FREE AND STUDY GAMES ABOUT GAS HEATING BURNERS

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FREE AND STUDY GAMES ABOUT GAS HEATING BURNERS

EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -22 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: Determining the Size of the Orifice

Answer:

• Specific gravity of the gas
• Heat content of the gas
• Required Btu/hr required for each burner. The first two are determined by the type of gas. (natural

gas or propane)

Question 2: Gas Orifices Function

Answer:

Control Gas flow inject primary air

Question 3: Single Port Burners

Answer:

1) Upshot 2) Inshot

Question 4: Orifice Precautions

Answer:

1) Misaligned Orifice Spoils Primary injections 2) Don't cross-Thread the spud

Question 5: Carry Over Ports on some burners

Answer:

slots it is necessary to have a flame carry over between burners, so a single ignition device can ignite all the burners, Carry over ports are built into burners for this purpose and are shaped to span the gap between the burners.

Question 6: Gas Heating Burners

Answer:

Induced Draft & Forced Draft

Question 7: Purpose of the burner

Answer:

To properly mix the primary air and gas, Where combustion takes place, Uses primary and secondary air,Primary air enters the burner with the gas, Secondary air is provided to ensure proper combustion, Gas is ignited by the pilot.

Question 8: Gas Manifolds

Answer:

The manifold is a pipe through the gas flows to the burners. Gas orifices or spuds are mounted or threaded into the manifold. The manifold is attached to the outlet of the gas valve.

Question 9: Orifice Replacement

Answer:

1) Check the Orifice size for each installation 2) Replace new Orifice with proper size 3) Don't drill out or peen!!

Question 10: Forced-Draft

Answer:

• Combustion blower at the inlet of the heat exchanger and push combustion gases through the heat

exchanger.

• Positive pressure in the heat exchanger.

Question 11: The Major advantage Mono-Port Burner

Answer:

Their low cost and simplicity, used today induced draft and condensing furnaces

Question 12: Single Port Burners Upshot & Inshot

Answer:

The simplest and has one port, Most In-Shot burners are made out of aluminized steel,a crossover porting for flame retention and carryover to each main burner, no primary or secondary air adjustments

Question 13: Multi-Port Burner Components

Answer:

1) Orifice 2) Carry-over port 3) Ports 4) Venturi 5) Mixing Tube 6) Burner Head

Question 14: Primary Air and Secondary Air

Answer:

Primary air enters the burner near the orifice, velocity to creating a low pressure area, forcing it into the combustion area, Primary air alone does not provide complete combustion. Secondary air is required

Question 15: Two General Classifications of Burners

Answer:

• multi-port
• mono-port

Question 16: Primary air can be adjusted using

Answer:

Primary Air Shutters, two types:

1) butterfly 2) Rotating cylinder

Question 17: Induced Draft

Answer:

• Pulls combustion gasses through the heat exchangers.
• Slight negative pressure in the heat

exchanger.

Question 18: Mono-Port Burner Operate with 50% more Primary Air

Answer:

To stabilize the flame and minimize lifting because of increase air, a flame retainer is used to provide a quenching surface to anchor the flame. Noisy than multi-port

Question 19: Venturi Function

Answer:

Negative pressure draws in the primary air

Question 20: Types of Burners

Answer:

1) Cast Iron Burner with Slotted port

2) Stamped- steel slotted burner

3) Ribbon burner

4) In-shot burner

5) Up-shot burner

Question 21: Gas Orifices

Answer:

The orifice is a precisely drilled hole through which the gas flows from the manifold to the burners. The orifice is located in the spud. The spud is screwed into the manifold. The orifice allows the correct amount of gas into the burner

Question 22: All these burners are known as atmospheric burner

Answer:

The air for the burning is at atmospheric pressure