Final answer:
Hot water running to shampoo bowls must be not less than the temperature necessary to kill bacteria to maintain proper hygiene and prevent the spread of infections.
Step-by-step explanation:
Hot water running to shampoo bowls must be not less than the temperature necessary to kill bacteria. This is because hot water is effective in sanitizing and disinfecting the shampoo bowls, preventing the spread of infections and diseases.
For example, in the healthcare industry, the Centers for Disease Control and Prevention (CDC) recommends a minimum hot water temperature of 110°F (43°C) for handwashing to ensure effective removal of microorganisms.
Therefore, the statement 'Hot water running to shampoo bowls must be not less than' is true as it relates to maintaining proper hygiene and preventing the transmission of germs.
The warning on electrical devices like hairdryers, which advises against using them when a bathtub or basin is full of water, is due to the significant risk of electrocution. Water is an excellent conductor of electricity, and if an electrical appliance falls into the water, it can cause the electricity to run through the water. This can lead to severe injury or even death for anyone in contact with the water at that time.