How is a temperature-pressure relief valve on a hot-water boiler tested?
A) Pull the lever and look for water at outlet of discharge pipe.
B) Jump the high limit and operate the burners until the pressure relief valve opens.
C) Pressurize the boiler with nitrogen until the pressure relief valve opens.
D) Pressure relief valves are optional, so testing is not required.
A
You might also like to view...
What components would be contained in a typical post-2007 exhaust gas aftertreatment system?
A. oxidizing catalytic converter B. diesel particulate trap C. muffler D. all of the above
Water chillers require a(n) ____________________ in the chiller control circuit to ensure that the chilled water pump is operating before the water chiller refrigeration unit operates.
Fill in the blank(s) with the appropriate word(s).
How does Apple get discounts from suppliers?
A. Custom parts B. Supplier fatigue C. Corporate kickbacks D. Significant volume
The largest breed of rabbit in the United States is the:
A. Giant Angora B. Flemish Giant C. Holland Lop D. Lilac