 45-degree elbows, center-to-center?

• 5-9/16 inches

• 9-1/2 inches

• 19-1/6 inches

• 20-1/4 inches

What are the three sides of the triangle formed by a 45-degree off-set called?

• run, off-set, and travel

• centerline, off-set, and travel

• roll, centerline, and off-set

• constant, roll, and travel