CDT Industry Standards & Compliance Regulations 3

Question 1

Which line type is used to represent hidden edges in a standard orthographic view per ASME Y14.2?

Accepted Answer

Dashed (hidden) line

Answer

ASME Y14.2 specifies that hidden edges are represented by a series of short dashes (hidden lines) on engineering drawings.

Question 2

What does GD&T stand for in engineering drawing practice?

Accepted Answer

Geometric Dimensioning and Tolerancing

Answer

GD&T stands for Geometric Dimensioning and Tolerancing, a symbolic language used to define allowable variation in part geometry.

Question 3

In the context of compliance regulations, what does a 'change order' on a construction drawing set typically require?

Accepted Answer

Authorization signatures from designated approving parties before implementation

Answer

A change order must be authorized by designated approving parties (typically the owner, architect, and contractor) before changes can be implemented.

Question 4

Which AWS standard governs welding symbols used on engineering drawings?

Accepted Answer

AWS A2.4

Answer

AWS A2.4 is the standard that defines the symbols for welding, brazing, and nondestructive examination used on engineering drawings.

Question 5

When a drawing calls out a surface finish of 125 Ra, what does 'Ra' represent?

Accepted Answer

Arithmetic average roughness of a surface

Answer

Ra is the arithmetic average of surface roughness deviations measured from the mean line, expressed in microinches or micrometers.

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