Why Do Water Heaters Lose Their Efficiency Quicker in Households

question 106

Multiple Choice

Why do water heaters lose their efficiency quicker in households with hard water?

• A)The hard water calcium and magnesium ions corrode the heating element.
• B)The hard water calcium carbonate deposits oxidize the inner tank wall.
• C)The calcium carbonate on the inner surface of the hot water tank builds up to the point that it insulates the water from the heating element.
• D)The hard water calcium ions exchange with iron ions from the inner metal wall which react with the water heater base to form rust and deteriorate the bottom of the tank.

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Definitions:

Total-Product Schedule

A table showing the output or total product produced by a firm at different levels of input resource.

Output

Refers to the total amount of goods or services produced by a firm or economy over a specific period.

Marginal Revenue Product

This term refers to the additional revenue generated from using one more unit of input, illustrating the contribution of that unit to the total output's revenue.

Last Unit

Refers to the final item or unit produced or consumed, which can be significant in determining the marginal cost or utility.