Concrete Technology MCQs Quiz Multiple Choice Questions & Answers

1. A brick scutch should be used to

1. adjust quoin bricks
2. cut small bevelled bats
3. cut perforated bricks
4. trim rough-cut bricks

2. A building line is

1. the line in front of which no building is allowed
2. part of a bricklayers tool kit
3. the datum line of a building
4. a line seen through the eyepiece of a surveyors level

3. A d.p.c.

1. provides a level bed
2. provides a bed for floor joists
3. holds back moisture
4. binds the lower courses together

4. A d.p.c. placed under a stone sill should extend on each side of the sill at least

1. 75 mm
2. 100 mm
3. 150 mm
4. 200 mm

5. A disadvantage with clayey subsoils is that in long periods of dry weather they tend to

1. lift
2. shrink
3. explode
4. collapse

6. A horizontal d.p.c. is placed to stop moisure

1. rising up from the ground
2. running down into the foundations
3. passing from the outer leaf to the inner leaf
4. flooding the cavity

7. A horizontal member used in trench timbering is a

1. waling board
2. poling board
3. foot prop
4. puncheon

8. A trench 4.000 m in length, 1.000 m in depth and 1.000 m wide is to be excavated; the sub-soil is clay. The amount to be carted away will be

1. 6.500 m³
2. 4.500 m³
3. 5.00 m³
4. 5.500 m³

9. Backfilling and compaction of trenches should be carried out in layers of

1. 150 mm
2. 200 mm
3. 300 mm
4. 450 mm

10. Before a foundation may be concreted, the natural foundation must be inspected by the

1. clerk of works
2. factory inspector
3. safety officer
4. building control officer

11. Bricks that are subjected to severe weather conditions should be

1. permeable
2. porous
3. dense
4. sulphate resisting

12. Care should be taken when using a plumb rule during periods of

1. strong winds
2. severe frost
3. patchy fog
4. prolonged rain

13. Coarse aggregate is mainly retained on a sieve of

1. 3 mm
2. 4 mm
3. 5 mm
4. 6 mm

14. Curing of concrete is achieved by providing

1. cold surface conditions
2. constant hot air
3. intermittent surface heat
4. damp conditions

15. Dry rot in timber is the result of

1. chemical decay
2. insect attack
3. old age
4. fungal attack

16. Hatching is a method which is used to indicate

1. materials
2. volume
3. density
4. dimensions

17. Having set out a rectangular building, the accurate check for squareness of the corners would be to

1. use an instrument called a sitesquare
2. measure each side to confirm the correct dimensions
3. measure the diagonals
4. place a builders square against each corner

18. Honeycombs in sleeper walls

1. improve speed of construction
2. increase underfloor warmth
3. provide underfloor ventilation
4. reduce the brickwork cost

19. I n order to qualify for the weekly tool allowance, a bricklayer may be expected to provide

1. bevel, square, dividers, carborundum stone
2. dividers, square, boat level, jointer
3. bevel, square, corner blocks, line level
4. corner blocks, jointer, carborundum stone, square

20. If a working drawing is made to a scale of 1 50, a length of 5.5 metres would be shown on the drawing by a length of

1. 55 mm
2. 110 mm
3. 275 mm
4. 550 mm

21. In open timbering, the poling boards are retained in position by using

1. puncheons
2. struts
3. lacings
4. walings

22. In tanking construction the cement mortar fill Is used to

1. increase the wall strength
2. prevent water penetration
3. strengthen the protective wall
4. protect the vertical asphalt

23. Intermediate level points between two previously established levels can be determied by using

1. boning rods
2. builders squares
3. trammel rods
4. gauge staffs

24. Plasticisers used in mortars increase

1. strength
2. density
3. adhesion
4. workability

25. Sand-lime bricks are hardened by

1. steaming in an autoclave
2. firing in a continuous kiln
3. the addition of Portland cement
4. continuous spraying with water

26. Setting-out lines for walls which divide semidetached houses are derived from

1. return profiles
2. gauge staffs
3. single profiles
4. building squares

27. Stabilising a bricklayers line in windy conditions is carried out by using

1. line pins
2. corner blocks
3. heavy lines
4. tingle plates

28. The application of asphalt to basements in order to prevent penetration of water is described as

1. flaunching
2. tanking
3. benching
4. haunching

29. The area of a brick which surrounds the frog is termed the

1. margin
2. stretcher face
3. arris
4. header face

30. The first reading taken from an instrument position is termed the

1. foresight
2. datum sight
3. intermediate sight
4. backsight

31. The horizontal d.p.c. is placed not less than150 mm above the

1. finished floor level
2. foundations
3. external ground level
4. oversite concrete

32. The maximum thickness for hardcore when used below oversite concrete is normally

1. 300 mm
2. 500 mm
3. 400 mm
4. 600 mm

33. The minimum lap for a flexible d.p.c. is

1. 50 mm
2. 75 mm
3. 100 mm
4. 150 mm

34. The number of layers in which the slump cone is filled and the number of times each layer is rodded is

1. 2; 25
2. 3; 25
3. 3; 35
4. 4; 35

35. The type of aggregate used for the manufacture of lightweight concrete blocks is

1. crushed sandstone
2. pulverised fuel ash
3. granite chippings
4. broken old bricks

36. The type of material suitable for a flexible d.p.c. is

1. blue slate
2. bituminous felt
3. engineering bricks
4. mastic asphalt

37. The use of wall plates on the top of sleeper walls is to

1. provide equal distribution of load
2. increase the floor strength
3. reduce. the number of floor joists
4. form a level bedding surface

38. The usual test for the workability of concrete is the

1. compression test
2. sieve test
3. silt test
4. slump test

39. To keep the bed joints to the required thickness, it is advisable to

1. level the work frequently
2. lay the bricks frog-uppermost
3. use the gauge staff regularly
4. take great care with bed joints

40. To prevent the occurrence of dry rot below hollow timber ground floors, it is necessary to

1. ensure all d.p.c.s are correctly placed
2. use only well-seasoned timber
3. put a damp-proof membrane below the oversite concrete
4. ensure a through draught of fresh air