Week 6

When a surface is to undergo selective heat treatment, how should it be represented in a technical drawing?

• Using dotted lines around the surface area

• With arrows pointing to the area and a note indicating treatment, such as "HRC 60 ±2"

• By cross-hatching the surface

• By applying a thicker outline to the treated zone

Which of the following is NOT a correct representation of surface treatment specification on a technical drawing?

• Hardness value with tolerance indicated near the treated surface

• General note in the title block referring to surface treatment standards

• Graphical shading to indicate heat-treated zones

• Use of standard surface texture symbols with process notes

Which of the following is true regarding dimension placement and duplication?

• It’s acceptable to place the same dimension in multiple views for emphasis

• Dimensions must be evenly spaced across all views

• Each dimension should appear only once and in the most descriptive view

• Repeating dimensions helps avoid interpretation errors

According to ISO standards, how should a heat treatment specification be indicated on a technical drawing?

• Inside a dimension box with a note

• Using only graphical hatching

• As a special weld symbol modification

• As a note in the title block or next to the view, including hardness value and tolerance

In a sectional view, which of the following is a correct representation rule?

• No hidden lines should be shown in full sections unless necessary

• All cut surfaces are represented with the same hatching direction

• Hidden lines must be drawn behind hatching

• The section plane must always be horizontal

Which of the following conditions would most likely require more than three standard orthographic views to fully describe a part?

• The part is symmetrical in all axes

• The part has complex internal cavities not visible externally

• The part consists of a single cylinder

• The part has uniform cross-section

Which symbol is used to indicate surface hardness from heat treatment?

• Dashed circle

• Diagonal hatch

• Arrow line

• HRC value note

What is the standard way to show radius in technical drawings?

• "Ø" before the number

• "R" before the number

• Write the number alone

• Use a wavy line

In dimensioning, what are extension lines used for?

• Indicating material type

• Pointing to sections

• Extending from object features to dimension lines

• Showing cut surfaces

Which of the following is a type of projection used in technical drawing?

• Vertical

• Orthographic

• Spiral

• Tangent