GAS TECHNICIAN G2 STUDY GUIDE 2025/2026 QUESTIONS
WITH ANSWERS GRADED A+
✔✔Incorrect lock up pressure caused by cut valve seat or worn out seat. How to fix? -
✔✔Replace valve seat or regulator
✔✔Incorrect lock up pressure due to regulator body being twisted. How to fix? -
✔✔Replace regulator
✔✔Sluggish regulator action caused by linkage friction - ✔✔Replace regulator
✔✔Sluggish regulator action caused by a stiff diaphragm. - ✔✔Replace regulator
✔✔Symptoms of incorrect lock up pressure? - ✔✔Pressure is to high, periodic relief
valve opening, and periodic odour of gas near vent area
✔✔Symptoms of a sluggish regulator? - ✔✔Varying pressure or pressure drop when
burner fires.
✔✔What are symptoms of pressure drop at other burners when main burner ignites? -
✔✔No gas at other burners, low fire at other burners, and pilot goes out
✔✔Types of gas meters? - ✔✔1. Bellows
2. Rotary-type
3. Orifice-type
4. Turbine
✔✔Where would you use a bellow type gas meter? - ✔✔Domestic and commercial
installs
✔✔Where would you use rotary type gas meters? - ✔✔Commercial and industrial
applications.
✔✔What can a meter be made of? - ✔✔Tin, cast iron, pressed steel and aluminium
✔✔What meter does not require lubrication? - ✔✔Bellow meter
✔✔How much pressure is required to get a bellow moving? - ✔✔0.5" w.c.
✔✔How do you transport a meter? - ✔✔Upright
✔✔What does the number on a gas meter indicate? - ✔✔Indicates btu capcity
, ✔✔What are some uses of a gas meter? - ✔✔Measure consumption, test for leaks, and
to measure input of an appliance.
✔✔What state is propane in while under pressure in a container? - ✔✔Both liquid and
vapour
✔✔When pressure of propane changes what also changes directly? - ✔✔Temperature
✔✔How many times will liquid propane expand when released to atmosphere? - ✔✔270
times
✔✔How much does one pound of liquid propane expand when converted to vapour? -
✔✔8.5 cubic feet
✔✔How much do you fill a propane tank? - ✔✔80%
✔✔What are the 2 classifications of propane containers? - ✔✔Tank or cylinder
✔✔What is the largest cylinder manufactured? - ✔✔1000 lbs
✔✔What is the relief valve set at for a propane cylinder? - ✔✔375 psig
✔✔What is the relief valve set at for a propane tank? - ✔✔250 psig
✔✔What standards are propane cylinders set by? - ✔✔Transport Canada
✔✔What standards are propane tanks set by? - ✔✔Boiler and pressure vessel act
(ASME)
✔✔What is the purpose of purging a propane cylinder? - ✔✔To remove H2O
✔✔How is a liquid withdrawal valve threaded? - ✔✔Right handed
✔✔Where is a liquid withdrawal valve installed? - ✔✔Threaded into the bottom or
internally piped via a dip tube.
✔✔What must a liquid withdrawal valve be equipped with? - ✔✔Must have an excess
flow valve
✔✔An excess flow valve allows liquid and vapour to flow which way? - ✔✔Both ways.
✔✔When does an excess flow valve start controlling the flow? - ✔✔When it exceeds 1.5
times normal flow
WITH ANSWERS GRADED A+
✔✔Incorrect lock up pressure caused by cut valve seat or worn out seat. How to fix? -
✔✔Replace valve seat or regulator
✔✔Incorrect lock up pressure due to regulator body being twisted. How to fix? -
✔✔Replace regulator
✔✔Sluggish regulator action caused by linkage friction - ✔✔Replace regulator
✔✔Sluggish regulator action caused by a stiff diaphragm. - ✔✔Replace regulator
✔✔Symptoms of incorrect lock up pressure? - ✔✔Pressure is to high, periodic relief
valve opening, and periodic odour of gas near vent area
✔✔Symptoms of a sluggish regulator? - ✔✔Varying pressure or pressure drop when
burner fires.
✔✔What are symptoms of pressure drop at other burners when main burner ignites? -
✔✔No gas at other burners, low fire at other burners, and pilot goes out
✔✔Types of gas meters? - ✔✔1. Bellows
2. Rotary-type
3. Orifice-type
4. Turbine
✔✔Where would you use a bellow type gas meter? - ✔✔Domestic and commercial
installs
✔✔Where would you use rotary type gas meters? - ✔✔Commercial and industrial
applications.
✔✔What can a meter be made of? - ✔✔Tin, cast iron, pressed steel and aluminium
✔✔What meter does not require lubrication? - ✔✔Bellow meter
✔✔How much pressure is required to get a bellow moving? - ✔✔0.5" w.c.
✔✔How do you transport a meter? - ✔✔Upright
✔✔What does the number on a gas meter indicate? - ✔✔Indicates btu capcity
, ✔✔What are some uses of a gas meter? - ✔✔Measure consumption, test for leaks, and
to measure input of an appliance.
✔✔What state is propane in while under pressure in a container? - ✔✔Both liquid and
vapour
✔✔When pressure of propane changes what also changes directly? - ✔✔Temperature
✔✔How many times will liquid propane expand when released to atmosphere? - ✔✔270
times
✔✔How much does one pound of liquid propane expand when converted to vapour? -
✔✔8.5 cubic feet
✔✔How much do you fill a propane tank? - ✔✔80%
✔✔What are the 2 classifications of propane containers? - ✔✔Tank or cylinder
✔✔What is the largest cylinder manufactured? - ✔✔1000 lbs
✔✔What is the relief valve set at for a propane cylinder? - ✔✔375 psig
✔✔What is the relief valve set at for a propane tank? - ✔✔250 psig
✔✔What standards are propane cylinders set by? - ✔✔Transport Canada
✔✔What standards are propane tanks set by? - ✔✔Boiler and pressure vessel act
(ASME)
✔✔What is the purpose of purging a propane cylinder? - ✔✔To remove H2O
✔✔How is a liquid withdrawal valve threaded? - ✔✔Right handed
✔✔Where is a liquid withdrawal valve installed? - ✔✔Threaded into the bottom or
internally piped via a dip tube.
✔✔What must a liquid withdrawal valve be equipped with? - ✔✔Must have an excess
flow valve
✔✔An excess flow valve allows liquid and vapour to flow which way? - ✔✔Both ways.
✔✔When does an excess flow valve start controlling the flow? - ✔✔When it exceeds 1.5
times normal flow
