4th Class Power Engineering Part B Unit 3 - Boiler Safety Devices
7 views 0 purchase
Course
Power Engineering
Institution
Power Engineering
4th Class Power Engineering Part B Unit 3 - Boiler Safety Devices
35 kPa - ANS For a steam heating boiler, the safety valve shall be such that, with the fuel burning equipment installed and operated at maximum capacity, the pressure cannot rise more than _____ above the maximum allowable workin...
4th Class Power Engineering Part B Unit 3
- Boiler Safety Devices
35 kPa - ANS For a steam heating boiler, the safety valve shall be such that, with the
fuel burning equipment installed and operated at maximum capacity, the pressure
cannot rise more than _____ above the maximum allowable working pressure when all
steam outlets are closed
A
The Manufacturer - ANS LP boiler safety valves can be repaired by this
VI
Steam pressure acting on the disk of the valve - ANS A boiler steam drum safety
valve opens by means of
TU
Screw the blow down ring downwards - ANS To raise only the closing pressure of the
valve, one would
Perform an accumulation test - ANS If you are not sure that the safety valves are of
IS
sufficient capacity for the boiler, you would
Lip - ANS A part on a safety valve that allows it to pop open
OM
Pressure is up to at least 34 kPa - ANS On steam heating boilers, the safety valve test
lever must not be used unless
Monthly - ANS A steam heating boiler safety valve lever test should be performed
NA
20 kPa - ANS For hot water boilers operating up to 400 kPa, a pressure relief valve
opening pressure tolerance may be as much as
JP
Blowdown of a Safety Valve - ANS Defined as the difference between opening and
closing pressures
Suddenly increased due to a larger area - ANS Safety valves "pop" open because the
force of the steam is
6% - ANS Safety valves must be large enough to discharge all the steam a boiler can
produce without allowing the pressure to exceed the maximum allowable working
pressure by more than
, DN 15 (½ in) - ANS According to the current code no safety valve on a steam heating
boiler shall be smaller than
DN 100 (4 in) - ANS According to the current code no safety valve on a steam heating
boiler shall be larger than
Operate the test lever two or three times in order to allow the disk to seat - ANS After
checking a safety valve using the try lever, the valve continues to simmer after closing.
In order to close the valve fully the operator should
A
Increased or decreased by up to 5% - ANS The popping pressure of a safety valve
VI
may be
Manufacturer Representative - ANS The only person who can adjust the opening
TU
pressure or popping point of a safety valve is a
At least two - ANS If a boiler has 57 square metres of heating surface, it must have
___________ safety valves
IS
Increase the amount of blowdown - ANS Raising the blowdown ring on a pop safety
valve will
OM
Vertical - ANS The safety valve on steam boiler shall be installed in the _____ position
and located in the highest practicable part of the heating boiler proper
Stop Valve - ANS Device that is NOT allowed before or after the safety valve
NA
Melting of the alloy in a fusible plug - ANS Temperature relief valves can open on a
rise in temperature by the expansion of a wax-filled rod or by the
Adjusting Ring - ANS The blow down on a safety valve is adjusted by turning the
JP
Disc Area - ANS The force of the steam pressure acting on the safety valve disc is a
function of the
Seal - ANS Device that a boiler inspector will install in order to prevent tampering with
a safety valve setting
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 JPNAOMISTUVIA. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.99. You're not tied to anything after your purchase.
