Massachusetts Plumbers Journeyman Practice Exam

What should provide an adequate supply of cold water from faucets to ensure proper functioning of food-waste grinder units?

1. Water softener

2. Electric heater

3. Thermostat

4. Faucets at sufficient flow rate

The correct answer is: Faucets at sufficient flow rate

The correct choice focuses on the necessity of having faucets that deliver water at a sufficient flow rate. Food-waste grinder units require a consistent and adequate supply of cold water to function effectively. This water is essential for flushing down waste and helping to break down food particles properly. When the flow rate is adequate, it ensures that the grinding process works smoothly, enhancing the efficiency of the unit and preventing clogs. The other options do not directly address the requirement for water flow for the grinders. A water softener primarily addresses water hardness issues, which is not the primary concern for the operation of food-waste grinders. An electric heater is related to hot water supply, which is not needed for the operation of these units, as they specifically require cold water for optimal performance. Lastly, a thermostat is used to regulate temperature in heating systems and has no relevance to the flow of water needed for a food-waste grinder.