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Unit 81 Boiler and Related Equipment – Qs & As
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Unit 81 Boiler and Related Equipment – Qs & As
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Unit 81 Boiler and Related Equipment – Qs & AsWhat kind of boiler is used for residential installations? ✔️Ans - Hot-
water.
What is the difference between a steam boiler and a hot water boiler?
✔️Ans - A hot water boiler does not actually boil the water.
Why are steam boilers used in applications requiring a large heating capacity?
✔️Ans - Because it takes 10 times more heat to boil a pound of water than to
change its temperature 100°F.
Most hot water boilers heat the water up to temperatures? ✔️Ans - Of
180°F to 200°F.
Radiant floor heating systems typically operate at temperatures of? ✔️Ans -
85°F to 140°F.
What is the minimum desired return water temperature for a gas fired boiler?
✔️Ans - At least 140°F returning to the boiler.
Why is it desirable to have a minimum water temperature entering the boiler?
✔️Ans - To prevent condensation in the flue.
What is a pickling solution? ✔️Ans - A corrosion inhibitor used on steel
pipes.
What materials are boilers commonly made from? ✔️Ans - Most boilers
are either cast iron or steel.
What is the purpose of bypass piping on a hot water gas fired boiler? ✔️Ans
- Ensure that the return water temperature does not drop too low.
What is the difference between a fire tube and a water tube boiler? ✔️Ans -
Water is inside the tubes of a water tube boiler and outside the tubes of a fire
tube boiler.
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