Construction Materials Online Test - Paper 2

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Total Questions: 30
Time Allotted: 30 minutes
Passing Score: 50%
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Certificate: No
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1 / 30

1. During burning of dried bricks, the sequence of chemical changes that take place, is as under

a) vitrification-dehydration-oxidation

b) vitrification-oxidation-dehydration

c) dehydration-oxidation-vitrification

d) dehydration-vitrification-oxidation

2 / 30

2. *The ingredient which gives the desired color to a paint is called

a) base

b) pigment

c) vehicle

d) solvent

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3. For normal consistency, the penetration in Vicat apparatus should be between

a) 35 to 38 mm

b) >40 mm

c) 20 to 30mm

d) 30 to 35mm

4 / 30

4. The pigment used in paints for corrosion resistance is

a) red lead

b) white lead

c) gypsum

d) ferrous oxide

5 / 30

5. *Turpentine oil is used in paints as a

a) base

b) thinner

c) drier

d) vehicle

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6. *Pug mill is used for

a) clay preparation

b) clay moulding

c) brick drying

d) brick burning

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7. Excessive free lime and excessive magnesia present in the cement make the cement

a) unsound

b) have very low initial setting time

c) have very light compressive strength

d) gain strength faster

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8. When a bitumen is graded by 75/15, the figure 75 represents

a) viscosity in centipoises

b) softening point in ┬░C

c) fire point in ┬░C

d) flash point in ┬░C

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9. *The lime suitable for use underwater is

a) fat lime

b) poor lime

c) hydraulic lime

d) all of the above

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10. The building stone can be dressed very easily

a) just after quarrying

b) after seasoning

c) after some months of quarrying

d) any time

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11. *Softening point test (x/y) for bitumen is done at a temperature of upper numeral indicates the softening temperature (x┬░C) while the lower numeral indicates

a) viscosity

b) softening point

c) penetration

d) flash point

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12. *The defects in wood due to hardening is

a) knots

b) rind galls

c) burls

d) none of the above

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13. Ultimate strength to cement is provided by:

a) Tricalcium silicate

b) Dicalcium silicate

c) Tricalcium aluminate

d) Tetra-calcium alumino ferrite

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14. The crushing strength of 1st class brick should not be less than

a) 25 kg/cm^2

b) 70 kg/cm^2

c) 105 kg/cm^2

d) 140 kg/cm^2

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15. The maximum percentage of water absorption of 2nd class bricks in 24 hrs should be limited to

a) 10%

b) 15%

c) 20%

d) 24%

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16. Basalt (TBE-GPI) is a

a) extrusive igneous rock

b) intrusive igneous rock

c) sedimentary rock

d) metamorphic rock

17 / 30

17. Quick setting cement is used

a) for the construction of structures under water

b) to obtain very light strength

c) where resistance to acidic water is required

d) none of the above

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18. *If the molten magma forces itself into an already existing rock in the earth's crust and solidifies there, such a rock is known as

a) metamorphic rock

b) extrusive rock

c) intrusive rock

d) igneous rock

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19. *The function of paint is

a) to give a clean, colorful, and pleasing surface

b) to increase the life of the painted surface

c) to protect the surface from corrosion and other weather effects

d) all of the above

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20. *Flash setting of cement means

a) hydration of cement

b) hardening of cement

c) stiffening of cement without strength development

d) all of the above

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21. *Conglomerate is a

a) sedimentary rock

b) granite rock

c) metamorphic rock

d) all of the above

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22. The soil used for the manufacture of bricks should preferably not contain the following material

a) alkalies

b) pebbles

c) manganese

d) iron oxide

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23. The defects in the growth of timber are called

a) shakes

b) checks

c) both (a) and (b) of above

d) none of the above

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24. The defect caused by the shrinkage of timber is

a) crook

b) cup and bow

c) twist

d) all of the above

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25. Terracotta is used in building for

a) ornamental work

b) insulation

c) storage

d) none of the above

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26. *According to IS399-1963, the weight of the timber is specified at

a) 8% moisture

b) 10% moisture

c) 12% moisture

d) 14% moisture

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27. *Normally the bricks (1st class) obtained from pazawah is about

a) 30%

b) 40%

c) 50%

d) 60%

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28. Plywood is obtained by gluing wooden sheets at a specification of

a) 100 to 150 N/cm^2

b) 60┬░ to 130┬░ C

c) both (a) and (b) of above

d) none of the above

29 / 30

29. Identify the geological classification of rocks

a) calcareous, argillaceous, and silicious

b) organic, semi-organic, and inorganic

c) igneous, sedimentary, and metamorphic

d) stratified, unstratified, and foliated

30 / 30

30. The strength of RHPC for one day is equal to...day of OPC

a) 2 days

b) 3 days

c) 4 days

d) 5 days

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Construction Materials Online Test – Paper 2

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