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This set of Concrete Technology and Design Multiple Choice Questions & Answers (MCQs) focuses on Concrete Technology And Design Set 8
Q1 | Permissible compressive strength of M 200 concrete grade is
- 100 kg/cm2
- 150 kg/cm2
- 200 kg/cm2
- 250 kg/cm2
Q2 | The minimum diameter of longitudinal bars in a column is
- 6 mm
- 8 mm
- 12 mm
- 16 mm
Q3 | The high strength of rapid hardening cement at early stage, is due to its
- finer grinding
- burning at high temperature
- increased lime cement
- higher content of tricalcium
Q4 | Sand requiring a high water cement ratio, belongs to
- zone i
- zone ii
- zone iii
- zone iv
Q5 | Minimum grade of concrete to be used in reinforced concrete as per IS: 4561978 is
- m 15
- m 20
- m 10
- m 25
Q6 | While compacting the concrete by a mechanical vibrator, the slump should not exceed
- 2.5 cm
- 5.0 cm
- 7.5 cm
- 10 cm
Q7 | Non-uniform compaction may cause the concrete
- porous
- non-homogeneous
- reduced strength
- all the above
Q8 | Modulus of rupture of concrete is a measure of
- flexural tensile strength
- direct tensile strength
- compressive strength
- split tensile strength
Q9 | M10 grade of concrete approximates
- 1 : 3 : 6 mix
- 1 : 1 : 2 mix
- 1 : 2 : 4 mix
- 1 : 1.5 : 3 mix
Q10 | Higher workability of concrete is required if the structure is
- made with cement concrete
- thick and reinforced
- thin and heavily reinforced
- thick and heavily reinforced
Q11 | For a cantilever of effective depth of 0.5 m, the maximum span to satisfy vertical deflection limit is
- 3.5 m
- 4 m
- 4.5 m
- 5 m
Q12 | The bulk density of aggregates does not depend upon:
- size and shape of aggregates
- specific gravity of aggregates
- grading of aggregates
- size and shape of the container
Q13 | How long will it take for the concrete to achieve 100% of its strength?
- 7 days
- 14 days
- 21 days
- 28 days
Q14 | A higher modular ratio shows
- higher compressive strength of concrete
- lower compressive strength of concrete
- higher tensile strength of steel
- lower tensile strength of steel
Q15 | For the construction of cement concrete floor, the maximum permissible size of aggregate, is
- 4 mm
- 6 mm
- 8 mm
- 10 mm
Q16 | The specifications of a cement bag for storage, are
- weight 50 kg
- height 18 cm
- plan area 3000 sq. cm
- all the above
Q17 | The main reinforcement in the heel of a T-shaped R.C. retaining wall is provided on
- top face perpendicular to wall
- bottom face perpendicular to wall
- both top and bottom faces perpendicular to wall
- none of the above
Q18 | Separation of coarse aggregates from mortar during transportation, is known
- bleeding
- creeping
- segregation
- shrinkage
Q19 | A flaky aggregate is said to be elongated if its length is
- equal to the mean size
- twice the mean size
- thrice the mean size
- four times the mean size
Q20 | You are asked to construct a massive dam, the type of cement you will use, is
- ordinary portland cement
- rapid hardening cement
- low heat cement
- blast furnace slag cement
Q21 | An ideal ware house, is provided
- water proof masonry walls
- water proof roof
- few windows which remain generally closed
- all the above
Q22 | Normally pre-stressing wires are arranged in the
- upper part of the beam
- lower part of the beam
- center
- anywhere
Q23 | Pick up the correct statement from the following:
- bulking of sand is caused due to formation of a thin film of surface moisture
- fine sand bulks more than coarse sand
- the volume of fully saturated sand, is equal to the volume of dry and loose sand
- all the above
Q24 | The minimum percentage of chemical ingredient of cement is that of
- magnesium oxide
- iron oxide
- alumina
- lime
Q25 | Poisson's ratio for concrete
- remains constant
- increases with richer mixes
- decreases with richer mixes
- none of the above