G2 Gas Technician Module 15 B
Revised Questions and answers with
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8 things you must know to select a gas regulator. - ✔✔1. Type of gas
2. Max and min rate of flow
3. Max and min inlet pressure
4. Outlet pressure.
5. Range of adjustment
6. Size of pipe connection
7. Type of valve seat
8. Droop
What can undercut pipe threads cause in a regulator? - ✔✔May cause pipe
to enter regulator to far and block sensing passages
,Can you use a leak limiting orifice on inside regulators? - ✔✔Yes
Where would you install an appliance regulator? - ✔✔As close as possible to
the appliance
Where would you not install a regulator? - ✔✔In a high heat zone
What is maximum first stage pressure? - ✔✔10 pisg
On a service regulator which way do you turn the adjustment screw to increase
pressure? - ✔✔Turn clockwise to increase pressure.
Incorrect lock up pressure caused by a plugged vent what to do? - ✔✔Clean
or replace vent.
, Incorrect lock up pressure caused by diaphragm rupture how to fix? -
✔✔Replace regulator
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
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