Test 5 Flashcards
A siphon is used to
Protect a steam pressure gauge
When the pressure exceeds 100 PSI the boiler blowoff fittings shall be what metal
Steel
The maximum size (NPS) of a surface blow-off connection shall not exceed ________
inches
2.5”
Hangers used for the support of piping NPS ________ inches and larger shall be designed to permit adjustment after erection while supporting load.
2.5
Each high temperature water boiler shall have a bottom drain connection of at least ________ inch in direct connection with the lowest water space practical
3/4
The heating boiler code requires that when a stop valve is used in the supply pipe connection of a single steam heating boiler there shall be an additional stop valve placed where?
In the return pipe connection
The automatic non -return valve on a high-pressure boiler is located
At the boiler proper outlet
The minimum pressure rating of all valves or cocks on a heating boiler shall be at least equal to the
Pressure stamped on the safety valve
The purpose of the safety valve is to
Protect the boiler from excess pressure
The minimum temperature rating of all valves or cocks on a heating boiler shall be at least equal to ________°F
250°F
All valves and fittings on steam lines for boiler external piping of high-pressure boilers shall have a pressure rating of at least _______ PSI
100
The bourdon tube in a steam pressure gauge is protected by a
Syphon
The pipefitter license is governed by chapter 146 of M.G. L. the section of this law is section ________ of M.G. L
81
A Massachusetts pipefitting license is required to work on heating systems
input heat greater than ______ BTUs.
What chapter is this listed?
700,000 BTUs
Chapter 146
When not more than two high pressure safety valves of different sizes are mounted singly on a boiler, the relieving capacity of the smaller valve shall not be less than % of the larger valve?
50%
