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SOLAS Bricklaying study materials
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SOLAS Bricklaying practice questions

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Question 1Bricklaying

On a SOLAS bricklaying site, what is the standard nominal thickness of a stretcher brick used in a half-brick wall?

  1. 215 mm
  2. 150 mm
  3. 100 mm
  4. 65 mm Correct answer.

Explanation

A standard brick is 215 mm long, 102.5 mm wide and 65 mm high, so the stretcher face presents a 65 mm course height. The 100 mm figure relates to the brick width, not the course height. Course heights in brickwork are normally set from the 65 mm nominal dimension plus the mortar joint.

Question 2Bricklaying

Which mortar mix designation is normally specified for general-purpose external brickwork in a moderately exposed situation?

  1. 1:3 cement:sand
  2. 1:2:9 cement:lime:sand
  3. 1:½:4½ cement:lime:sand
  4. 1:1:6 cement:lime:sand Correct answer.

Explanation

A 1:1:6 cement:lime:sand mix gives a moderate-strength mortar suitable for general external brickwork and is the common default for facing work. It balances durability with flexibility and allows minor movement. Stronger mixes are reserved for more severe exposure or engineering situations.

Question 3Bricklaying

What is the primary purpose of building in a half-brick wall with a 1:3 bond ratio of stretchers to headers?

  1. To increase the number of face bricks visible
  2. To allow the wall to be built without a foundation
  3. To tie the two leaves of the wall together Correct answer.
  4. To reduce the amount of mortar required

Explanation

Header courses laid across the wall thickness bond the front and back leaves into a single structural mass. Without such bonding a half-brick wall would behave as two thin, unstable skins. The bond also distributes load and resists water penetration through the joint pattern.

Question 4Bricklaying

A bricklayer is setting out a wall and finds the overall length is not a whole number of bricks. What is the standard practice for the closure?

  1. Cut a queen closer at each end of the wall
  2. Use a bat (cut brick) at one end, kept as far from the main elevation as possible Correct answer.
  3. Reduce the mortar joint thickness to zero at the closure
  4. Increase all perpends equally to absorb the difference

Explanation

Closures should be placed where they are least visible, typically at an internal corner or the less prominent end of a wall. Distributing the discrepancy equally across perpends can make joints too wide or too narrow and weaken the work. A single neatly cut bat is the accepted solution.

Question 5Bricklaying

Which type of joint finish is most resistant to rain penetration on an exposed external wall?

  1. Bucket-handle joint
  2. Flush joint
  3. Recessed joint
  4. Weathered joint Correct answer.

Explanation

A weathered joint slopes outward from the top of the brick, shedding water away from the face and reducing the chance of it being driven into the joint. Recessed and flush joints can trap or admit water on exposed elevations. The slope must be formed with a jointer while the mortar is still green.

Question 6Bricklaying

In English bond, what is the appearance of the elevation?

  1. Continuous stretcher courses with occasional headers
  2. A diagonal pattern of headers
  3. Alternate courses of stretchers and headers Correct answer.
  4. All header courses throughout

Explanation

English bond is characterised by alternating whole courses of stretchers and headers, giving a strong, straightforward bond. It is often used for thick or engineering walls because of its strength. The contrasting courses are easy to identify on the elevation.

Question 7Bricklaying

Why should bricks be kept dry but frost-protected before laying in cold weather?

  1. To avoid frozen moisture causing spalling and poor mortar adhesion Correct answer.
  2. To speed up the setting of the mortar
  3. To make the bricks easier to cut
  4. To prevent them from shrinking after laying

Explanation

Bricks that contain frozen moisture can spall when the ice expands, and ice on the surface prevents the mortar from bonding. Dry, frost-protected bricks also avoid introducing excess water into the mix. Work should be covered at night to protect fresh masonry.

Question 8Bricklaying

What does the term 'perp' refer to in bricklaying?

  1. The vertical mortar joint between bricks in a course Correct answer.
  2. The bond pattern on the face
  3. The overall thickness of a wall
  4. The horizontal bed joint

Explanation

Perp is short for perpendicular joint, the vertical mortar joint separating adjacent bricks in the same course. Perpends should be consistent in width and fully filled to maintain bond and weather resistance. The horizontal joint is called the bed joint.

Question 9Bricklaying

When laying an engineering brick for a damp-proof course, which property is most important?

  1. Bright colour and texture
  2. Low water absorption and high compressive strength Correct answer.
  3. Large size and irregular shape
  4. High porosity and light weight

Explanation

Engineering bricks are dense, strong and have low water absorption, which makes them suitable for damp-proof courses and below-ground work. Their resistance to moisture ingress protects the structure above. Porosity and decorative qualities are not relevant to DPC performance.

Question 10Bricklaying

What is the minimum lap recommended for a damp-proof course in a brick wall?

  1. 150 mm
  2. 100 mm Correct answer.
  3. 25 mm
  4. 50 mm

Explanation

A DPC should be lapped at least 100 mm at joints and continued across cavities and around corners. This lap ensures continuity so water cannot track through the joint. The DPC must also be bedded on a full mortar bed and protected from damage.

Question 11Bricklaying

A bricklayer is building a 215 mm solid wall. Which bond is most suitable for strength and stability?

  1. English bond Correct answer.
  2. Flemish bond
  3. Stack bond
  4. Stretcher bond

Explanation

English bond provides strong cross-bonding through alternating header courses and is traditionally used for thick solid walls. Stretcher bond is only suitable for half-brick or cavity leaves because it lacks through-bonding. Flemish bond is decorative but slower and less strong than English bond in thick walls.

Question 12Bricklaying

What is the purpose of a wall tie in a cavity wall?

  1. To form the damp-proof course
  2. To connect the inner and outer leaves Correct answer.
  3. To carry the roof load
  4. To provide a decorative feature

Explanation

Wall ties transfer lateral loads and restrain the two leaves of a cavity wall so they act together. They must be installed at the specified spacing and slope slightly to shed water inward. Correct tie type and material prevent corrosion-related failure.

Question 13Bricklaying

How should a soldier course be set out at a window head?

  1. Bricks laid on end with the long axis vertical, forming a continuous row Correct answer.
  2. Bricks laid flat with the long axis horizontal
  3. Bricks laid on their stretcher face with the long axis vertical
  4. Bricks laid at 45 degrees to the face

Explanation

A soldier course consists of bricks laid on end with their long axis vertical, presenting the stretcher face upward. It is commonly used over openings as a decorative and structural feature. The bricks must be supported by a lintel or arch to carry the load above.

Question 14Bricklaying

Why is it important to keep the cavity clean during construction?

  1. To prevent mortar droppings bridging the damp-proof course Correct answer.
  2. To reduce the weight of the wall
  3. To allow easier installation of wall ties
  4. To improve the appearance of the outer leaf

Explanation

Mortar droppings that collect on cavity trays or ties can bridge the damp-proof course and allow moisture to reach the inner leaf. A cavity board or batten is used to catch droppings as work proceeds. The cavity must be cleaned out before it is closed.

Question 15Bricklaying

What is the correct procedure for cutting a brick to form a half-bat?

  1. Use a bolster chisel on one face only
  2. Strike the brick once in the centre with a hammer
  3. Score all faces and break over a sharp edge Correct answer.
  4. Cut only the stretcher face and snap

Explanation

Scoring all four faces with a bolster or chisel and then breaking over a sharp edge produces a clean, square half-bat. Striking without scoring gives a ragged break that is difficult to lay neatly. Safety glasses and a firm, level surface are essential.

Question 16Bricklaying

A wall is to be built with a face brick that has a high suction rate. What should the bricklayer do before laying?

  1. Coat them with a waterproofing agent
  2. Soak the bricks thoroughly in water
  3. Lay them dry and rely on the mortar
  4. Wet the bricks lightly or use a mortar with improved water retention Correct answer.

Explanation

Highly absorbent bricks can draw water from the mortar too quickly, preventing proper curing and adhesion. Light wetting or a mortar with better water retention helps maintain workability. Bricks should not be saturated, as this can cause floating and weak bond.

Question 17Bricklaying

What is the function of a lintel over a window opening in a brick wall?

  1. To support the wall above the opening Correct answer.
  2. To provide a fixing for window frames
  3. To improve the thermal insulation of the wall
  4. To act as a damp-proof course

Explanation

A lintel carries the load of the masonry above an opening and transfers it to the piers on either side. It must be bedded level and have adequate bearing at each end. Lintels do not normally provide weatherproofing or insulation.

Question 18Bricklaying

When constructing a brick pier, why are bricks often laid with alternating courses rotated through 90 degrees?

  1. To allow the pier to be built without a foundation
  2. To make the pier easier to plaster
  3. To reduce the amount of mortar used
  4. To bond the pier internally and prevent vertical joint alignment Correct answer.

Explanation

Rotating alternate courses creates a bond that ties the pier together in both directions and avoids continuous vertical joints. This gives the pier much greater resistance to lateral loads. Piers are often used to stiffen long walls or support beams.

Question 19Bricklaying

What is the recommended maximum height of brickwork that should be built in one day without allowing the mortar to set?

  1. 3 m
  2. 0.5 m
  3. 1.5 m Correct answer.
  4. 5 m

Explanation

Brickwork is generally limited to about 1.5 m of height per day so that the mortar can set before the weight above is added. Building too high too quickly can cause settlement, bulging or loss of plumb. The actual limit may be adjusted for mortar type and weather.

Question 20Bricklaying

Which factor most affects the choice between a stretcher bond and a Flemish bond for a facing wall?

  1. The type of foundation used
  2. The appearance required and the wall thickness Correct answer.
  3. The compressive strength of the bricks
  4. The colour of the mortar

Explanation

Stretcher bond is used for single-leaf and cavity walls and is quick to lay, while Flemish bond offers a decorative elevation and through-bonding in thicker walls. The decision is therefore driven by aesthetics and the wall's thickness and structural role. Brick strength and foundation type do not determine bond pattern.

Question 21Bricklaying

What does 'gauge' mean in relation to brickwork?

  1. The vertical spacing of courses including the mortar joint Correct answer.
  2. The thickness of the wall
  3. The width of the perpend joint
  4. The colour variation of the bricks

Explanation

Gauge is the vertical module of a course, typically 75 mm for a 65 mm brick plus a 10 mm joint. A gauge rod is used to mark course heights so that window and door openings align correctly. Consistent gauge keeps the brickwork level and true.

Question 22Bricklaying

A bricklayer notices that the mortar in the tub has begun to stiffen. What is the correct action?

  1. Add cement to stiffen it further
  2. Add more water and remix
  3. Use it as bedding mortar for the next course without change
  4. Discard the mortar and mix a fresh batch Correct answer.

Explanation

Mortar that has begun to set should not be revived with water, as this reduces strength and workability. It should be discarded and a fresh batch mixed. Adding cement or water to a stiffened mix alters the designed ratio and is not permitted.

Question 23Bricklaying

Which statement best describes the purpose of a movement joint in a long brick wall?

  1. To provide a fixing point for wall ties
  2. To allow the wall to expand and contract without cracking Correct answer.
  3. To separate different brick colours
  4. To allow the wall to be built without a foundation

Explanation

Movement joints accommodate thermal and moisture movement in long walls, preventing random cracking. They are formed by introducing a compressible filler and sealing the joint against weather. Their spacing depends on the brick type and wall length.

Question 24Bricklaying

In a rat-trap bond, how are the bricks arranged?

  1. Stretchers laid flat with a gap between inner and outer leaves Correct answer.
  2. All bricks laid on end in soldier courses
  3. Bricks laid diagonally in a herringbone pattern
  4. Alternate courses of stretchers and headers with a hollow centre

Explanation

Rat-trap bond uses bricks laid flat with a gap between the leaves, creating a hollow wall that saves material and improves insulation. The bricks are often laid on edge to form the two skins. It is used for garden walls and low-rise structures rather than heavily loaded walls.

Question 25Bricklaying

What is the main reason for striking the mortar joint before it fully hardens?

  1. To reduce the amount of mortar used
  2. To speed up the setting of the mortar
  3. To prevent the bricks from moving
  4. To allow the joint to be finished and compacted while the mortar is workable Correct answer.

Explanation

Mortar must be struck and finished while it is still green, because once it hardens it cannot be compacted or shaped properly. A well-compacted joint is denser and more weather-resistant. Striking also removes excess mortar and gives a neat appearance.

Question 26Bricklaying

A bricklayer is setting out a 215 mm thick solid wall in English bond. In which order should the courses be laid?

  1. Two courses of stretchers followed by two courses of headers
  2. One course of headers followed by one course of stretchers Correct answer.
  3. All courses laid entirely of headers
  4. Alternating stretchers and headers within every course

Explanation

English bond is defined by the strict alternation of a full header course with a full stretcher course, repeated up the wall. This pattern gives maximum longitudinal strength and avoids continuous vertical joints. Mixing stretchers and headers in the same course describes other bonds, not English bond.

Question 27Bricklaying

When mixing a standard bricklaying mortar by volume, which combination gives a typical Class II mortar suitable for general external facing brickwork?

  1. 1 part cement to 1 part sand
  2. 1 part cement to 1 part lime to 6 parts sand Correct answer.
  3. 1 part cement to 6 parts sand
  4. 1 part cement to 3 parts sand

Explanation

A 1:1:6 cement-lime-sand mix is the classic Class II general-purpose mortar, giving good workability and adequate strength for facing work. Straight cement-sand mixes without lime are harsher and need plasticiser. The richer mixes listed are too strong for general facing brickwork and can cause cracking.

Question 28Bricklaying

A bricklayer is building a 1.2 m high boundary wall in a single skin of stretcher bond. Which detail most improves its resistance to wind loading?

  1. Laying the bricks on their sides as headers
  2. Building the wall with a thicker mortar joint
  3. Adding engaged piers at intervals along the wall Correct answer.
  4. Reducing the gauge to increase course count

Explanation

A single-skin wall has little lateral stiffness, so engaged piers or returns at intervals provide the buttressing needed to resist wind. Piers shorten the effective span between supports. Thicker joints, rotated bricks and tighter gauge do not add lateral stability.

Question 29Bricklaying

What is the standard nominal size of a UK clay brick used for setting out modular brickwork?

  1. 215 mm x 102.5 mm x 65 mm Correct answer.
  2. 300 mm x 100 mm x 75 mm
  3. 190 mm x 90 mm x 90 mm
  4. 225 mm x 110 mm x 75 mm

Explanation

The standard UK brick is 215 mm long, 102.5 mm wide and 65 mm high, giving a 75 mm module with a 10 mm joint. Setting out uses this module to keep gauge and perp spacing consistent. The other sizes are block or non-standard brick dimensions.

Question 30Bricklaying

A bricklayer is building a wall against a concrete frame and needs to tie the leaf back to the structure. Which component is designed for this purpose?

  1. A movement joint filler
  2. A cavity tray
  3. A wall starter tie fixed to the frame Correct answer.
  4. A bed-joint reinforcement strip

Explanation

Wall starter ties are fixed to the structural frame and built into the brickwork to transfer lateral loads and restrain the leaf. They allow vertical movement while providing horizontal tie. Reinforcement, trays and joint fillers perform different functions.

Question 31Bricklaying

During setting out, a bricklayer needs to establish a square corner. Which method gives an accurate right angle?

  1. Sighting along the wall by eye
  2. Measuring equal distances along both walls and joining the ends
  3. Using the 3-4-5 triangle method with a tape Correct answer.
  4. Aligning the corner with the nearest window reveal

Explanation

The 3-4-5 triangle, based on Pythagoras, produces a reliable right angle when the two shorter sides are set along the wall lines. It is a standard setting-out technique for corners and returns. Eyeballing or using unrelated features is not accurate enough.

Question 32Bricklaying

A bricklayer is laying a soldier course over a window opening. Which arrangement gives the correct appearance?

  1. Bricks laid flat with long faces showing
  2. Bricks laid on their sides with stretchers showing
  3. Bricks laid diagonally in a herringbone pattern
  4. Bricks stood on end with long faces showing Correct answer.

Explanation

In a soldier course the bricks are stood on end with the long face showing, giving the tall vertical units typical of a window head. This is distinct from a sailor course, where bricks are laid on their sides. The other arrangements do not produce the soldier appearance.

Question 33Bricklaying

A bricklayer is building a chimney stack above roof level. Which detail is essential to prevent rain penetration into the flue?

  1. A flaunching and terminal pot arrangement Correct answer.
  2. A damp-proof course at the base
  3. A course of headers at eaves level
  4. A soldier course at the top

Explanation

The top of a chimney requires flaunching, a sloping mortar cap, around a terminal pot to shed water away from the flue. Without it, rainwater can enter the stack. The other details do not address rain entry at the top of the flue.

Question 34Bricklaying

A bricklayer is laying bricks in very hot, dry weather. Which precaution best prevents mortar drying out too quickly?

  1. Adding more cement to the mix
  2. Wetting the bricks and covering the work Correct answer.
  3. Using a stronger mortar mix
  4. Laying more courses per day

Explanation

In hot weather, bricks and mortar lose moisture rapidly, so wetting the bricks and covering the work reduces premature drying and improves bond. Adding cement or using a richer mix does not solve moisture loss. Laying more courses increases the risk of settlement and cracking.

Question 35Bricklaying

A bricklayer is checking the plumb of a wall. Which tool is most appropriate?

  1. A line and pins
  2. A gauge rod
  3. A spirit level held vertically against the face Correct answer.
  4. A bolster chisel

Explanation

A spirit level used vertically against the face checks plumb, while a gauge rod checks course heights. A line and pins set the line but do not measure plumb directly. A bolster is a cutting tool.

Question 36Bricklaying

A bricklayer needs to cut a brick to form a closer at the end of a wall. Which tool is most suitable for a clean, straight cut?

  1. A brick jointer
  2. A pointing trowel
  3. A club hammer
  4. A bolster chisel and club hammer Correct answer.

Explanation

A bolster chisel struck with a club hammer produces a controlled cut along the brick's face, suitable for a closer. A club hammer alone would shatter the brick. Trowels and jointers are finishing tools.

Question 37Bricklaying

A bricklayer is building a cavity wall and must ensure the two leaves are tied. What is the recommended spacing of wall ties?

  1. Ties at 450 mm horizontal and 450 mm vertical centres Correct answer.
  2. Ties only at openings and corners
  3. One tie per square metre of wall
  4. Ties at 900 mm horizontal and 450 mm vertical centres

Explanation

Wall ties are typically placed at 450 mm horizontal and 450 mm vertical centres, with additional ties around openings. This spacing transfers lateral loads effectively. Wider spacing or ties only at openings leaves large areas unrestrained.

Question 38Bricklaying

A bricklayer is laying a damp-proof course in a wall. Which property is most important for the DPC material?

  1. Flexibility under bending
  2. Impermeability to water Correct answer.
  3. High compressive strength
  4. High thermal insulation

Explanation

The primary function of a DPC is to stop moisture rising through the wall, so impermeability is the essential property. Compressive strength matters but is secondary. Thermal insulation and bending flexibility are not the main requirements.

Question 39Bricklaying

A bricklayer is building a brick pier in a garden wall. Which bonding arrangement improves the pier's strength?

  1. Courses laid with random bond
  2. All courses laid as headers
  3. Alternating courses rotated through 90 degrees Correct answer.
  4. All courses laid as stretchers

Explanation

Rotating alternate courses through 90 degrees in a pier interlocks the bricks and avoids continuous vertical joints, which improves strength. All-stretcher or all-header courses create planes of weakness. Random bond is not a recognised structural arrangement.

Question 40Bricklaying

A bricklayer is building a wall alongside a long concrete path. Which detail allows the wall to expand without cracking?

  1. A soldier course at the top
  2. A DPC at the base of the wall
  3. A thicker mortar joint throughout
  4. A movement joint at intervals along the wall Correct answer.

Explanation

Movement joints accommodate thermal and moisture expansion, preventing random cracking in long walls. They are placed at intervals and at junctions with rigid elements. DPCs, decorative courses and thicker joints do not provide expansion allowance.

Question 41Bricklaying

A bricklayer is pointing a wall and wants a recessed finish. Which tool is most suitable?

  1. A trowel
  2. A brick hammer
  3. A jointing tool with a curved profile Correct answer.
  4. A cold chisel

Explanation

A jointing tool with the appropriate profile shapes the mortar to give a consistent recessed finish. Trowels apply mortar but do not form the profile. Hammers and chisels are for cutting, not pointing.

Question 42Bricklaying

A bricklayer is laying bricks in a stretcher bond wall and needs to maintain the correct gauge. What does gauge refer to?

  1. The height of each course including the joint Correct answer.
  2. The width of the mortar joint only
  3. The length of the brick
  4. The thickness of the wall

Explanation

Gauge is the vertical distance from the top of one course to the top of the next, including the mortar joint, typically 75 mm for standard bricks. It controls course heights and window and door positions. Joint width alone, brick length and wall thickness are separate dimensions.

Question 43Bricklaying

A bricklayer is laying a wall in Flemish bond. What is the appearance of the elevation?

  1. Alternate headers and stretchers in every course Correct answer.
  2. Stretchers in every course with random headers
  3. Headers only in every other course
  4. All stretchers in every course

Explanation

Flemish bond shows alternating headers and stretchers within each course, giving a strong decorative appearance. This differs from English bond, which alternates whole courses. All-stretcher and random patterns are different bonds.

Question 44Bricklaying

A bricklayer is building a wall and notices a vertical crack appearing above a window opening. Which is the most likely cause?

  1. Wetting the bricks before laying
  2. Too much mortar in the joints
  3. Use of a spirit level
  4. Missing or inadequate lintel support Correct answer.

Explanation

Cracks above openings commonly result from inadequate lintel support or insufficient bearing, causing the masonry to sag or spread. Excess mortar, use of a level and wetting bricks do not cause this pattern. The lintel must carry the load safely to the jambs.

Question 45Bricklaying

A bricklayer is working on a site where the temperature is forecast to drop below freezing overnight. Which action best protects fresh brickwork?

  1. Use a richer mortar mix
  2. Cover the work with insulating sheets Correct answer.
  3. Add more water to the mortar
  4. Leave the work uncovered to dry

Explanation

Fresh mortar is vulnerable to frost damage before it sets, so covering with insulating sheets retains heat and prevents ice forming in the joints. Adding water or using a richer mix does not protect against freezing and can worsen damage.

Question 46Bricklaying

A bricklayer is laying bricks for a manhole in a drainage run. Which brick type is most appropriate?

  1. A lightweight insulating brick
  2. A facing brick with high suction
  3. An engineering brick with low absorption Correct answer.
  4. A decorative handmade brick

Explanation

Engineering bricks have low absorption and high strength, making them suitable for below-ground and drainage work where resistance to water and load matters. Facing, insulating and decorative bricks are not intended for this environment.

Question 47Bricklaying

A bricklayer is building a wall in stretcher bond and needs to calculate the number of bricks per square metre for a 215 mm x 65 mm brick with 10 mm joints. Which figure is closest?

  1. 90 bricks
  2. 30 bricks
  3. 60 bricks Correct answer.
  4. 120 bricks

Explanation

With a 75 mm module and a 225 mm module length, one square metre contains about 13.3 courses of 4.4 bricks, giving roughly 60 bricks. This standard figure allows for joints and waste. The other figures are too low or too high for a single-skin wall.

Question 48Bricklaying

A bricklayer is asked to build a decorative garden wall with a curved plan. Which bond is most suitable?

  1. Stretcher bond
  2. English bond
  3. Flemish bond
  4. Header bond Correct answer.

Explanation

Header bond, with all bricks laid as headers, allows the wall to follow a curve more smoothly because the shorter face turns more easily. Stretcher, English and Flemish bonds use longer faces that resist tight curvature. Header bond is traditionally used for curved work.

Question 49Bricklaying

A bricklayer is building a wall and needs to ensure the mortar bed is fully compacted. Which action is correct?

  1. Use a dry mortar mix
  2. Press the brick firmly into the bed and tap with the trowel handle Correct answer.
  3. Apply mortar only to the ends of the brick
  4. Lay the brick gently without pressure

Explanation

Pressing and tapping the brick into a full mortar bed compacts the mortar and ensures good adhesion and a consistent joint thickness. Laying without pressure leaves voids. Dry mixes and end-only mortar do not produce a sound bed.

Question 50Bricklaying

A bricklayer is inspecting a completed wall and finds that the perps are not aligned vertically from course to course. Which term describes this fault?

  1. Corbelling
  2. Broken bond Correct answer.
  3. Toothing
  4. Racking back

Explanation

Broken bond occurs when vertical joints do not line up correctly from course to course, weakening the wall and spoiling appearance. Racking back is stepping the end of a wall, corbelling is projecting courses, and toothing is leaving a jagged end for future bonding.