Test 2 Flashcards
You are piping a low-pressure steam cast iron boiler requiring 2 low water cut-off controls. The boiler only has one set of 1 inch equalizing tapings for a combination low water cut- off/pump controller. You must also install an auxiliary low water cutoff with manual reset. Which of the following alternatives is the most acceptable installation application for the auxiliary low water cut - off?
Install the device in the tapped openings available for attaching the water gauge glass direct to the boiler using ½ inch nonferrous tees or Ÿ’s
If boiler drain lines are intended to be used both as drains and as blowoffs how many valves are required?
2
When installing a low water cut off on a hot water heating boiler, you may install it.
Any place above the lowest safe permissible water level and before the first stop valve.
The maximum suggested pipe support spacing (span) for a 6-inch pipe for steam, gas air service is
21 feet
The dial of the pressure gage on a high-pressure boiler shall be graduated to no less than times the pressure at which the safety valve is set
1.5 x
When piping a steam pressure gauge, what is the minimum pipe size connections to the boiler where steel or wrought iron pipe or tubing is to be used?
1/2
Nonferrous - 1/4”
Water hammer in steam lines is caused by what condition?
Condensate in steam lines
522 CMR 16.00 Automatic controls for automatically fired boilers, requires that when multiple pressure controls are mounted on or fed from manifold, the manifold and common source connection to the boiler shall be at least what pipe size?
3/4
When a high-pressure boiler plant only has one boiler which statement would be true?
An automatic non return valve is not necessary
Which is mandatory to have installed on a separate connection on a hot water heating boiler?
Thermometer
When 2 boiler stop valves are required on a high-pressure boiler, what shall be required?
A free blow drain placed between the stop valves.
