CE-302 Construction Materials - Nov 2022 Question Paper

Under each question, How to answer lists the points an answer should cover, outlined by CampusPrep from the syllabus. Check the details against your textbook.

1. 7 Marks
   aExplain the classification of stones in detail with specifications.
   How to answer

   • Geological classification: Igneous, Sedimentary, Metamorphic
   • Physical classification: Stratified, Unstratified, Foliated
   • Chemical classification: Siliceous, Argillaceous, Calcareous
   • Practical engineering specifications and requirements for building stones
2. 7 Marks
   bClearly explain the manufacturing process of Brick along with its characteristics.
   How to answer

   • Steps in brick manufacturing: Preparation of clay (unsoiling, digging, weathering, blending, tempering)
   • Moulding: Hand moulding vs machine moulding
   • Drying of green bricks: Natural/artificial
   • Burning: Clamps and kilns (Hoffman, Bull's trench)
   • Characteristics of good quality bricks (color, shape, hardness, water absorption, crushing strength)
3. 7 Marks
   aWhat are the ingredients of concrete and explain the chemical compositions of various ingredients and mention types of concrete?
   How to answer

   • Ingredients of concrete: Cement, fine aggregate (sand), coarse aggregate, water, admixtures
   • Chemical composition of Portland cement (CaO, SiO2, Al2O3, Fe2O3, etc.) and Bogue's compounds
   • Types of concrete based on strength, density, and application (plain, reinforced, prestressed, lightweight, high-strength)
4. 7 Marks
   bWrite about clay-fly ash brick table and Hand molding brick table.
   How to answer

   • Definition and composition of clay-fly ash bricks
   • Description of moulding tables and apparatus used for table moulding of bricks
   • Hand moulding process on tables versus ground moulding
   • Advantages of table moulding for uniform shape and quality
5. 7 Marks
   aExplain various defects in timber and justify the engineering properties of timber.
   How to answer

   • Defects due to natural forces (knots, shakes, twisted fibres, rind galls)
   • Defects due to fungi (dry rot, wet rot) and insects
   • Defects due to seasoning and conversion
   • Engineering properties of timber: compressive, tensile, and bending strength, durability, elasticity, and specific gravity
6. 7 Marks
   bWhat is the need of wood Substitutes and what are applications of wood products?
   How to answer

   • Need for wood substitutes: Deforestation, cost, susceptibility to termites/fire/moisture, conservation of natural forests
   • Types of engineered wood/substitutes: Plywood, particle board, MDF, veneers, laminates, UPVC, aluminum
   • Applications of wood products in construction, furniture, partitioning, and interiors
7. 7 Marks
   aExplain clearly about Thermal and optical properties of glass.
   How to answer

   • Thermal properties: Thermal conductivity, coefficient of linear expansion, thermal shock resistance, solar heat gain coefficient (SHGC)
   • Optical properties: Visible light transmission (VLT), reflectance, refractive index, absorption
   • Significance of thermal and optical performance in modern building glazing and energy efficiency
8. 7 Marks
   bWhat are types of gypsum boards and their uses?
   How to answer

   • Definition and composition of gypsum boards
   • Types of gypsum boards: Regular/standard, Type X (fire-resistant), moisture-resistant (green board), water-resistant, soundproof board
   • Applications: False ceilings, partition walls, wall linings, acoustic insulation, fire protection
9. 14 Marks
   Write in detail short on following materials: a) Types of Roofing b) Types of Flooring c) Asbestos pipes
   How to answer

   • Types of roofing: Pitched/sloped roofs, flat roofs, shell/curved roofs, roofing materials (GI sheets, tiles, shingles)
   • Types of flooring: Cement concrete, mosaic/terrazzo, tiled, marble/granite, timber flooring
   • Asbestos cement pipes: Composition, manufacturing, applications in drainage/water supply, and health/environmental considerations
10. 7 Marks
    aExplain the composition of oil paints and characteristic of an ideal paints.
    How to answer

    • Composition of oil paints: Base (white lead, red lead, zinc white), Vehicle/binder (linseed oil), Pigment (coloring agent), Driers (litharge), Thinner (turpentine)
    • Characteristics of ideal paint: Good covering power, uniform consistency, durability, resistance to weather and cracking, quick drying, smooth glossy finish
11. 7 Marks
    bWrite short notes on French Polish and Wax polish.
    How to answer

    • French polish: Composition (shellac dissolved in methylated spirit), application method with a cloth pad, properties, high-gloss finish
    • Wax polish: Composition (beeswax, carnauba wax, turpentine), application technique, soft sheen finish, maintenance on timber
12. 14 Marks
    Briefly discuss with exact specifications on following terms: a) Bitumen b) Ultra poly Vinyl
    How to answer

    • Bitumen: Definition, source, grading (penetration, viscosity, VG-10/30/40), engineering properties (softening point, ductility, flash point), specifications
    • Ultra poly Vinyl (UPVC): Structure, mechanical strength, chemical resistance, rigid formulation, applications in window frames, doors, and pipes
13. 14 Marks
    What are the Various Water proofing materials and Thermal insulating materials explain in detail.
    How to answer

    • Waterproofing materials: Cementitious waterproofing, liquid waterproofing membrane, bituminous coating and membranes, polyurethane liquid membrane, crystalline waterproofing
    • Thermal insulating materials: Glass wool, mineral wool / rockwool, expanded polystyrene (EPS), extruded polystyrene (XPS), polyurethane foam (PUF)
    • Mechanism of insulation and moisture protection in buildings