ACtE08 · Chapter 8Demo2 · Set 2🏛️ Past Licensure QuestionID: 13643b31
In engineering and technical drawing, what is the primary recommended use of a 'B' grade pencil?
In engineering and technical drawing, what is the primary recommended use of a 'B' grade pencil?
Multiple Choice Options
- A✓ Correct Option
Heavy sketching, dark outlining, and shading
- B
Initial construction guidelines
- C
Dimensioning and lettering guidelines
- D
Center lines and section lines
Detailed Technical Solution & Explanation
Pencil leads are graded by hardness and blackness:
•
H Grades (9H to H): Contain more clay binder, producing hard, light, sharp lines ideal for construction lines, layout grids, and guide lines that must not smudge.
•
HB Grade: Medium hardness used for general lettering, dimensions, and border lines.
•
B Grades (B to 9B): Contain more graphite, producing soft, dark, thick lines ideal for heavy sketching, art, freehand drawing, and shading.
Option Analysis:
•
Option A (Heavy sketching, dark outlining, and shading): Correct; B-grade pencils are soft and black, designed for dark shading and heavy sketching.
•
Option B (Initial construction guidelines): Incorrect; hard pencils (2H, 3H, 4H) are used for light construction lines.
•
Option C (Dimensioning and lettering guidelines): Incorrect; 2H/H pencils are used for guidelines.
•
Option D (Center lines and section lines): Incorrect; hard pencils are used for thin, crisp section lines.
Reference: Demo2 · Set 2NEC Licensure Syllabus