1. Which one is not a chemically inactive pore filling material?
a. Aluminium
b. Chalk
c. Silicate of soda
d. None
2. Chemically active pore fillers the setting of concrete.
a. Accelerates
b. Decrease
c. Retards
d. No change
3. Chemically inactive pore fillers the workability.
a. Decrease
b. Increase
c. Don’t affect
d. Improve
4. What is the average particle size of cement?
a. 100 microns
b. 75 microns
c. 45 microns
d. 15 microns
5. What is the meaning of soundness of cement?
a. Ability to retain volume after setting.
b. Ability to form strong and sound structure
c. Ability to make ringing noise when struck
d. Ability to flow when mixed
6. Alumina in excess causes _
a. Inceases the strength of the cement
b. Reduces the strength of the cement
c. No change
d. Sometimes increase or decrease the strength of the cement
7. Excess in lime causes
a. The cement to shrink and integrate
b. The cement to shrink and disintegrate
c. The cement to expand and integrate
d. The cement to expand and disintegrate
8. Silica in excess causes
a. The cement to set slowly
b. The cement to set quickly
c. The cement to expand
d. None of the mentioned
9. Which compound gives the colour to the cement?
a. Lime
b. Alumina
c. Iron Oxide
d. Silica
10. Which cement contains high percentage of C3S and less percentageof
C2S?
a. Low Heat Cement
b. Quick Setting Cement
c. Rapid Hardening Cement
d. Ordinary Portland Cement
11. According to geological origin, aggregates is/are classified into
types.
a. 2
b. 1
c. 4
d. 5
12. According to size, aggregates is/are classified into types.
a. 4
b. 1
c. 2
d. 5
13. Crushed stone, gravel and ordinary sand are examples of normal
weight aggregate. They are commonly used in manufacture of normal
weight concrete, asphalt concrete and roadway sub-base.
a. True
b. False
14. What is the total percentage of aggregates in concrete by volume?a. 50-
60%
b. 60-75%
c. 45%
d. None of the mentioned
15. Los Angeles machine consists of circular drum of internal diameter
mm and length mm.
a. 700, 700
b. 520, 520
c. 520, 700
d. 700, 520
16. The loss in weight should not exceed 12 percent when tested with
sodium sulphate and 18 percent with magnesium sulphate solution.
a. False
b. True
17. A maximum value of percent is allowed for WBM base
course in Indian conditions.
a. 20
b. 30
c. 50
d. 40
18. Aggregates to be used for wearing course, the impact value shouldn’t
exceed percent.
a. 20
b. 40
c. 50
d. 30
19. If compaction factor of concrete is .90, then workability is
a. Low
b. Very low
c. Medium
d. None of above
20. Concrete placed in cold weather will take time to gain
strength.
a. More
b. Less
c. No
d. Equal to hot weather
21. The compressive strength required from structural
consideration.
a. Minimum
b. Nominal
c. Maximum
d. No
22. has designated the concrete mixes into a number of
grades as M10, M15.
a. IS 456-2000
b. IS 456-2010
c. IS 513-1999
d. IS 465-2000
23. Maximum nominal size of aggregates to be used in concrete may beas
large as possible within the limits prescribed by
a. IS 456-2000
b. IS 456-2010
c. IS 513-1999
d. IS 465-2000
24. Maximum water-cement ratio and/or maximum cement content togive
adequate durability for the particular site conditions. It helps to avoid
shrinkage cracking due to temp cycle in mass concrete.
a. True
b. False
25. Which of the following statement is correct?
a. As the internal friction of aggregates increases, the workability of concrete
decreases.
b. Harshness in concrete mix increases if finer aggregates to fill the voids in
coarseaggregates are less.
c. All of above
d. none of the above
26. The first coat in sand faced finish is applied in cement
sand mortar.
a. 1:2
b. 1:3
c. 1:1
d. 1:4
27. In sand faced finish, the thickness of the second coat is
a. 8 mm
b. 12 mm
c. 10 mm
d. 18 mm
28. Pumping be not used in case of concreting works.
a. True
b. False
29. What is water proofing admixtures?
a. Water repellent materials
b.Water fair material
c.Water absorption material
d.Water adsorption material
30. The final operation of finishing floors, is known as
a. Screeding
b. Floating
c. Trowelling
d. Finishing
Civil engineering 2 year
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