Free Basics of Piping Questions and Answers

Question 1

In a plumbing system, a valve is used for:

Accepted Answer

All of these

Answer

Valves are essential components in any piping or plumbing system, serving multiple critical functions. They are used to control the flow rate of fluids, completely isolate sections of a system for maintenance or safety, and regulate pressure to ensure safe and efficient operation. Depending on their design, different types of valves are optimized for these specific purposes, making them indispensable for system management.

Question 2

Another name for a non-return valve is?

Accepted Answer

Check valve

Answer

A non-return valve is commonly known as a check valve. Its primary function is to allow fluid to flow in only one direction and automatically prevent backflow, which can cause damage to pumps, contamination of the system, or other operational issues. This unidirectional flow control is crucial in many piping applications to maintain system integrity and efficiency.

Question 3

What grade of stainless steel is known as acid proof steel?

Accepted Answer

AISI 316

Answer

AISI 316 stainless steel is often referred to as 'acid-proof steel' due to its superior corrosion resistance, especially against chlorides and various acids, compared to AISI 304. This enhanced resistance comes from the addition of molybdenum to its composition. It is widely used in marine environments, chemical processing, and medical applications where high resistance to corrosive media is required.

Question 4

What does isometric indicates' cloud marking mean?

Accepted Answer

Change occurred in Revision

Answer

In piping isometric drawings, a 'cloud' or 'revision cloud' drawn around a specific area indicates that a change has been made to that part of the drawing since the previous revision. This visual cue helps engineers and fabricators quickly identify modifications and ensure they are working with the most up-to-date design information. It's a standard practice for revision control and communication in engineering documentation.

Question 5

Which of the following does not correspond to a flange facing classification?

Accepted Answer

WNRF

Answer

Flange facing classifications describe the design of the sealing surface of a flange, such as Raised Face (RF), Flat Face (FF), and Ring Type Joint (RTJ). WNRF, however, stands for 'Weld Neck Raised Face,' which describes the *type* of flange (Weld Neck) combined with its facing (Raised Face), not solely a facing classification itself. It's a comprehensive description of a specific flange style, not just its sealing surface.

Piping Practice Test

Piping Practice Test

Free Basics of Piping Questions and Answers