I85PREP
⌘ K
CPC33020 Bricklaying study materials
CPC33020 Bricklaying study resources

CPC33020 Bricklaying practice questions

One question at a time. Build your CPC33020 Bricklaying understanding.

First 50 of 200 questions. Each one lists the choices, the correct answer, and an explanation. The checker at the top of this page saves progress in this browser when it is available.

Continue in the practice tool above to load more questions, 50 at a time.

Question 1Core units of competency

What is the standard ratio convention used when describing a bricklaying mortar mix such as 1:1:6?

  1. Sand : cement : lime by volume
  2. Cement : sand : water by weight
  3. Cement : lime : sand by volume Correct answer.
  4. Lime : sand : cement by weight

Explanation

Bricklaying mortar mixes are conventionally written with cement first, then lime, then sand, all measured by volume. A 1:1:6 mix therefore means one part cement, one part lime and six parts sand. Water is added to suit workability and is never part of the ratio.

Question 2Core units of competency

Which type of bond is produced when each stretcher is offset by half a brick from the course below, giving maximum strength and no continuous vertical joints?

  1. English bond
  2. Stack bond
  3. Half-bond Correct answer.
  4. Stretcher bond

Explanation

Half-bond, also called half-stretcher bond, offsets every stretcher by half its length so vertical joints never align between courses. This distributes load and avoids a continuous vertical joint. It is the most common bond for single-leaf walls.

Question 3Core units of competency

Why is a brick dampened or briefly soaked before being laid in very hot, dry weather?

  1. To improve the colour match with adjacent bricks
  2. To reduce the weight of the brick for easier lifting
  3. To stop the brick absorbing water from the mortar too quickly Correct answer.
  4. To make the brick expand so joints close up

Explanation

Dry bricks can draw water out of fresh mortar rapidly, leaving the mortar weak and crumbly and reducing adhesion. Damping the brick limits this suction so the mortar cures properly. Over-soaking is avoided because excess surface water makes the mortar sloppy.

Question 4Core units of competency

What is the primary purpose of a spirit level when building a brick wall?

  1. To measure the length of the wall in metres
  2. To mark the position of openings on the wall
  3. To test the hardness of the mortar after curing
  4. To check that courses are horizontal and the wall face is plumb Correct answer.

Explanation

A spirit level uses an air bubble in a curved vial to show whether a surface is horizontal or vertical. Bricklayers use it continuously to keep courses level and the wall face plumb. Checking length, mortar hardness and opening positions are done with other tools or methods.

Question 5Core units of competency

Which personal protective equipment is specifically required when cutting bricks with a powered masonry saw?

  1. Rubber gloves only
  2. A high-visibility vest only
  3. Eye and hearing protection together with respiratory protection Correct answer.
  4. Steel-capped boots only

Explanation

Powered masonry cutting generates flying fragments, high noise levels and fine silica dust. Eye protection, hearing protection and suitable respiratory protection are therefore all needed. Other items such as boots and high-visibility clothing may be site requirements but do not address these specific hazards.

Question 6Core units of competency

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

  1. The width of the wall cavity
  2. The angle of the roof pitch above the wall
  3. The vertical height of a course including its mortar joint Correct answer.
  4. The colour classification of the brick

Explanation

Gauge is the repeated vertical module of one brick plus one mortar joint, commonly about 86 mm for a standard brick with a 10 mm joint. Gauging keeps courses consistent in height so openings and features align. It is unrelated to cavity width, brick colour or roof pitch.

Question 7Core units of competency

Which mortar joint finish is most suitable for external walls exposed to driving rain?

  1. Struck or ironed joint
  2. Flush joint
  3. Weathered joint Correct answer.
  4. Recessed joint

Explanation

A weathered joint is sloped outward from the top of the joint so water runs off rather than collecting. This reduces the risk of rain penetration through the wall. Recessed and flush joints tend to hold water or offer less shedding.

Question 8Core units of competency

A wall is to be built 4.3 m high using bricks with a gauge of 86 mm. Approximately how many courses are required?

  1. 60 courses
  2. 75 courses
  3. 40 courses
  4. 50 courses Correct answer.

Explanation

Divide the total height by the gauge: 4300 mm divided by 86 mm equals 50 courses exactly. Gauging in this way lets the bricklayer plan course heights before starting. The other values do not match the arithmetic.

Question 9Core units of competency

What is the main reason for building a brick wall in a toothed or racked-back end when it will be continued later?

  1. To allow a proper bond to be formed with the future work Correct answer.
  2. To speed up the curing of the mortar
  3. To reduce the number of bricks needed overall
  4. To make the wall easier to demolish

Explanation

A toothed or racked-back end leaves alternate bricks projecting so the next section can be bonded in rather than butted against a straight vertical joint. This maintains the strength and integrity of the wall. It has no effect on brick count, curing speed or demolition.

Question 10Core units of competency

When mixing mortar by hand, what is the correct order of operations?

  1. Add water to dry cement first, then sand and lime
  2. Add all materials and water together and stir once
  3. Mix sand and lime dry, add cement, then add water gradually while turning Correct answer.
  4. Add sand and water first, then cement last

Explanation

Dry ingredients are blended first so the cement and lime are evenly distributed through the sand. Water is then added gradually while the heap is turned to reach a uniform, workable consistency. Mixing water with cement alone risks lumps and an uneven mix.

Question 11Core units of competency

What is the function of wall ties in a cavity brick wall?

  1. To provide a decorative feature on the outer face
  2. To carry the vertical load of the inner leaf
  3. To seal the cavity against water penetration
  4. To connect the two leaves and transfer lateral loads while allowing minor movement Correct answer.

Explanation

Wall ties tie the two leaves together so they act as a composite wall and share lateral loads such as wind. They are designed to allow slight movement and must be correctly spaced and embedded. They do not carry vertical load, decorate the face or seal the cavity.

Question 12Core units of competency

Which statement best describes the purpose of a damp-proof course (DPC) in a brick wall?

  1. To allow the wall to expand and contract freely
  2. To increase the compressive strength of the lower courses
  3. To bond the wall to the concrete floor slab
  4. To prevent moisture rising through the wall from the ground Correct answer.

Explanation

A damp-proof course is an impermeable layer placed near the base of the wall to stop moisture rising by capillary action. It protects the internal environment and the wall fabric above. It does not add strength, act as a floor tie or provide movement accommodation.

Question 13Core units of competency

A bricklayer needs to build a 90-degree corner. Which method gives the most reliable result for the first course?

  1. Aligning the corner with the nearest existing building feature
  2. Eyeballing the corner by sighting along the wall
  3. Measuring equal lengths along both walls and joining the ends
  4. Using the 3-4-5 method with a tape to establish a right angle Correct answer.

Explanation

The 3-4-5 method applies Pythagoras' theorem to set out a true right angle accurately. Measuring 3 units along one line, 4 along the other and adjusting until the diagonal is 5 units gives a reliable square corner. Sighting and equal-length methods are far less accurate.

Question 14Core units of competency

What is the recommended maximum height a single-leaf brick wall should be raised in one day to avoid mortar being crushed by the weight above?

  1. About 3.0 m
  2. About 4.5 m
  3. About 1.5 m Correct answer.
  4. About 0.5 m

Explanation

Fresh mortar needs time to gain strength before it carries much load. Raising roughly 1.5 m per day is the usual guidance so the lower courses are not overstressed. Building much higher in one day risks settlement and loss of bond strength.

Question 15Core units of competency

Which type of brick is fired at a very high temperature so that it becomes dense, strong and low in water absorption, making it suitable for damp situations?

  1. Engineering brick Correct answer.
  2. Common brick
  3. Handmade brick
  4. Fletton brick

Explanation

Engineering bricks are fired to a high temperature, producing a dense, strong, low-absorption unit. These properties suit retaining walls, manholes and other damp or load-bearing situations. Common, fletton and handmade bricks are generally more porous and less strong.

Question 16Core units of competency

Why must a mortar be discarded once it has begun to set, even if it can be re-tempered with water?

  1. It becomes too expensive to keep adding water
  2. The hydration products formed cannot be re-formed, so strength and bond are lost Correct answer.
  3. It expands and cracks the wall during curing
  4. Its colour becomes unacceptable for the finished wall

Explanation

Once cement has begun to hydrate and set, the chemical bonds that form cannot be reversed by adding water. Re-tempering therefore produces a weaker mortar with poor adhesion. Discarding set mortar protects the strength and durability of the work.

Question 17Core units of competency

Which situation most clearly calls for the inclusion of a movement joint in a brick wall?

  1. A long continuous wall run of 20 m without other joints Correct answer.
  2. A short garden wall 3 m long
  3. A wall built entirely of engineering bricks
  4. A wall with a rendered finish

Explanation

Brickwork expands and contracts with moisture and temperature, and long continuous runs accumulate movement. Movement joints at intervals relieve this and prevent random cracking. Short walls, brick type and render finish do not by themselves create the same need.

Question 18Core units of competency

What is the purpose of a bond beam or reinforced course in a brick wall?

  1. To increase the rate of mortar curing
  2. To improve the appearance of the wall face
  3. To allow the wall to be built without a foundation
  4. To distribute concentrated loads and provide lateral restraint Correct answer.

Explanation

A bond beam or reinforced course contains steel reinforcement in mortar or concrete within the brickwork. It spreads concentrated loads and provides lateral restraint, improving structural behaviour. It is not decorative, does not speed curing and cannot replace a foundation.

Question 19Core units of competency

A bricklayer is laying a wall alongside a concrete beam and must ensure the brickwork does not carry the beam's load. Which detail achieves this?

  1. Leave a movement gap or use a slip plane so the beam bears on its own supports Correct answer.
  2. Increase the mortar strength in the top course
  3. Tie the beam to the wall with wall ties
  4. Bed the beam directly onto the brickwork with a thick mortar joint

Explanation

Where a beam is supported independently, the brickwork beneath or beside it must not be allowed to pick up load. A gap or slip plane prevents load transfer and allows movement. Bedding, tying or strengthening the mortar would transfer load into the wall.

Question 20Core units of competency

Why is it good practice to keep the perpends (vertical joints) in a stretcher-bond wall evenly spaced rather than allowing wide and narrow joints?

  1. It ensures the bond is maintained and loads are spread evenly Correct answer.
  2. It makes the wall cheaper to build
  3. It removes the need for a damp-proof course
  4. It allows more bricks to be laid per hour

Explanation

Even perpends keep the bond correct so no continuous vertical joint forms and loads spread through the wall. Irregular joints weaken the bond and look poor. Cost, speed and damp-proofing are separate considerations.

Question 21Core units of competency

What is the correct action if a newly built brick pier is found to be slightly out of plumb while the mortar is still green?

  1. Ignore it because piers do not need to be plumb
  2. Continue building and correct it at the top
  3. Carefully dismantle and rebuild the affected courses while the mortar is still soft Correct answer.
  4. Fill the gap with extra mortar and leave it

Explanation

Green mortar allows the work to be taken down and rebuilt without damaging the bricks. Correcting early prevents the error accumulating over subsequent courses. Continuing, patching or ignoring the fault leaves a permanently defective pier.

Question 22Core units of competency

Which combination of factors most directly determines the compressive strength of a finished brick masonry wall?

  1. Brick strength, mortar strength and the quality of the bond between them Correct answer.
  2. Number of wall ties, render thickness and paint finish
  3. Wall length, wall height and roof pitch
  4. Brick colour, mortar colour and joint finish

Explanation

Masonry compressive strength depends on the strength of the units, the strength of the mortar and how well the two act together through a good bond. Colour, dimensions and finishes do not govern compressive capacity. Ties and render affect other aspects such as lateral stability and weather protection.

Question 23Core units of competency

A wall is to be built with a course height of 86 mm and must finish exactly at a lintel 2.15 m above the base. What is the best approach to ensure the top course fits without an oversized joint?

  1. Lower the lintel to suit whatever height the wall reaches
  2. Cut the top course bricks thinner to fit the gap
  3. Build normally and fill the remaining gap with a thick mortar bed
  4. Calculate the number of courses and adjust the joint thickness slightly so the courses divide evenly Correct answer.

Explanation

Gauging the wall beforehand allows the joint thickness to be adjusted within acceptable limits so whole courses finish at the required height. This avoids one very thick joint at the top. Packing, cutting bricks thinner or moving the lintel all compromise the work.

Question 24Core units of competency

Which of the following is the most appropriate way to store bricks on site before use?

  1. Stacked loosely on bare ground in a single layer
  2. Soaked in water until required
  3. On a firm, level base, off the ground and protected from excessive rain Correct answer.
  4. Piled against the partly built wall for convenience

Explanation

Bricks should be kept on a firm, level base and off the ground to prevent contamination and settlement. Covering or protecting them from heavy rain avoids over-saturation. Leaning them against the wall or soaking them is not good practice.

Question 25Core units of competency

What is the main purpose of a line and pins when laying a brick course?

  1. To measure the compressive strength of the mortar
  2. To prevent the bricks from absorbing water
  3. To provide a straight reference for aligning the face of the bricks Correct answer.
  4. To hold the wall ties in position

Explanation

A line stretched between pins gives a straight, level reference along the face of the wall. The bricklayer lays each brick to the line so courses stay straight and true. The line does not test strength, hold ties or control absorption.

Question 26Core units of competency

Which tool is used to check that a brick course is level across its length?

  1. Brick bolster
  2. Club hammer
  3. Jointer
  4. Spirit level Correct answer.

Explanation

A spirit level contains a sealed vial with a bubble that sits between two marks when the tool is held truly horizontal, so it reads the level of the course directly. Bolsters, hammers and jointers do not measure level.

Question 27Core units of competency

What is the standard ratio range for a general-purpose cement-lime mortar used in normal external brickwork?

  1. 1:0:3 only
  2. 1:4:1 (cement:lime:sand)
  3. 3:1:1 (cement:lime:sand)
  4. 1:1:6 to 1:2:9 (cement:lime:sand) Correct answer.

Explanation

General-purpose masonry mortars are commonly batched between about 1:1:6 and 1:2:9 cement:lime:sand by volume, giving adequate strength and workability. Ratios that are far too rich or too lean fall outside accepted practice for normal external walls.

Question 28Core units of competency

Why is the frog of a brick normally placed uppermost when laying in a wall?

  1. So that the brick is easier to cut with a bolster
  2. So the mortar bed fills the frog and forms a mechanical key with the brick above Correct answer.
  3. So that water can collect in the depression
  4. So the brick can be laid without any mortar beneath it

Explanation

Placing the frog up lets the bed joint mortar press into the recess, creating a mechanical key that improves bond and helps spread load. It has nothing to do with cutting or with omitting mortar.

Question 29Core units of competency

Which personal protective equipment is most important when cutting bricks with a powered cut-off saw?

  1. A high-visibility vest only
  2. Cotton gloves only
  3. Eye and face protection with a dust mask Correct answer.
  4. Steel-capped boots only

Explanation

Powered brick cutting throws abrasive dust and fragments at high speed, so eye and face protection plus respiratory protection against silica dust are essential. The other items offer no protection to the eyes or lungs.

Question 30Core units of competency

What does a 'half-batten' or storey rod help a bricklayer to control?

  1. The colour of the finished brickwork
  2. The water content of the mortar
  3. The width of the cavity insulation
  4. The height of successive courses and openings Correct answer.

Explanation

A storey rod is marked with the cumulative course heights, so it is used to transfer and check course levels at openings, sills and lintels. It does not measure colour, mortar water or insulation width.

Question 31Core units of competency

A wall is built with a gauge of 75 mm per course. How many courses are needed to reach a height of 1.5 m?

  1. 25
  2. 20 Correct answer.
  3. 30
  4. 15

Explanation

Dividing the total height by the course height gives 1500 mm divided by 75 mm, which equals 20 courses. The other figures come from using the wrong divisor.

Question 32Core units of competency

Why are bricks usually wetted or dampened before laying in hot, dry weather?

  1. To stop them absorbing water from the mortar before it can set Correct answer.
  2. To make them heavier and more stable on the line
  3. To reduce the amount of sand required in the mix
  4. To prevent the bricks from changing colour

Explanation

Dry bricks can suck water rapidly out of the mortar, leaving it too dry to bond and cure properly. Damping the units reduces this suction so the mortar retains enough water to develop strength.

Question 33Core units of competency

Which bond is produced by laying alternate courses entirely of stretchers and headers, giving good longitudinal and transverse strength?

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

Explanation

English bond alternates full header courses with full stretcher courses, so no vertical joint runs through more than one course and both directions are tied. Stretcher bond uses only stretchers, stack bond aligns joints, and garden wall bond mixes three stretchers to one header.

Question 34Core units of competency

What is the purpose of a plumb rule or plumb bob when building a pier?

  1. To check that the faces are truly vertical Correct answer.
  2. To check the moisture of the bricks
  3. To measure the mortar ratio
  4. To count the number of courses

Explanation

A plumb line hangs vertically under gravity, so comparing a face against it shows whether the work is leaning. It does not measure mix proportions, course counts or brick moisture.

Question 35Core units of competency

A bricklayer must set out a right angle for a rectangular building corner. Which method gives a reliable check?

  1. Measure 2 m along each line and check the diagonal is 2 m
  2. Measure 4 m along one line and 5 m along the other, then check the diagonal is 6 m
  3. Measure 3 m along each line and check the diagonal is 3 m
  4. Measure 3 m along one line and 4 m along the other, then check the diagonal is 5 m Correct answer.

Explanation

The 3-4-5 relationship satisfies Pythagoras, since 3 squared plus 4 squared equals 5 squared, so a 5 m diagonal confirms a true right angle. The other combinations do not satisfy the theorem.

Question 36Core units of competency

Why is it important to fill all head joints (perpends) fully with mortar in a loadbearing wall?

  1. Empty joints improve the appearance of the finished face
  2. Empty joints reduce bond and allow water and air to pass through the wall Correct answer.
  3. Empty joints make the wall lighter and therefore stronger
  4. Empty joints allow the wall to expand freely

Explanation

Full perpends transfer stress between units and keep the wall weathertight, whereas voids break the bond and create paths for moisture and draughts. Reduced weight does not make a wall stronger, and appearance and movement are managed by other means.

Question 37Core units of competency

Which unit is typically used where a strong, dense, low-absorption face brick is required for severe exposure?

  1. Handmade stock brick
  2. Engineering brick Correct answer.
  3. Fletton-type brick
  4. Common brick

Explanation

Engineering bricks are manufactured to achieve high compressive strength and low water absorption, making them suitable for damp-proof courses and severe exposure. Common, fletton and stock bricks are generally weaker and more absorbent.

Question 38Core units of competency

What is the main consequence of using a mortar that is much stronger than the bricks it joins?

  1. Cracks tend to form in the bricks rather than in the joints Correct answer.
  2. The bricks absorb less water from the mortar
  3. The wall becomes more flexible under load
  4. The wall expands permanently

Explanation

Masonry should be built with mortar weaker than the units so that minor movement is absorbed by the joints. An over-strong mortar forces the stress into the bricks, which may then crack or spall.

Question 39Core units of competency

Why should the line be checked for straightness along its full length before a course is laid?

  1. A straight line prevents the bricks from absorbing water
  2. A sagging or kinked line will build a wavy wall that is hard to correct later Correct answer.
  3. A straight line is needed to measure the mortar ratio
  4. The line must be replaced after every course

Explanation

Bricks are laid to the line, so any sag or kink is reproduced course after course and produces a wall that is out of line. Mortar ratio, line replacement and absorption are unrelated to line straightness.

Question 40Core units of competency

A bricklayer needs to form a reliable bond at a stopped end that will be joined to later work. Which method should be used?

  1. Leave the last course projecting as a cantilever
  2. Fill the end joint with dry sand
  3. Build the end square and butt the next work against it without bonding
  4. Rake out a toothed end and protect the exposed joints until work resumes Correct answer.

Explanation

A toothed or racked-back end exposes alternate bricks so the later work can interlock and continue the bond. Building square and butting on gives a straight vertical joint with no bond, and dry sand provides no structural connection.

Question 41Core units of competency

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

  1. To act as a damp-proof course
  2. To carry the masonry above the opening and transfer the load to the wall on each side Correct answer.
  3. To provide a fixing for the roof covering
  4. To hold the window frame in place permanently

Explanation

A lintel spans the opening and supports the brickwork above it, passing that load to the abutments. Window frames, damp-proof courses and roof fixings are handled by other components.

Question 42Core units of competency

Why is a cavity tray fitted above an opening such as a window in a cavity wall?

  1. To tie the two leaves of the wall together
  2. To increase the thermal resistance of the cavity
  3. To collect any water that enters the cavity and discharge it to the outer face Correct answer.
  4. To provide a fixing for the window frame

Explanation

A cavity tray intercepts moisture that penetrates the outer leaf and leads it out through weep holes, keeping the inner leaf dry. Insulation, ties and frame fixings are separate functions.

Question 43Core units of competency

Which action best protects freshly built brickwork from frost damage?

  1. Leave the mortar joints raked out to drain
  2. Spray the work with water at the end of each day
  3. Add extra sand to the mortar to speed setting
  4. Cover the work with insulating sheeting and avoid laying when temperatures are forecast to fall below freezing Correct answer.

Explanation

Fresh mortar contains free water that expands on freezing and can destroy the joint, so work should be covered and laying avoided in freezing conditions. Wetting the work or altering the mix would worsen the risk.

Question 44Core units of competency

What is the purpose of a screed or mortar bed laid on the foundation before the first course?

  1. To bond the bricks to the foundation steel
  2. To raise the wall above the damp-proof course
  3. To colour the base of the wall
  4. To provide a level, even base so the first course sits true and load is spread Correct answer.

Explanation

The first course must be fully and evenly bedded so that all subsequent courses are level and loads are distributed. The bed is not a decorative layer, a damp-proof course, or a connection to reinforcement.

Question 45Core units of competency

Which factor most affects how much mortar shrinkage occurs in a bed joint?

  1. The colour of the bricks
  2. The length of the line used
  3. The water content and cement content of the mix Correct answer.
  4. The thickness of the damp-proof course

Explanation

Shrinkage is driven by the amount of water in the mix and the cement paste content, both of which reduce volume as the mortar dries and cures. Brick colour, DPC thickness and line length do not control shrinkage.

Question 46Core units of competency

A bricklayer is building a wall 6 m long with a gauge of 86 mm and must place a movement joint. What is the usual reason for limiting the length of brickwork between movement joints?

  1. To reduce the number of bricks required
  2. To make the wall easier to paint
  3. To allow the mortar to dry out faster
  4. To accommodate moisture and thermal movement without random cracking Correct answer.

Explanation

Brickwork expands and contracts with moisture and temperature, and unrestrained length concentrates that movement into random cracks. Movement joints divide the wall into panels that can move without distress.

Question 47Core units of competency

What is the correct way to strike a joint on a fair-faced wall that will receive no further finish?

  1. Leave the mortar proud and chip it off after hardening
  2. Fill the joint flush with dry cement powder
  3. Rake the joint out to about 20 mm deep
  4. Tool the joint to a neat profile while the mortar is still green Correct answer.

Explanation

Jointing is done with a jointer while the mortar is still workable so the profile is compacted and neat. Deep raking, chipping hardened mortar and dry powder all damage or weaken the joint.

Question 48Core units of competency

Why must a wall tie in a cavity wall be installed with a slight fall towards the outer leaf?

  1. So any water running down the tie is directed to the outer leaf and not the inner leaf Correct answer.
  2. So the tie expands with heat without buckling
  3. So the tie can be removed more easily later
  4. So the cavity insulation stays dry

Explanation

A fall towards the outer leaf makes any moisture on the tie run outwards rather than tracking across to the inner leaf. Ease of removal, thermal expansion and insulation dryness are not the purpose.

Question 49Core units of competency

Which statement correctly describes the purpose of a weephole in a cavity wall?

  1. To allow water collected on a cavity tray to drain to the outside Correct answer.
  2. To allow air to circulate through the cavity insulation
  3. To provide a fixing point for wall ties
  4. To let mortar droppings escape during construction

Explanation

Weepholes are left in the outer leaf just above a cavity tray so trapped water can escape. They are not ventilation openings, tie fixings or a route for mortar droppings.

Question 50Core units of competency

Why is it important to keep the mortar bed an even thickness along a course?

  1. Uneven beds cause the course to vary in height and the wall to go out of level Correct answer.
  2. Uneven beds reduce the need for wall ties
  3. Uneven beds improve the bond with the course above
  4. Uneven beds make the mortar set faster

Explanation

The gauge depends on a consistent bed thickness, so a bed that varies in depth makes the course rise or fall and throws out the levels above. Setting speed, tie requirements and bond quality are not improved by uneven beds.