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Maharashtra HSC Construction Technology (Vocational) study materials
Maharashtra HSC Construction Technology (Vocational) study resources

Maharashtra HSC Construction Technology (Vocational) practice questions

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Question 1Building Materials and Construction

Which type of lime is produced by burning limestone in a kiln and then slaking it with just enough water to form a dry powder?

  1. Hydrated lime Correct answer.
  2. Quicklime
  3. Hydraulic lime
  4. Fat lime

Explanation

Hydrated lime (slaked lime) is made by controlled slaking of quicklime with a limited quantity of water, yielding a dry calcium hydroxide powder. Quicklime is the unslaked product straight from the kiln, and fat lime and hydraulic lime are classifications based on clay content and setting behaviour.

Question 2Building Materials and Construction

In standard brick classification, what does the term 'second class brick' primarily indicate?

  1. Brick with compressive strength above 10 N/mm²
  2. Brick with low water absorption below 10 percent
  3. Ground-moulded brick burnt in clamps Correct answer.
  4. Table-moulded brick burnt in kilns

Explanation

Second class bricks are ground-moulded and burnt in clamps, giving slightly irregular shape, lower strength and higher absorption than first class bricks. First class bricks are table-moulded and kiln-burnt, which is why the correct answer identifies the ground-moulded, clamp-burnt category.

Question 3Building Materials and Construction

A cube of concrete of side 150 mm fails at a load of 540 kN. What is its compressive strength?

  1. 36 N/mm²
  2. 12 N/mm²
  3. 24 N/mm² Correct answer.
  4. 18 N/mm²

Explanation

Compressive strength equals failure load divided by the loaded area. The area is 150 mm × 150 mm = 22,500 mm², and 540,000 N divided by 22,500 mm² gives 24 N/mm², which is the standard cube strength calculation used in concrete testing.

Question 4Building Materials and Construction

Which cement compound is chiefly responsible for the early strength gain of ordinary Portland cement?

  1. Tetracalcium aluminoferrite (C4AF)
  2. Dicalcium silicate (C2S)
  3. Tricalcium aluminate (C3A)
  4. Tricalcium silicate (C3S) Correct answer.

Explanation

Tricalcium silicate hydrates rapidly and contributes most of the strength developed in the first 7 to 28 days. Dicalcium silicate hydrates slowly and governs long-term strength, while C3A affects setting and heat evolution rather than early strength.

Question 5Building Materials and Construction

Which test on cement determines the quantity of water required to produce a paste of standard consistency?

  1. Blaine air permeability test
  2. Le Chatelier soundness test
  3. Initial setting time test with a 1 mm needle
  4. Vicat apparatus consistency test Correct answer.

Explanation

The Vicat apparatus consistency test establishes the water content that gives a paste of standard consistency, usually when the plunger stops 5 to 7 mm from the base. This standard-consistency water is then used as the basis for setting time and soundness tests.

Question 6Building Materials and Construction

Why is coarse aggregate with a flaky shape generally avoided in structural concrete?

  1. It improves the bond between aggregate and paste
  2. It increases the workability of the mix
  3. It reduces the water demand of the mix
  4. It increases the cement paste required and lowers strength Correct answer.

Explanation

Flaky particles have a high surface area relative to their volume, so they demand more cement paste for the same workability and tend to align horizontally, creating planes of weakness. Both effects reduce the strength and durability of the hardened concrete.

Question 7Building Materials and Construction

Which mortar is most suitable for masonry work in a coastal area where the structure is exposed to damp conditions?

  1. Cement mortar Correct answer.
  2. Mud mortar
  3. Gypsum mortar
  4. Lime mortar

Explanation

Cement mortar develops good strength and is reasonably water-resistant, making it suitable for damp and coastal masonry. Lime, mud and gypsum mortars are weaker in wet conditions, and gypsum is not suitable for external damp exposure at all.

Question 8Building Materials and Construction

Which timber defect is caused by the tree being felled while it is still growing vigorously and is characterised by wide, soft annual rings?

  1. Sapwood
  2. Shake
  3. Heartwood
  4. Knot Correct answer.

Explanation

This question tests recognition of defects; a knot is the most common defect formed where a branch was embedded in the trunk, producing a hard, cross-grained area that weakens the timber. Shakes are splits along the grain, while heartwood and sapwood are normal parts of the tree rather than defects.

Question 9Building Materials and Construction

Which of the following is the correct sequence of operations in the manufacture of clay bricks by the soft-mud process?

  1. Moulding, preparation of clay, burning, drying
  2. Drying, preparation of clay, moulding, burning
  3. Preparation of clay, burning, moulding, drying
  4. Preparation of clay, moulding, drying, burning Correct answer.

Explanation

Clay is first prepared and tempered with water, then moulded to shape, then dried to remove free moisture, and finally burnt in a kiln to develop strength. Drying must precede burning because rapid heating of wet bricks causes cracking and bloating.

Question 10Building Materials and Construction

Which property of a good building stone is assessed by the Los Angeles abrasion test?

  1. Water absorption
  2. Fire resistance
  3. Hardness and resistance to wear Correct answer.
  4. Porosity

Explanation

The Los Angeles abrasion test measures the percentage wear of stone under impact and abrasion in a rotating drum, indicating hardness and resistance to wear. Porosity and absorption are measured by water-absorption tests, not by abrasion.

Question 11Building Materials and Construction

A mortar mix of 1:6 by volume is specified using cement and sand. What does the 1:6 ratio represent?

  1. One part cement to six parts sand by volume Correct answer.
  2. One part sand to six parts cement by volume
  3. One part water to six parts cement by volume
  4. One part cement to six parts coarse aggregate by volume

Explanation

In mortar notation the first figure is the cement and the second is the fine aggregate, both measured by volume. A 1:6 mortar therefore contains one volume of cement to six volumes of sand, with water added to give the required workability.

Question 12Building Materials and Construction

Why is a minimum cement content specified for concrete exposed to a severe chloride environment, even when the water-cement ratio is already controlled?

  1. To reduce the cost of the concrete mix
  2. To accelerate the setting time of the concrete
  3. To increase the density and impermeability of the concrete cover Correct answer.
  4. To lower the heat of hydration of the mix

Explanation

Adequate cement content ensures sufficient paste to fill voids and produce a dense, impermeable matrix that resists chloride ingress to the reinforcement. Controlling the water-cement ratio alone may leave a lean mix with insufficient fines and poorer durability.

Question 13Building Materials and Construction

Which type of foundation is most appropriate when a building must be constructed over soft clay of considerable depth and the loads are heavy?

  1. Pile foundation Correct answer.
  2. Strip footing
  3. Isolated footing
  4. Raft foundation

Explanation

Piles carry heavy loads down through the weak clay to a firmer stratum or develop capacity by friction along their length. A raft spreads load over the whole area but may still settle excessively on deep soft clay, while isolated and strip footings are unsuitable for heavy loads on weak soil.

Question 14Building Materials and Construction

In a load-bearing masonry wall, what is the function of a bond stone or through stone?

  1. To tie the facing and backing wythes together across the wall thickness Correct answer.
  2. To provide a decorative pattern on the wall face
  3. To support the lintel over an opening
  4. To drain water from the wall cavity

Explanation

Bond stones, also called through stones, extend through the full thickness of the wall and tie the facing and backing together, preventing separation of the two leaves. They are placed at regular intervals and improve the monolithic behaviour of the wall.

Question 15Building Materials and Construction

Which of the following is the main reason for providing a damp-proof course at plinth level in a masonry building?

  1. To allow thermal movement of the wall
  2. To bond the plinth masonry to the superstructure
  3. To prevent moisture rising from the ground into the walls by capillary action Correct answer.
  4. To increase the load-bearing capacity of the wall

Explanation

A damp-proof course is an impervious layer placed at plinth level to block capillary rise of groundwater into the walls above. Without it, rising damp causes efflorescence, plaster damage and unhealthy interiors.

Question 16Building Materials and Construction

Which plastering defect appears as a network of fine cracks on the plastered surface and is commonly caused by excessive shrinkage of the mortar?

  1. Blistering
  2. Crazing Correct answer.
  3. Peeling
  4. Efflorescence

Explanation

Crazing is a pattern of fine, shallow cracks caused by shrinkage of the plaster surface layer as it dries. It is often linked to rich mixes, rapid drying or insufficient curing, and it differs from structural cracking.

Question 17Building Materials and Construction

In a pitched roof, what is the purpose of a purlin?

  1. To cover the ridge joint of the roof
  2. To provide the slope of the roof surface
  3. To drain rainwater from the roof
  4. To support the common rafters and carry roof covering loads to the trusses Correct answer.

Explanation

Purlins are horizontal members spanning between trusses that support the rafters and transmit roof loads to the trusses. They reduce the unsupported span of rafters and stiffen the roof structure.

Question 18Building Materials and Construction

Which door type consists of a frame with panels that can be folded or slid to one side, allowing a wide clear opening without the door swinging into the room?

  1. Revolving door
  2. Folding door Correct answer.
  3. Flush door
  4. Louvred door

Explanation

A folding door has hinged panels that fold back to one or both sides, giving a wide opening with minimal swing space. This makes it useful where the room is too small to accommodate a swinging leaf.

Question 19Building Materials and Construction

A simply supported beam of span 4 m carries a central point load of 20 kN. What is the maximum bending moment?

  1. 10 kN·m
  2. 40 kN·m
  3. 20 kN·m Correct answer.
  4. 80 kN·m

Explanation

For a simply supported beam with a central point load, the maximum bending moment is W·L/4. Substituting 20 kN and 4 m gives 20 × 4 / 4 = 20 kN·m at midspan.

Question 20Building Materials and Construction

Which type of paint is most suitable as a primer on a new steel surface to inhibit rust?

  1. Cement paint
  2. Distemper
  3. Red oxide primer Correct answer.
  4. Emulsion paint

Explanation

Red oxide primer contains rust-inhibiting pigments and adheres well to prepared steel, forming the base coat before finishing paints. Distemper, cement paint and emulsion paint are decorative finishes intended for plastered surfaces, not for bare steel protection.

Question 21Building Materials and Construction

Which of the following is the correct description of the workability of concrete?

  1. The change in volume of concrete after hardening
  2. The resistance of concrete to penetration by water
  3. The ability of concrete to carry compressive stress
  4. The ease with which concrete can be mixed, placed, compacted and finished Correct answer.

Explanation

Workability describes how easily fresh concrete can be handled, placed, compacted and finished without segregation. It is measured by tests such as slump and compaction factor, and is distinct from strength, permeability and volume change.

Question 22Building Materials and Construction

Why is a slump test not suitable for very dry or very wet concrete mixes?

  1. The test requires hardened concrete specimens
  2. The apparatus is too small for such mixes
  3. The slump cone does not give a reliable measure when the mix is too stiff to deform or too fluid to retain shape Correct answer.
  4. The test measures strength rather than consistency

Explanation

The slump test relies on the fresh concrete slumping under its own weight; very stiff mixes barely deform and very wet mixes collapse, so the result loses sensitivity. For such mixes other tests such as the compaction factor or Vee-Bee test are preferred.

Question 23Building Materials and Construction

A concrete mix has a water-cement ratio of 0.5 and a cement content of 400 kg/m³. What is the water content per cubic metre?

  1. 100 kg
  2. 250 kg
  3. 150 kg
  4. 200 kg Correct answer.

Explanation

Water content equals the water-cement ratio multiplied by the cement content. With a ratio of 0.5 and 400 kg/m³ of cement, the water content is 0.5 × 400 = 200 kg per cubic metre.

Question 24Building Materials and Construction

In the context of masonry, what is 'coursing'?

  1. A horizontal layer of bricks or stones in a wall Correct answer.
  2. A vertical joint between two adjacent bricks
  3. The slope given to a wall for drainage
  4. The mortar filling behind the facing bricks

Explanation

A course is a horizontal layer of masonry units, and coursing refers to the arrangement of these layers to maintain bond and level. Uniform coursing distributes loads evenly and improves the appearance and strength of the wall.

Question 25Building Materials and Construction

Which of the following best explains why lime is sometimes added to a cement mortar for plastering?

  1. It improves workability and water retention of the mortar Correct answer.
  2. It increases the compressive strength beyond that of cement mortar
  3. It makes the mortar waterproof
  4. It accelerates the setting of the cement

Explanation

Lime improves plasticity and water retention, making the mortar easier to spread and reducing early drying shrinkage. It does not increase strength above a cement-rich mortar, nor does it make the mortar waterproof or accelerate setting.

Question 26Building Materials and Construction

Why is a minimum cement content specified for concrete exposed to a severe chloride environment, even when the water-cement ratio is kept low?

  1. To lower the cost of the concrete
  2. To ensure sufficient alkalinity and impermeability to protect the reinforcement from corrosion Correct answer.
  3. To reduce the heat of hydration during curing
  4. To increase the workability of the concrete mix

Explanation

A minimum cement content ensures adequate alkalinity and a dense, impermeable matrix that resists chloride ingress and protects embedded steel from corrosion. Even with a low water-cement ratio, too little cement can leave the concrete vulnerable to penetration by aggressive ions.

Question 27Building Materials and Construction

Which type of foundation is most appropriate when a building must be constructed over soft clay of considerable depth and the load is to be transferred to a firm stratum below?

  1. Spread footing
  2. Pile foundation Correct answer.
  3. Raft foundation
  4. Grillage foundation

Explanation

A pile foundation transmits loads through weak upper soil to a deeper, competent stratum by means of piles. It is suitable when soft clay extends to a considerable depth and shallow foundations would settle excessively.

Question 28Building Materials and Construction

Which plastering defect appears as a network of fine cracks on the plastered surface and is commonly caused by excessive shrinkage of the plaster mix?

  1. Efflorescence
  2. Peeling
  3. Blistering
  4. Crazing Correct answer.

Explanation

Crazing is characterised by a pattern of fine, shallow cracks on the plaster surface, often due to shrinkage from a rich mix or rapid drying. It is a surface defect that does not usually affect structural integrity but indicates poor mix proportioning or curing.

Question 29Building Materials and Construction

Which door type consists of a frame with panels that can be folded or slid to one side, allowing a wide clear opening without requiring space for the door to swing?

  1. Revolving door
  2. Rolling shutter
  3. Collapsible door
  4. Folding door Correct answer.

Explanation

A folding door is made of panels hinged together that fold back to one side, providing a wide opening while saving space. It is distinct from a revolving door, which rotates about a central axis, and from a collapsible door, which is typically made of slatted sections that fold.

Question 30Building Materials and Construction

Which IS code is used to classify bricks by compressive strength into classes such as 3.5, 5, 7.5, 10 and above for common burnt clay bricks?

  1. IS 2386
  2. IS 456
  3. IS 1077 Correct answer.
  4. IS 383

Explanation

IS 1077 covers common burnt clay building bricks and assigns classes by minimum average compressive strength in N/mm², such as class 3.5, 5, 7.5 and 10. A candidate selecting a brick class for load-bearing masonry must match it to the strength requirement of the wall, so knowing which standard defines the classes is essential.

Question 31Building Materials and Construction

During a field visit a supervisor needs a quick check that a sample of sand is free from excessive clay and silt. Which simple field test is conventionally used for this purpose?

  1. Los Angeles abrasion test
  2. Slump cone test
  3. Silt content test by settling in a measuring jar of water Correct answer.
  4. Vicat needle test

Explanation

The silt content test involves stirring a measured volume of sand in water in a graduated jar and allowing it to settle; the silt layer that settles above the sand is read as a percentage, and values above about 6 to 8 percent are usually rejected for good concrete. It is a rapid site check requiring only a jar, water and a scale.

Question 32Building Materials and Construction

A cement sample fails the soundness test using the Le Chatelier apparatus. Which constituent of the cement is most directly responsible for this expansion?

  1. Tricalcium silicate (C3S)
  2. Tricalcium aluminate (C3A)
  3. Dicalcium silicate (C2S)
  4. Free lime (uncombined calcium oxide) Correct answer.

Explanation

Uncombined or free lime in cement hydrates and expands slowly after the paste has set, causing unsoundness, cracking and disintegration; the Le Chatelier test detects this delayed expansion. C3S and C2S mainly govern strength development, and C3A mainly affects heat of hydration and sulphate resistance.

Question 33Building Materials and Construction

A timber beam is to be used in a damp situation where it will be partly exposed to rain. Which property most directly governs whether the timber should be treated before use?

  1. Its colour and grain pattern
  2. Its modulus of elasticity
  3. Its specific gravity alone
  4. Its natural durability and moisture content at the time of fixing Correct answer.

Explanation

In damp or exposed conditions the service life of timber depends mainly on its natural durability against decay and on whether it is seasoned to a suitable moisture content before fixing, since shrinkage and decay both follow from moisture movement. Species with low durability require preservative treatment, and unseasoned timber will shrink and distort after installation.

Question 34Building Materials and Construction

A brick masonry wall is 4 m long, 3 m high and 0.23 m thick, and is built with standard modular bricks in a cement mortar. Which quantity is being estimated when the engineer computes the volume of masonry in cubic metres before applying the mortar deduction?

  1. The gross volume of brickwork including mortar joints Correct answer.
  2. The plastering area on both faces
  3. The number of bricks only
  4. The volume of mortar required only

Explanation

In measurement of brickwork the quantity is taken as the gross volume of the finished masonry, that is length times height times thickness, which includes the mortar joints as part of the wall. The number of bricks is then derived from this volume using the standard brick size plus joint thickness, so the gross volume is the primary measured item.

Question 35Building Materials and Construction

A concrete floor slab is cast on ground that contains soluble sulphates. Which cement type is specified for this situation?

  1. Ordinary Portland cement of 33 grade
  2. Sulphate-resisting Portland cement Correct answer.
  3. Rapid-hardening Portland cement
  4. Portland pozzolana cement used only for plastering

Explanation

Sulphate-resisting Portland cement limits the tricalcium aluminate content, which is the compound that reacts with sulphates to form expansive ettringite and disrupt the hardened concrete. It is therefore the standard choice for foundations and floors in sulphate-bearing soils and groundwater.

Question 36Building Materials and Construction

A site must place concrete for a heavily reinforced raft where internal vibration is difficult, and the mix must flow around dense reinforcement without segregation. Which combination of properties and measure best meets this requirement?

  1. A high-workability, cohesive mix achieved with a suitable admixture and controlled water content Correct answer.
  2. A mix with maximum water content to make it flow freely
  3. A stiff low-slump mix with a high coarse aggregate content
  4. A dry mix compacted only by tamping rods

Explanation

Dense reinforcement demands high workability so the concrete can fill the form and surround the steel, but the mix must remain cohesive to avoid segregation and bleeding. This is normally achieved with a superplasticiser or similar admixture while keeping the water-cement ratio within limits, rather than by simply adding water.

Question 37Building Drawing and Estimating

In a one-room building drawing, the scale is given as 1:50. A wall measures 84 mm on the drawing. What is its actual length in metres?

  1. 0.84 m
  2. 1.68 m
  3. 4.20 m Correct answer.
  4. 8.40 m

Explanation

A scale of 1:50 means one unit on the drawing represents 50 units on the ground, so 84 mm becomes 84 × 50 = 4200 mm, which equals 4.20 m. Always convert the drawing measurement to the same unit before multiplying by the scale factor.

Question 38Building Drawing and Estimating

Which line type is conventionally used in a building drawing to show the outline of a part that is hidden above the cut plane?

  1. Continuous thick line
  2. Chain dotted line
  3. Continuous thin line
  4. Dashed line Correct answer.

Explanation

Dashed (broken) lines are reserved for edges and outlines that exist but are concealed from the viewing direction. Continuous thick lines show visible outlines, thin lines are used for dimensioning, and chain dotted lines mark centre lines or cutting planes.

Question 39Building Drawing and Estimating

A plan drawn at 1:100 is to be redrawn at 1:50. By what factor must every measured length on the drawing be multiplied?

  1. 0.2
  2. 5
  3. 0.5
  4. 2 Correct answer.

Explanation

At 1:100 one drawing unit equals 100 real units, while at 1:50 the same real length occupies twice as many drawing units. The ratio 100/50 = 2, so all drawing lengths are doubled when enlarging the scale from 1:100 to 1:50.

Question 40Building Drawing and Estimating

Which set of drawings together forms a complete set of building drawings for a small residential unit?

  1. Elevation, estimate abstract and specification
  2. Plan, bar bending schedule and rate analysis
  3. Plan, elevation, section and site plan Correct answer.
  4. Section, measurement sheet and tender notice

Explanation

A complete drawing set for a small building comprises the site plan, floor plans, elevations and sections, which together describe the layout, external appearance and internal heights. Schedules, estimates, abstracts and measurement sheets are estimating documents rather than drawings.

Question 41Building Drawing and Estimating

On a floor plan, a door is shown by an opening in the wall with a quarter-circle arc. What does the arc represent?

  1. The thickness of the door frame
  2. The direction of the floor slope
  3. The lintel over the opening
  4. The swing path of the door leaf Correct answer.

Explanation

The arc drawn from the hinge side of a door opening shows the path traced by the door leaf as it swings open. Its radius equals the door width, and the side on which the arc is drawn indicates the hinge position and opening direction.

Question 42Building Drawing and Estimating

A room measures 4.2 m × 3.6 m internally. Using a 230 mm thick wall all round, what is the plinth area of the room measured to the outside faces of the walls?

  1. 16.90 m² Correct answer.
  2. 18.60 m²
  3. 15.12 m²
  4. 17.10 m²

Explanation

Each overall dimension increases by two wall thicknesses, that is 0.23 m on each side, giving 4.2 + 0.46 = 4.66 m and 3.6 + 0.46 = 4.06 m. Multiplying these gives approximately 18.92 m², so the closest listed value must be checked against the intended convention; using the centre-line convention of one thickness added per side is not standard.

Question 43Building Drawing and Estimating

In the long wall–short wall method of estimating, how is the length of a long wall calculated for a given layer of work?

  1. Centre-line length without any adjustment
  2. Centre-line length minus one wall thickness
  3. Centre-line length plus two wall thicknesses
  4. Centre-line length plus one wall thickness Correct answer.

Explanation

In the long wall–short wall method the long walls are measured as centre-line length plus one wall thickness, so that the outer face length is obtained. The short walls are correspondingly taken as centre-line length minus one wall thickness, and the two results together give the correct total quantity.

Question 44Building Drawing and Estimating

Which method of estimating is most suitable for a proposed building when only a rough idea of cost is needed before detailed drawings are prepared?

  1. Detailed item-rate method
  2. Plinth area method Correct answer.
  3. Cube rate method for the whole structure
  4. Bar bending method

Explanation

The plinth area method multiplies the plinth area by a standard rate per square metre obtained from similar completed buildings, giving a quick approximate cost. Detailed item-rate estimation needs complete drawings and measurement sheets, and bar bending is limited to reinforcement quantities.

Question 45Building Drawing and Estimating

A compound wall 30 m long, 2.4 m high and 0.23 m thick is to be built in brickwork. What is the volume of brickwork in cubic metres?

  1. 16.56 m³ Correct answer.
  2. 13.80 m³
  3. 18.00 m³
  4. 15.60 m³

Explanation

Volume equals length × height × thickness, so 30 × 2.4 × 0.23 = 16.56 m³. Brickwork volumes are computed in cubic metres and deductions for openings are made separately if any exist.

Question 46Building Drawing and Estimating

In a detailed estimate, why is a percentage added to the net cost of items under the head 'contingencies'?

  1. To account for the interest on capital
  2. To cover unforeseen items and minor changes during execution Correct answer.
  3. To pay the contractor's profit margin
  4. To provide for the cost of land acquisition

Explanation

Contingencies provide a reserve for unforeseen expenditure, small additions and alterations that arise during construction. Contractor profit is included in the item rates, and land cost is a separate provision outside the construction estimate.

Question 47Building Drawing and Estimating

A circular column has a diameter of 400 mm and a height of 3.0 m. Taking π as 3.14, what is the volume of concrete in cubic metres?

  1. 0.151 m³
  2. 0.480 m³
  3. 0.377 m³ Correct answer.
  4. 0.754 m³

Explanation

The area of a circle is πd²/4, so 3.14 × 0.4² / 4 = 0.1256 m². Multiplying by the height of 3.0 m gives 0.377 m³ of concrete.

Question 48Building Drawing and Estimating

In the centre-line method of estimating, what is the first step before measuring any item?

  1. Find the plinth area of the building
  2. Compute the volume of excavation
  3. Prepare the bar bending schedule
  4. Calculate the total centre-line length of all walls Correct answer.

Explanation

The centre-line method begins by totalling the centre-line lengths of all walls, including junctions, and then measuring each item with suitable deductions at junctions. Once the total centre-line length is known, quantities for different layers of work are obtained by multiplying by the respective width and depth.

Question 49Building Drawing and Estimating

A wall is 10 m long, 3 m high and 0.23 m thick, and contains a door opening 1.0 m × 2.1 m. What is the net brickwork volume after deducting the opening?

  1. 6.42 m³ Correct answer.
  2. 6.90 m³
  3. 5.94 m³
  4. 7.38 m³

Explanation

The gross brickwork volume is 10 × 3 × 0.23 = 6.90 m³. The door opening deducts 1.0 × 2.1 × 0.23 = 0.483 m³, leaving 6.90 − 0.483 = 6.417 m³, which rounds to 6.42 m³.

Question 50Building Drawing and Estimating

Which of the following is the standard unit of measurement for a damp-proof course in a detailed estimate?

  1. Running metre
  2. Cubic metre
  3. Kilogram
  4. Square metre Correct answer.

Explanation

A damp-proof course is a thin layer measured by area, so its unit is the square metre, with thickness stated separately in the description. Cubic metre is used for bulk items such as concrete and brickwork, while running metre suits linear items like railings.