The vehicle safety certification label includes _______
A) VIN B) Month and year of manufacture
C) Gross vehicle weight rating D) All of these
D
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The bolt circle has 8 holes equally spaced. What is the angular distance between each hole?
Answer the following statement(s) true (T) or false (F)
Concealed joints in fuel gas piping systems can be made up of unions, tubing fittings, running threads, or right and left couplings.
How is a temperature-pressure relief valve on a hot-water boiler tested?
A) Jump the high limit and operate the burners until the pressure relief valve opens. B) Pull the lever and look for water at outlet of discharge pipe. C) Pressurize the boiler with nitrogen until the pressure relief valve opens. D) Pressure relief valves are optional, so testing is not required.
Updating HVAC equipment improves energy efficiency and pays back the expense of installation with savings over a ________ year period
A) 1- to 3 B) 5- to 7 C) 7- to 10 D) 3- to 5