GPT Blueprint Reading & Interpretation 2

Question 1

On a gas piping isometric drawing, what does a dashed line typically represent?

Accepted Answer

Existing piping or piping concealed behind a wall

Answer

Dashed lines on isometric drawings conventionally indicate existing or hidden piping not visible in the current view.

Question 2

A blueprint note reads 'CSST 3/4" CTS TYP.' What does 'TYP.' signify?

Accepted Answer

The dimension or detail applies throughout wherever similar conditions occur

Answer

'TYP.' stands for 'typical' and means the noted specification applies to all similar instances on the drawing.

Question 3

Which drawing view would best show the vertical rise of a gas riser from a basement meter to a first-floor appliance?

Accepted Answer

Section view

Answer

A section (or elevation) view cuts through the building vertically to show height changes and vertical pipe runs.

Question 4

On a gas system blueprint, what does the symbol 'T' inside a circle on a pipe run typically represent?

Accepted Answer

A test point or test tee

Answer

A circled 'T' in gas piping drawings commonly denotes a test point where pressure testing connections are made.

Question 5

A gas blueprint legend shows a symbol for a 'PRV.' What is the function of this device in a gas system?

Accepted Answer

Reduces upstream pressure to a safe, lower downstream pressure

Answer

A Pressure Regulating Valve (PRV) steps down upstream supply pressure to the required lower working pressure downstream.

(GPT) Gas Pipe Technician Certification Practice Test