Exam (elaborations)
Hot Water Boilers – Questions With Solutions
- Course
- Institution
Hot Water Boilers – Questions With Solutions
[Show more]
Seller
Follow
LeCrae
Reviews received
Content preview
Hot Water Boilers – Questions With SolutionsBackflow preventers
A)
prevent water from flowing out of the expansion tank.
B)
prevent reverse flow in the distribution system.
C)
keep the domestic water out of the boiler water.
D)
keep the boiler water out of the drinking water. ✔️Ans - The answer is
KEEP THE BOILER WATER OUT OF THE DRINKING WATER. The backflow
preventer stops the boiler water from getting back into the drinking water.
Typical water pressure at a boiler at rest in a three-story house is
A)
1 to 5 psi.
B)
slightly higher than in a two-story home.
C)
lower than in a two-story home.
D)
5 to 10 psi. ✔️Ans - The answer is SLIGHTLY HIGHER THAN IN A TWO-
STORY HOME. The typical pressure for a boiler at rest in a three-story house is
10 to 15 PSI. It is likely to be close to 15 PSI because the boiler has to push
water up three stories. It isn't usually above 15 PSI, because that is the
maximum setting on most pressure-reducing valves.
If there is no water in the boiler, the low water cutout prevents the
A)
burner from firing.
B)
circulator from operating.
C)
pressure reducer from adding water.
, D)
entrapment of air in the air separator. ✔️Ans - The answer is BURNER
FROM FIRING. If there is no water in the boiler, the low water cutout prevents
the burner from firing.
How much heat is typically needed in an older poorly insulated home in the
northern United States?
A)
10 to 30 BTUS per square foot
B)
60 to 90 BTUS per square foot
C)
5 to 10 BTUS per square foot
D)
30 to 60 BTUS per square foot ✔️Ans - The answer is 30 TO 60 BTUS PER
SQUARE FOOT. In the northern U.S., older homes typically need 30 to 60 BTUs
per square foot. Modern homes that are better insulated and more
weathertight need roughly 20 to 30 BTUs.
Where is the best location for a radiator in a basement room, in an open
system (assuming the boiler is in the basement)?
A)
On the ceiling
B)
On the exterior wall
C)
Underneath the raised floor
D)
On the interior wall ✔️Ans - The answer is ON THE CEILING. The radiator
has to be high in the room if it is in a basement and an open system.
Otherwise, heat will never flow to that radiator.
What is the normal operating pressure in a boiler?
A)
9 to 12 psi
B)
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller LeCrae. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
72042 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now