Exam (elaborations)
BOILER LISCENSE EXAM Q & A #15
- Course
- Institution
BOILER LISCENSE EXAM Q & A #15
[Show more]
Seller
Follow
puritywanjihia
Content preview
BOILER LISCENSE EXAM Q & A #15What is the highest amount of pressure that the vessel is designed to withstand -
correct answer Maximum Allowable Working Pressure (M.A.W.P)
How is pressure measured? - correct answer in terms of pounds per square inch or PSI
What does PSIG indicate? - correct answer gauge pressure not including atmospheric
What does PSIA indicate? - correct answer (absolute) the sum of gauge pressure plus
the atmospheric pressure at that location, which varies based on altitude
What does a compound gauge measure? - correct answer pressure and vacuum
___________________ ____________________ ________________________ are
designed to withstand a maximum of 15 psig steam or a MAWP 160 psig water, does
not exceed 250 F - correct answer low pressure boilers
______________ _______________ ______________ are designed to withstand
pressures above 15 psig steam and/or 160 psig water, or the temperature exceeds 250
F - correct answer high pressure boilers
What is the max amount of PSIG a low pressure boiler can withstand? - correct answer
15 psig steam and 160 psig water
What amount of pressure is a high pressure boiler able to withstand? - correct answer
above 15 psig steam and/or 160 psig water
A __________ ____________ has fire or gases of combustion in tubes and water
surrounding the tubes - correct answer firetube boiler
What re the types of firetube boilers? - correct answer firebox, scotch marine, vertical,
horizontal return tube (HRT) and locomotive
The firebox and horizontal return tube (HRT) boilers have a __________ separate from
the pressure vessel? - correct answer furnace (firebox)
_____________ _______________ boilers have water running through the tubes and
fire or gases of combustion surrounding the tubes - correct answer water tube boiler
What are the watertubes connected to in a watertube boiler? - correct answer a steam
drum at the top and a mud drum at the bottom
Where is the fire in a watertube boiler? - correct answer in the combustion chamber
, What are the other common ways a boiler is identified by? - correct answer the shape of
the tube configuration with teh common types being called A, O and D type boilers
__________________ ______________ _______________ boiler is neither firetube
nor watertube though it has some operating characteristics of a watertube boiler. -
correct answer Cast iron sectional boiler
In a cast iron sectional boiler where is the water and heat located? - correct answer the
water is located inside the sections and the fire is outside the sections
How may a boiler be classified? - correct answer as a steam boiler or a hot water boiler
What determines the use of the vessel? - correct answer the boiler trim ( controls and
piping)
A ___________ ______________ boiler is completely full of water over the top of the
boiler into the expansion tank - correct answer hot water boiler
What is the driving force of air and fuel flow into the furnace? - correct answer
differential pressure between the gases inside the furnace and those outside the
furnace
Furnace pressure is often referred to as _______ or __________ ___________ -
correct answer draft or draft pressure
How is the draft maintained? - correct answer slightly negative to prevent the
combustion products and ash from being discharged from the furnace into surrounding
areas through inspection ports, doors, feeders, etc
________________ is the difference in pressure between two points that causes air or
gases to flow - correct answer draft
A natural draft heater uses the _______ effect? - correct answer stack (chimney)
How does a natural draft heater work? - correct answer the gases inside the stack are
less dense than those outside the chimney the gases in the stack will rise, creating a
vacuum (suction) which will draw the combustion air into the furnace and combustion
gases or flue gas out of the furnace
Natural draft furnaces naturally operate ________________________________. -
correct answer below atmospheric pressure
A _____________ _____________fan draws the gases through the furnace and the
combustion air into the furnace - correct answer induced draft
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 puritywanjihia. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.39. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
78861 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now