Concrete Technology MCQ Questions and Answers for Practice

1. A brick scutch should be used to

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

2. A building line is

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

3. A d.p.c.

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

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

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

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

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

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

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

7. A horizontal member used in trench timbering is a

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

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

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

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

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

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

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

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

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

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

13. Coarse aggregate is mainly retained on a sieve of

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

14. Curing of concrete is achieved by providing

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

15. Dry rot in timber is the result of

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