1. Question 1 of 25

   Joseph Aspdin, who patented Portland cement in 1824, was a

   A German chemist B French engineer C British bricklayer D American architect
2. Question 2 of 25

   The initial setting time of ordinary Portland cement should be

   A Not more than 1 minute B Not less than 30 minutes C Exactly 5 hours D Not less than 24 hours
3. Question 3 of 25

   Aluminium frames resist corrosion because they

   A Do not react with oxygen at all B Contain zinc C Form a protective oxide layer D Are painted
4. Question 4 of 25

   Standard concrete cube tests for compressive strength are done on cubes of side

   A 150 mm, after 28 days B 10 mm, after 1 day C 1 m, after 1 year D 15 mm, after 3 hours
5. Question 5 of 25

   Corrosion of steel bars in concrete is a serious problem in coastal cities mainly due to

   A Calcium ions B Chloride ions from salt C Nitrogen D Excess sunlight
6. Question 6 of 25

   Galvanised iron sheets are coated with

   A Copper B Zinc C Tin D Lead
7. Question 7 of 25

   Steel bars are placed in concrete because concrete is

   A Weak in compression B Soluble in water C Weak in tension but strong in compression D Lighter than steel
8. Question 8 of 25

   Window glass is made by heating sand with

   A Salt and gypsum B Cement and clay C Soda ash and limestone D Iron and carbon
9. Question 9 of 25

   Steel is an alloy of iron and a small percentage of

   A Zinc B Copper C Tin D Carbon
10. Question 10 of 25

    The slump test is used to measure the

    A Strength of hardened concrete B Temperature of cement C Colour of aggregate D Workability of fresh concrete
11. Question 11 of 25

    Ordinary Portland cement is made mainly from

    A Sand and salt B Limestone and clay C Gypsum and marble D Iron and carbon
12. Question 12 of 25

    The compound in cement mainly responsible for early strength is

    A Gypsum B Calcium chloride C Sodium carbonate D Tricalcium silicate
13. Question 13 of 25

    Granite, commonly used for kitchen counters and floors, is an

    A Igneous rock B Sedimentary rock C Metamorphic rock D Organic material
14. Question 14 of 25

    Superplasticisers in concrete are used to

    A Increase workability without adding extra water B Increase the setting time only C Colour the concrete D Make it float
15. Question 15 of 25

    Sand used in mortar and concrete is called

    A Fine aggregate B Coarse aggregate C Binder D Admixture
16. Question 16 of 25

    Concrete is a mixture of

    A Cement, sand, coarse aggregate and water B Cement and water only C Sand and clay D Bitumen and gravel only
17. Question 17 of 25

    Bricks are made by shaping clay and then

    A Freezing it B Mixing it with sugar C Burning it in a kiln D Rolling it in oil
18. Question 18 of 25

    Steel and concrete work well together in RCC because they have

    A Similar coefficients of thermal expansion and bond well B The same density C The same colour D The same melting point
19. Question 19 of 25

    The black sticky material used for road surfaces is

    A Gypsum B Bitumen C Marble D Lime
20. Question 20 of 25

    Marble is a metamorphic rock formed from

    A Granite B Sandstone C Basalt D Limestone
21. Question 21 of 25

    A little gypsum is added to cement to

    A Increase its colour B Make it waterproof C Control the setting time D Reduce its cost only
22. Question 22 of 25

    Autoclaved aerated concrete (AAC) blocks are popular because they are

    A Heavier than clay bricks B Lightweight and good insulators C Made of steel D Waterproof by nature
23. Question 23 of 25

    Curing of concrete means

    A Keeping it moist for several days so the cement can fully hydrate B Drying it in the sun C Heating it D Painting it
24. Question 24 of 25

    A lower water-cement ratio generally gives concrete that is

    A Weaker B Lighter in colour C Softer D Stronger and more durable
25. Question 25 of 25

    Mortar used between bricks is a mixture of

    A Cement and gravel only B Sand and bitumen C Lime and glass D Cement, sand and water

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