Installation And Servicing Of LP Steam Systems

Question 0

What are the characteristics of a vacuum type vent?

Answer 0

Non return proportional air venting

Question 1

Why is end of main vent required on large one pipe systems?

Answer 1

To insure quick venting of air from the horizontal steam main

Question 2

Why is a minimum 1/2” annular space required around a stub to a radiator

Answer 2

To allow for movement of the pipe and radiation due to expansion and contraction

Question 3

How is the air vented from the radiator in a two-pipe pumped condensate return low-pressure steam system

Answer 3

Through the traps

Question 4

What should be done if the pressure in a steam coil becomes too low to push the condensate back to a return main when using a modulating controller

Answer 4

Install a relief trap

Question 5

What does the presence of soot in the firebox or in the flues or vents indicate?

Answer 5

Lack of combustion air

Question 6

What is the first thing to do if no water is visible in a sight glass and the boiler is still firing

Answer 6

Shutoff fuel supply to the boiler

Question 7

What will the temperature of a mixture of air and steam to be at 10 psig

Answer 7

Lower than the saturation temperature of 100% dry steam

Question 8

What should be done with the isolation valves before breaking open the pipe joints to service or repair the line or equipment?

Answer 8

Check that the valves are closed then tag and if possible lock out the valves