A thermopile energizes a power unit, either open or closed. Which of the items below would a thermopile hold closed while energized?
An orifice is integral to a pilot burners design. Which of the answers represents the number of different designs for pilot burners?
When weighing different items for comparison, certain standards are needed. Which of the answers below correctly identifies the pressure standard used in these comparisons?
Differential pressure has to be within certain allowable limits described in any gas code. Which of the pressures below would be used to calculate a differential pressure?
There are several basic designs for pilot burners. Which of the designs below would be the pilot most frequently used in the gas industry?
Understanding terms used to describe pressures is a vital to a gasfitter. Which of the terms below would be an expression of pressure?
Certified equipment all has a rating plate attached to them. Which of the answers below is considered optional information on a rating plate?
Products are removed from natural gas in various stages. Which of the answers below correctly identifies the order of the stages in this process?
Electron theory has many parts that define what electricity is. Which of the answers below is best described as "The smallest particle of a substance that has all of the physical and chemical properties of that substance."?
Magnetic fields are inherently created around conductors when electricity passes through it. Which of the answers below directly effects the strength of a magnetic field?
Gas releases energy as is is consumed during combustion. Which of the answers below correctly identifies the amount of Btu released in a cubic foot of Propane gas?
Appliance rating plates contain vital information for installation or servicing. Which of the numbers below corresponds to where the output rating would be?
Appliance rating plates contain vital information for installation or servicing. Which of the numbers below corresponds to where the orifice size would be?
There is a relationship between the 3 components of electricity. Which of the answers below describes this relationship as "An electrical current is proportional to voltage and inversely proportional to resistance.."?
A mixture of products can be separated in a special process. Which of the answers below correctly identifies the the process that separates by the different boiling points of products?
Liquid petroleum gases are a special classification of hydrocarbons. Which of the answers below represents one of the LPG sub-group?
Pilot burners are classified by their ignition sequence. Which of the pilots below would only activate when there was a call for main burner ignition?
Pilot burners are classified by their ignition sequence. Which of the pilots below would burn at all times, even if the main burner is fired?
Certified equipment all has a rating plate attached to them. Which of the answers below is considered optional information on a rating plate?
When weighing different items for comparison, certain standards are needed. Which of the answers below correctly identifies the temperature standard used in these comparisons?
Liquid petroleum gases are a special classification of hydrocarbons. Which of the answers below represents the boiling point of liquid propane?
Which of the terms below would best be described as "A force resisting the motion of solid surfaces, fluid layers, and material elements sliding past each other."?
Several pressure test are performed using a manometer. Which of the the tests below would be done while the main burner operates, downstream of the service regulator?
Pilot burners are classified by their ignition sequence. Which of the pilots below would also be known as a standing pilot?
There are several basic designs for pilot burners. Which of the designs below would be the pilot accomplishes combustion solely through secondary air?
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