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