Gasfitting Exam with Complete Solutions
A residential tubing system shall be identified at_____intervals? Correct Ans-Six-Foot
Intervals
Is the use of left and right hand threaded couplings permitted on a gas piping system?
Correct Ans-Yes
Piping or tubing shall be painted or coated when? Correct Ans-When outdoor piping, indoor
piping, or tubing systems are exposed to corrosive atmospheres.
Piping and tubing shall be located at least_______" below a commercial driveway or parking lot.
Correct Ans-24"
For a permanent installation a hose shall not exceed_______ in length? Correct Ans-10 Feet.
The unthreaded portion of a piping outlet shall extend______" through a ceiling and wall.
And____"through a floor? Correct Ans-1" through a ceiling and wall. 2" through a floor.
Piping or tubing extending from one building to another shall have a shutoff valve located?
Correct Ans-At the exit of the first building, and the point of entry of the second building.
A swing joint may not be installed in a ______? Correct Ans-Concealed location.
A construction heater shall be connected by a hose not less than ____' and no more than___'?
Correct Ans-15 Feet and no more than 75 Feet.
A bushing may be used to reduce one pipe size when made of? Correct Ans-Steel.
, A vented appliance may be connected by a hose? Correct Ans-No it cannot.
A drip pocket shall be provided where? Correct Ans-Condensate may collect.
Where a commercial appliance may be affected by vibration, a _____________ may be used?
Correct Ans-a hose connection.
Tubing laid on a rooftop shall be supported? Correct Ans-continuously with treated wood
and planks.
What is the basic function of a gas regulator? Correct Ans-To reduce and maintain a desired
set point pressure while compensating for changes in downstream pressure.
What are the main parts of a self operating regulator? Correct Ans-The orifice (restricting
element), the diaphragm (measuring element),The spring (loading element) The vent while very
important is not considered one of the THREE essential.
The outlet pressure of most residential regulators is set by adjusting the tension on the?
Correct Ans-the spring (loading element)
The volume of gas required for each appliance shall be determined from? Correct Ans-The
appliance rating plate and/or the manufacturer's specifications.
Finished piping and appliance connections shall be checked under? Correct Ans-Working
pressure with either a soap solution or a leak detection device.
An addition to an existing gas line is not subject to table
6.3 when? Correct Ans-It is 20 feet long or is a welded tie-in.
A residential tubing system shall be identified at_____intervals? Correct Ans-Six-Foot
Intervals
Is the use of left and right hand threaded couplings permitted on a gas piping system?
Correct Ans-Yes
Piping or tubing shall be painted or coated when? Correct Ans-When outdoor piping, indoor
piping, or tubing systems are exposed to corrosive atmospheres.
Piping and tubing shall be located at least_______" below a commercial driveway or parking lot.
Correct Ans-24"
For a permanent installation a hose shall not exceed_______ in length? Correct Ans-10 Feet.
The unthreaded portion of a piping outlet shall extend______" through a ceiling and wall.
And____"through a floor? Correct Ans-1" through a ceiling and wall. 2" through a floor.
Piping or tubing extending from one building to another shall have a shutoff valve located?
Correct Ans-At the exit of the first building, and the point of entry of the second building.
A swing joint may not be installed in a ______? Correct Ans-Concealed location.
A construction heater shall be connected by a hose not less than ____' and no more than___'?
Correct Ans-15 Feet and no more than 75 Feet.
A bushing may be used to reduce one pipe size when made of? Correct Ans-Steel.
, A vented appliance may be connected by a hose? Correct Ans-No it cannot.
A drip pocket shall be provided where? Correct Ans-Condensate may collect.
Where a commercial appliance may be affected by vibration, a _____________ may be used?
Correct Ans-a hose connection.
Tubing laid on a rooftop shall be supported? Correct Ans-continuously with treated wood
and planks.
What is the basic function of a gas regulator? Correct Ans-To reduce and maintain a desired
set point pressure while compensating for changes in downstream pressure.
What are the main parts of a self operating regulator? Correct Ans-The orifice (restricting
element), the diaphragm (measuring element),The spring (loading element) The vent while very
important is not considered one of the THREE essential.
The outlet pressure of most residential regulators is set by adjusting the tension on the?
Correct Ans-the spring (loading element)
The volume of gas required for each appliance shall be determined from? Correct Ans-The
appliance rating plate and/or the manufacturer's specifications.
Finished piping and appliance connections shall be checked under? Correct Ans-Working
pressure with either a soap solution or a leak detection device.
An addition to an existing gas line is not subject to table
6.3 when? Correct Ans-It is 20 feet long or is a welded tie-in.
