CDT Industry Standards & Compliance Regulations 4

Question 1

What is the significance of a 'First Angle' versus 'Third Angle' projection symbol on a drawing?

Accepted Answer

It indicates which projection system was used, affecting the arrangement of views on the drawing

Answer

The projection symbol tells the reader whether first angle (European) or third angle (North American) projection was used, which determines the spatial relationship of views.

Question 2

When a drawing note states 'UNLESS OTHERWISE SPECIFIED, ALL TOLERANCES ±.010,' what type of tolerance is this?

Accepted Answer

General (block) tolerance

Answer

A general or block tolerance applies to all dimensions without individually specified tolerances and is typically stated in the title block or general notes.

Question 3

Which federal regulation requires that drawings for pressure vessels comply with specific safety codes?

Accepted Answer

ASME Boiler and Pressure Vessel Code (BPVC)

Answer

The ASME Boiler and Pressure Vessel Code (BPVC) establishes rules for the design, fabrication, and inspection of pressure vessels to ensure safety.

Question 4

In electrical drafting, which organization publishes the standards for electrical schematic symbols used in the US?

Accepted Answer

IEEE (Institute of Electrical and Electronics Engineers)

Answer

IEEE publishes standards for electrical and electronic schematic symbols, including IEEE Std 315, which is widely referenced in US electrical drafting.

Question 5

What is the purpose of a 'zone' system on a large-format engineering drawing?

Accepted Answer

To provide a coordinate grid that allows specific areas of the drawing to be quickly located

Answer

Zone designations (letters and numbers along drawing borders) create a grid reference system so that specific features or notes can be quickly located.

(CDT) Certified Drafting Technician Practice Test

(CDT) Certified Drafting Technician Practice Test

CDT Industry Standards & Compliance Regulations 4