Question

gas and oil fired water heaters have all of the following except
○ dip tubes
○ a heat exchanger that is typically a hole going up through the center of the tank
○ insulated tanks
○ sacrificial anodes
○ lower recovery rates than electric water heaters

question 48
which of the following statements about leaking water heaters is not true?
○ water heaters often leak at the bottom first
○ the leaks are never a result of rusting
○ the life expectancy of a water heater is less than a boiler
○ tanks may leak because of poor connections
○ the temperature/pressure relief valve or drain valve may be leaking

Explanation:

For the first question, gas and oil - fired water heaters generally have dip tubes, insulated tanks, sacrificial anodes, and their heat exchanger is not a simple hole through the center of the tank. Also, they typically have higher recovery rates than electric water heaters.
For the second question, rusting can be a cause of water - heater leaks. Water heaters often leak at the bottom first, have a shorter life - expectancy than boilers, may leak due to poor connections, and the temperature/pressure relief or drain valve may leak.

Answer:

1. E. lower recovery rates than electric water heaters
2. B. the leaks are never a result of rusting