Pipefitter Blueprint Reading and Symbols 2

Question 1

On an isometric piping drawing, which line type represents a pipe that runs behind or below another pipe in the view?

Accepted Answer

Hidden (dashed) line

Answer

Solid centerline

Answer

Phantom line

Answer

Break line

Question 2

What does the abbreviation 'BW' next to a pipe connection on a P&ID indicate?

Accepted Answer

Butt weld

Answer

Bolted weld

Answer

Butterfly valve weld

Answer

Branch weld

Question 3

On a piping isometric drawing, what information is typically found in the bill of materials (BOM) table?

Accepted Answer

Item numbers, descriptions, quantities, sizes, and material specifications

Answer

Only pipe lengths and diameters

Answer

Weld counts only

Answer

Pressure ratings only

Question 4

What does a '3D' elbow designation mean on a piping drawing?

Accepted Answer

The elbow has a centerline radius equal to 3 times the nominal pipe diameter

Answer

Three-dimensional modeling reference

Answer

Third-drawing revision elbow

Answer

A 3-inch diameter elbow

Question 5

Which ASME standard governs the dimensions of factory-made butt-welding fittings such as elbows, tees, and reducers?

Accepted Answer

ASME B16.9

Answer

ASME B16.5

Answer

ASME B16.11

Answer

ASME B31.3

Question 6

On a piping plan drawing, what does a double-triangle symbol (two triangles meeting at a point) represent at a valve location?

Accepted Answer

A gate valve shown in plan view

Answer

A globe valve in the open position

Answer

A check valve

Answer

A control valve with actuator