WorksheetsConstruction Materials 1
Total questions: 50
Worksheet time: 25mins
Which term describes the process that makes wet concrete set and harden through chemical reactions?
Stabilization causing permanent setting and hardening
Curing causing permanent setting and hardening
Hydration causing permanent setting and hardening
Tempering causing permanent setting and hardening
Which group correctly identifies ferrous metals used in construction?
Glass fiber, carbon fiber, polymer composites
Aluminum, copper, and brass alloys
Cast iron, carbon steel, stainless steel
Titanium, magnesium, and nickel alloys
What is the primary difference between the header face and the stretcher face of a brick?
Stretcher face is shorter side
Both faces are identical sides
Header face is shorter side
Header face is longer side
Why are bricks widely used as building materials?
They are cheap and durable
They require specialized tools
They are heavy and porous
They are complex to handle
Which brick type is suited for external walls where appearance matters?
Common bricks used internally
Engineering bricks for below ground
Facing bricks with uniform appearance
Reclaimed bricks for temporary works
Common bricks are typically used for which application?
Internal walls not seen
Load-bearing columns
Decorative facades
Water-exposed retaining walls
Engineering bricks are characterized by which property combination?
Uniform color and texture
Low strength and high absorption
High strength and low absorption
High porosity and low hardness
Why should bricks have low thermal conductivity in buildings?
To reduce structural load
To keep interiors temperate
To allow rapid heat transfer
To improve electrical insulation
Which property makes bricks suitable for encasing steel columns for protection?
Low compressive strength
High water absorption
Good fire resistance
High thermal conductivity
What is the primary objective of concrete mix design?
Reduce aggregate size for better aesthetics
Maximize cement content in every batch
Achieve minimum strength and durability economically
Increase slump to the highest possible value
What happens to required cement proportion as target concrete strength increases?
It becomes irrelevant
It generally increases
It generally decreases slightly
It remains approximately constant
Traditional screed typically consists of:
Cement paste, sand, fine aggregates
Cement paste, gravel, coarse aggregates
Cement paste, lime, clay fines
Gypsum paste, sand, fibers
Which components are typically included in aerated concrete block composition?
Gypsum, lime, clay, wood ash, sodium silicate
Cement, clay, gravel, bitumen, steel fibres
Cement, sand, fly ash, plasticizer, glass
Cement, lime, sand, PFA, aluminium sulphate
Which property is characteristic of aerated concrete blocks compared to dense blocks?
Ultra-high compressive strength
High density with low insulation
Lightweight with good insulation
Very high impact resistance
What is a common limitation of aerated concrete blocks in structural use?
Requires curing for 60 days
Prone to impact damage
Susceptible to chemical attack
Cannot be cut or drilled
What is the primary function of mortar in brick and block construction?
Act as a gap-filling adhesive between units
Increase thermal insulation of masonry walls
Provide decorative color to wall surfaces
Reduce the dead load of masonry structures
Which property best characterizes cement mortar used for joining engineering bricks?
Very strong, very hard, water resistant
Thermally insulating, slow curing, brittle
Lightweight, flexible, vapor permeable
Soft setting, high elasticity, porous
What is the typical mix ratio for cement mortar by sand to cement?
1:2 sand to cement
1:3 sand to cement
3:1 sand to cement
2:1 sand to cement
Why is cement mortar suitable in applications with little structural movement?
Its slow setting allows gradual joint adjustment
Its hardness can resist cracking in stable joints
Its high porosity relieves moisture-induced stresses
Its flexibility accommodates frequent joint movement
Which statement best describes how mortar contributes to load transmission in walls?
Isolates bricks to prevent load sharing
Seals irregular gaps to transmit vertical loads
Creates horizontal cavities to reduce load paths
Adds compressible layers to absorb vertical loads
Why is lime mortar suitable for old stone structures?
It expands more than stonework
It requires no sand in the mix
It forms a rigid waterproof barrier
It matches natural stone characteristics
Compared with plain cement mortar, cement lime mortar is generally:
Less porous, high tensile, slow setting
Less strong, hard, water resistant, quick setting
More strong, porous, slow setting
Equal strength, identical setting time
Which material forms the core of standard plasterboard panels used for interior walls and ceilings?
Cellulose fiber reinforced paper
Polyvinyl chloride foam
Portland cement with sand
Calcium sulfate dihydrate gypsum
What are the typical outer layers that sandwich the gypsum core in plasterboard sheets?
Plastic polyethylene films
Fiberglass woven mats
Thick lining paper layers
Metal foil laminations
Which installation step is commonly performed after plasterboard sheets are screwed to studs?
Prime with alkyd oil primer
Install vapor barrier membrane
Tape joints and apply skim coat
Spray acoustic sealant everywhere
Which property of gypsum helps plasterboard contribute to building safety?
Rapid moisture evaporation
Exceptional tensile strength
High electrical conductivity
Inherent fire resistance
Which statement best describes plasterboard’s role in indoor comfort?
Generates active cooling airflow
Eliminates humidity without ventilation
Provides sound and thermal insulation
Blocks all external noise entirely
Which practical advantage makes plasterboard a popular alternative to traditional lath and plaster?
Greater resistance to flooding
Heavier mass for structural loads
Quicker and easier installation
Superior carved ornamental detail
Which drawback should be considered when selecting paper-faced plasterboard for wet areas?
Cannot be cut with standard tools
Requires special curved studs
Will not tolerate flooding
Produces excessive dust when painted
Which statement compares plasterboard advantages and disadvantages most accurately?
Strong structural framing, but poor insulation
Excellent flood tolerance, though hard to install
High texture and character, yet easily moulded
Smooth finish and recyclable, but prone to cracks
Which statement best describes laminated glass used as safety glass?
Foam-filled cavity between twin glass panes
Chemically etched surface increasing hardness
Single tempered pane with surface hardening
Alternating glass layers bonded to a polymer
An intelligent office wants to switch a meeting room wall from clear to private on demand while moderating solar gain. Which glass best fits this need?
Smart glass with switchable states
Laminated glass with extra layers
Patterned wired glass panel
Low-emissivity glass only
A bathroom window needs daylight but privacy. Which glass is the most appropriate choice?
Clear glass with high transparency
Tempered glass for impact strength
Laminated glass with acoustic layer
Obscure glass with patterned surface
Fibreglass wool is commonly available in which forms?
Precast slabs
Spray-on coatings
Rolls and batts
Boards and loose fill
Which material is noted for allowing retrofit of wall cavity insulation by spraying through holes?
Fibreglass
Polyurethane
Cellulose
Straw
Rock mineral wool production is criticized for which reason?
Incompatible with green roofs
Uses non-renewable silica only
Requires high moisture content
Not environmentally friendly overall
Which material is commonly known as glass wool and used widely in loft insulation?
Fibreglass insulation
Polyurethane insulation
Mineral wool insulation
Cellulose insulation
Where is a damp-proof membrane (DPM) typically placed when using polyethylene?
Around steel columns
Above roof tiles
Inside wall cavities
Under concrete floors
Which application best matches plasticised PVC in buildings?
Vinyl floor coverings
Reinforced concrete rebars
Structural roof trusses
Load-bearing wall panels
A material is needed for coloured, easy-to-clean floor finishes. Which polymer suits this need?
Plasticised PVC sheets
Polyethylene membranes
Thermoset epoxies only
uPVC extrusions
For load-bearing beams, joists, and rafters, which softwood type is noted for greater hardness and bending strength?
Cedar
Whitewood
Redwood
Sprucewood
Whitewood refers to timber from which group of species with similar properties?
Elm, oak, or beech
Spruce, pine, or larch
Cedar, cypress, or fir
Birch, maple, or ash
Which application is most suitable for whitewood based on its properties?
Exterior cladding exposed to weather
Interior structural applications
Decorative hardwood flooring
Marine piling and docks
Which material choice is most cost-effective for a large interior structural frame with moderate loads?
Whitewood members for interior framing
Cedar cladding for interior beams
Redwood decking for interior walls
Hardwood beams for all members
Which use aligns best with oak’s strengths?
Insulation boards
Disposable packaging
Structural beams
Delicate veneers
Which is NOT listed as a manufactured board type here?
MDF
Chipboard
Hardboard
Plywood
Manufactured boards are less likely to exhibit which natural timber defect?
Straight grain
Uniform color
High density
Knots or cracks
Which construction material is made of thin wood veneers with alternating grain directions to improve tensile strength?
MDF made of fine fibres and resin
Solid timber cut from whole logs
Plywood with cross-grained glued plies
Chipboard made from wood chips and resin
Compared to natural timber or plywood, chipboard is generally:
More flexible and structurally superior
Lighter yet stronger, with high durability
Denser but less strong, with poor aesthetics
Equally strong and water resistant
When quarrying slate, how is it prepared for roofing use?
Pressed into molded shingles
Cast into thick uniform panels
Split along its natural grain
Extruded through metal dies
