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GAS FITTING INFORMATION Questions And Answers
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GAS FITTING INFORMATION Questions And Answers
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GAS FITTING INFORMATION Questions AndAnswers
What is required when CSST is connected directly to a gas meter? Correct Ans-The gas meter
must be supported
The pressure on the liquid at the bottom of a liquid-filled container is Correct Ans-greater
than the pressure of the liquid at the top
elow the surface of mercury, the pressure at any point will be: Correct Ans-13.6 times
greater than at the same depth in water
At the same temperature, the absolute pressure of gas will be doubled if the volume is:
Correct Ans-halved
An SAE number refers to a liquid's Correct Ans-viscosity
Bernoulli's principle states that Correct Ans-when a fluid's velocity is high, its pressure is low
What is one advantage of using parallel circuits rather than a series circuit Correct Ans-the
ability to de-energize one leg of the circuit without affecting the others
Which type of copper tube has green identification lettering? Correct Ans-Green
What type of plastic pipe is used for underground gas pipe? Correct Ans-Polyethylene
, What word defines the space between a penetrating item and whatever surrounds it, such as
the sides of an opening or a sleeve? Correct Ans-annular space
The supply voltage of a safety control circuit for gas or oil-fired appliances shall not exceed:
Correct Ans-120volts
Thermostat mv drop Correct Ans-110
high limit mv drop Correct Ans-10
main valve Correct Ans-70
What is the gas system pressure limitation for the holder of a Class B Certificate of
Qualification? Correct Ans-NO LIMITATION ON PRESSURE
A gasfitter finds an appliance in an unsafe condition with a faulty venting system. What is the
first step that should be taken? Correct Ans-PLACE IT OUT OF SERVICE
When a gas system is activated, who must sign a Gas Notification of Completion, Installation or
Alteration form Correct Ans-THE HOLDER OF THE PERMIT
What is the specific gravity of 2 ft³ of natural gas? Correct Ans-.6
What is the heat content of 2 ft³ of CH₄? Correct Ans-2000 BTUs
What term best defines the amount of heat available in a fuel gas? Correct Ans-CALORIFIC
VALUE
What is the calorific value of C₃H₈? Correct Ans-2500
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