NEB NotesNepal
Unit 1 • Class 9Construction Technology (Technical Stream) (Tech.3804)

Building Construction Materials (Unit 1)

एकाइ १: भवन निर्माण सामग्रीहरू (Ref: 3804)

Comprehensive study of primary building materials: Clay Bricks, Sand, Stone, Cement (OPC vs PPC), Mortars (Lime, Clay, Cement), Structural Glass, Plastics, Bitumen, and Timber under CDC Ref 3804.

Lesson Summary & Key Concepts

Verified CDC curriculum Ref 3804: Clay Bricks, Sand, Stone, Cement (OPC and PPC), Lime/Clay/Cement Mortars, Glass, Plastics, Bitumen, and Timber.

Textbook Exercises & Solutions

Showing 2 of 2 Solved Questions
Question 1• 4 Marks
Question 2• 4 Marks

High-Yield Exam Focus Questions (1)

CDC Spec Grid Verified

High-probability exam questions curated specifically for Building Construction Materials (Unit 1).

NEB PriorityCompulsory 7-Mark Long Question in Technical Stream Annual Examination7 Marks

Exam Rationale: CDC Ref 3804 Specification Chart: Unit 1 Building Materials (Bricks and Cement).

Quick Revision Takeaways

Common Exam Pitfalls to Avoid

⚠️ Common Error: Using wet weight in the denominator when calculating water absorption.

✓ Correct Approach: Always divide by the original dry weight W1.

Why: Absorption is defined relative to the dry mass of solid brick matter.

Content Provenance & Verification
Editorial Verified & Published
Original Author / ContributorCDC Technical & Vocational Education Division
Verified BySenior Subject Specialist (TU / NEB Panel)
Curriculum Versionv1.0 (CDC 2078/2080 Grid)
Last Verified Date2026-10-23
Legitimate Official Curriculum References
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