NV C-1A Boilers Practice Questions - Nevada C-1A Boilers Contractor Examination Exam - NV C-1A Boilers Practice Questions - Nevada C-1A Boilers Contractor Examination Exam

Question 1

What is the primary purpose of a safety or pressure-relief valve on a boiler?

Maintain a constant circulating-loop temperature during light load. Automatically add makeup water when the system cools. Indicate water level in the gauge glass during firing. Prevent pressure from exceeding the boiler maximum allowable working pressure.

Correct Answer:

Prevent pressure from exceeding the boiler maximum allowable working pressure.

Question 2

Which installation practice is prohibited on a boiler safety or relief valve?

A full-size discharge pipe of the same diameter as the valve outlet. A rigid discharge pipe approved for the system temperature. A shutoff valve between the boiler tapping and the relief valve, or on the discharge pipe. Support of the discharge pipe so it does not stress the valve body.

Correct Answer:

A shutoff valve between the boiler tapping and the relief valve, or on the discharge pipe.

Question 3

A suspected natural-gas leak at a boiler gas train should be located with which method?

An open flame passed along fittings until the leak lights. A listed combustible-gas detector or a noncorrosive leak-detection solution (soap test). Oxygen introduced into the piping to raise the test pressure quickly. A match at the relief-valve discharge to confirm draft.

Correct Answer:

A listed combustible-gas detector or a noncorrosive leak-detection solution (soap test).

Question 4

Per UMC 2018 Section 1005.0, how must a boiler safety or relief valve discharge be piped?

Reduced one pipe size, valved, and tied into the building sanitary stack. Through a water-seal trap so steam cannot enter the room. Into the expansion tank so discharged water is saved. Full size, with no valves or obstructions, to a safe point such as within 18 inches of the floor or an open receptacle.

Correct Answer:

Full size, with no valves or obstructions, to a safe point such as within 18 inches of the floor or an open receptacle.

Question 5

Using the indoor standard method, what minimum room volume is required for combustion air for a 120,000 Btu/h gas boiler?

1,200 cubic feet 2,400 cubic feet 6,000 cubic feet 12,000 cubic feet

Correct Answer:

6,000 cubic feet

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About this Exam

Prepare with the NV C-1A Boilers Practice Questions - Nevada C-1A Boilers Contractor Examination Exam practice quiz. This question bank includes 100 questions covering boiler, hydronic, nfpa, piping, and fuel-oil. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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NV C-1A Boilers Practice Questions - Nevada C-1A Boilers Contractor Examination Exam

This practice set contains 100 questions from the matching question bank and focuses on boiler, hydronic, nfpa, piping, and fuel-oil. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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NV C-1A Boilers Practice Questions - Nevada C-1A Boilers Contractor Examination Exam

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