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Home » Engineering » Civil Engineering » Aptitude Test - 19
1. _____ conslusively determines rights of the parties
A. Judgment
B. Decree
C. Order
D. Judgment
2.The property of the ingredients to separate from each other while placing the concrete is called______?
A. segregation
B. compaction
C. shrinkage
D. segregation
3.Approximate value of shrinkage strain in concrete, is_____?
A. 0.003
B. 0.0003
C. 0.00003
D. 0.003
4.Workability of concrete is directly proportional to________________?
A. aggregate cement ratio
B. time of transit
C. grading of the aggregate
D. aggregate cement ratio
5.The relation between modulus of rupture fcr, splitting strength fcs and direct tensile strength fcl is given by______?
A. tcr � rcs = tct
B. fcr>fcs>fc
C. fcr
D. tcr � rcs = tct
6.Strength of concrete increases with_______?
A. increase in water-cement ratio
B. increase in fineness of cement
C. decrease in curing time
D. increase in water-cement ratio
7.As compared to ordinary portland cement, use of pozzuolanic cement?
A. reduces workability
B. increases bleeding
C. increases shrinkage
D. reduces workability
8.According to IS : 456 -1978, the modulus of elasticity of concrete Ec (in N/mm2) can be taken as?
A. Ec = = 5700
B. Ec = = 570
C. Ec = = 5700fck
D. Ec = = 5700
9.The most commonly used admixture which prolongs the setting and hardening time is_______?
A. gypsum
B. calcium chloride
C. sodium silicate
D. gypsum
10.The strength of concrete after one year as compared to 28 days strength is about____?
A. 10 to 15% more
B. 15 to 20% more
C. 20 to 25% more
D. 10 to 15% more
11.Admixtures which cause early setting, and hardening of concrete are called______?
A. workability admixtures
B. accelerators
C. retarders
D. workability admixtures
12.Increase in the moisture content in concrete______?
A. reduces the strength
B. increases the strength
C. does not change the strength
D. reduces the strength
13.The relation between modulus of rupturefcr and characteristic strength of concrete fck is given by___?
A. fcr=0.35Vf7
B. fcr=0.57f7
C. fcr=0.7Vf7
D. fcr=0.35Vf7
14.The approximate value of the ratio between direct tensile strength and flexural strength is__?
A. 0.33
B. 0.5
C. 0.75
D. 0.33
15.Air entrainment in the concrete increases_______?
A. workability
B. strength
C. the effects of temperature variations
D. workability
16.Workability of concrete is inversely pro�portional to___?
A. time of transit
B. vater-cement ratio
C. the air in the mix
D. time of transit
17.The property of fresh concrete, in which the water in the mix tends to rise to the surface while placing and compacting, is called?
A. segregation
B. bleeding
C. bulking
D. segregation
18.To determine the modulus of rupture, the size of test specimen used is__?
A. 150 x150 x500 mm
B. 100 x100 x700 mm
C. 150 x150 x700 mm
D. 150 x150 x500 mm
19.The percentage of voids in cement is approximately___?
A. 25%
B. 40%
C. 60%
D. 25%
20.Modulus of rupture of concrete is a measure of_______________?
A. flexural tensile strength
B. direct tensile strength
C. compressive strength
D. flexural tensile strength
21.In order to obtain the best workability of concrete, the preferred shape of aggregate is?
A. rounded
B. elongated
C. angular
D. rounded
22.As compared to ordinary portland cement, high alumina cement has______?
A. higher initial setting time but lower final setting time
B. lower initial setting time but higher final setting time
C. higher initial and final setting times
D. higher initial setting time but lower final setting time
23.Bulking of sand is maximum if moisture content is about____?
A. 2%
B. 4%
C. 6%
D. 2%
24.1% of voids in a concrete mix would reduce its strength by about______?
A. 5%
B. 10%
C. 15%
D. 5%
25.Finer grinding of cement___?
A. affects only the early development of strength
B. affects only the ultimate strength
C. Both A and B
D. affects only the early development of strength
26.Poisson�s ratio for concrete?
A. remains constant
B. increases with richer mixes
C. decreases with richer mixes
D. remains constant
27.The factor of safety for____?
A. steel and concrete are same
B. steel is lower than that for concrete
C. steel is higher than that for concrete
D. steel and concrete are same
28.The fineness modulus of fine aggregate is in the range of______________?
A. 2.0 to 3.5
B. 3.5 to 5.0
C. 5.0 to 7.0
D. 2.0 to 3.5
29.The compressive strength of 100 mm cube as compared to 150 mm cube is always______?
A. less
B. more
C. equal
D. less
30.If a beam fails in bond, then its bond strength can be increased most economi-cally by____?
A. increasing the depth of beam
B. using thinner bars but more in number
C. using thicker bars but less in number
D. increasing the depth of beam
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