Plumbing Level 2 Final Review (2) Exam Questions and Answers
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Course
Plumbing
Institution
Plumbing
Which pilot ignition type remains on at all times regardless of whether it's sensed or not? - Answer-Standing Pilot
What is the barometric pressure at 5000 fr. above sea level? - Answer-12.2 psia
What is the theoretical volume of air that must be mixed with 1 of CH4 to achieve perfect combus...
Plumbing Level 2 Final Review (2) Exam
Questions and Answers
Which pilot ignition type remains on at all times regardless of whether it's sensed or
not? - Answer-Standing Pilot
What is the barometric pressure at 5000 fr. above sea level? - Answer-12.2 psia
What is the theoretical volume of air that must be mixed with 1 cu.ft of CH4 to achieve
perfect combustion? - Answer-10 cu.ft
Name a product of incomplete combustion which is toxic and has a penetrating odor. -
Answer-Aldehydes
What is the total air requirement for a gas appliance, equipped with a draft hood, to
operate safely and efficiently? - Answer-30 cu.ft of air per 1000 btuh input
Name a product of incomplete combustion which has no odor, taste or smell. - Answer-
CO (Carbon Monoxide)
For each 1000 Btu of appliance input _____ cu ft of combustion air is required. -
Answer-10
For each 1000 Btu of appliance input _____ cu ft of dilution air is required. - Answer-15
For each 1000 Btu of appliance input _____ cu ft of excess air is required. - Answer-5
For each 1000 Btu of appliance input _____ cu ft of total air is required. - Answer-30
What is the dilution air requirements for a CH4 appliance with an input rating of 100
MBH? - Answer-1000 cu.ft
What is the dilution air requirements for a CH4 appliance with an input rating of 60 MBH
and a calorific value of 1000 btu/cu.ft? - Answer-900 cu.ft
Which type of combustion requires the exact amount of oxygen to mix with the gas? -
Answer-Perfect (Stoichiometric)
What is added to combustion air to ensure complete combustion? - Answer-Excess Air
What is the boiling temp. for natural gas? - Answer--260 degrees Fahrenheit
Which of the following formulas indicates Perfect (Stoichiometric) combustion of
methane and air? - Answer-CH4 + 2O2 + 4N2 > CO2 2H20 + 8N + Heat
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