Self-Test C-2.2: Plumbing Appliance Installation

Complete Self-Test C-2.2 and check your answers.

1. When installed, why should the drain hose from an adjacent dishwasher be connected to the garbage disposal unit?
   1. Preheats the motor
   2. Flushes out the unit
   3. Lubricates the cutters
   4. Provides a trap

    

2. Why should the discharge hose from a dishwasher be mounted as high as possible under the countertop before being connected to the sink drain fitting or garbage grinder?
   1. Prevents backflow
   2. Prevents water hammer
   3. Provides room for expansion
   4. Permits removal and replacement

    

3. What is the minimum required height of a clothes washer standpipe?
   1. 450 mm
   2. 600 mm
   3. 750 mm
   4. 900 mm

    

4. Who is responsible for installing a new branch circuit for an appliance?
   1. Plumber
   2. Site foreman
   3. General contractor
   4. Electrical contractor

    

5. What is used to monitor the temperature of the water in a storage tank water heater?
   1. Relief valves
   2. Elements
   3. Thermostats
   4. Sensors

    

6. What is the recommended storage water temperature for a storage tank water heater to ensure sufficient bacteria kill?
   1. 40°C (104°F)
   2. 50°C (122°F)
   3. 60°C (140°F)
   4. 80°C (176°F)

    

7. What is the minimum recommended length of copper tubing that should be installed when connecting to the top of a storage tank water heater?
   1. 300 mm
   2. 450 mm
   3. 600 mm
   4. 750 mm

    

Answer Key: Self-Test C-2.2 is on the next page.