Concrete Technology Questions and Answers – Factors Affecting PIC, Cold Weather Concreting

This set of Concrete Technology Multiple Choice Questions & Answers (MCQs) focuses on “Factors Affecting PIC, Cold Weather Concreting”.

1. The moisture content of the aggregate shall not exceed from ____________
a) .1% – .5%
b) 1% – 55
c) 10% – 50%
d) 15%
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2. Which one is not the polymeric resin?
a) Polyester resin
b) Epoxy resin
c) Vinyl ester resin
d) Sulphates
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3. Higher resin dosage is recommended when using ________
a) Coarse aggregate
b) Fine aggregates
c) All in one aggregates
d) More cement
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4. Steel fibers helps in the enhancement of its properties.
a) True
b) False
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5. The addition of glass fibers are in the range of __________
a) 0-6%
b) 10%
c) 15-20%
d) 20%-25%
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6. Concrete is not recommended to be placed at a temperature below __________^oC.
a) 2
b) 3
c) 4
d) 5
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7. IS: 7861 part-2 deals with __________
a) Hot weathering concrete
b) Cold weathering concrete
c) Air entertained concrete
d) OPC
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8. Why the time period for removal of form work has to be increased.
a) The development of strength of concrete is retarded compared with development at normal temperature
b) The development of strength of concrete is accelerate compared with development at normal temperature
c) The development of strength of concrete is advanced compared with development at normal temperature
d) The development of strength of concrete is precocious compared with development at normal temperature
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9. If concrete is exposed to repeated freezing and thawing after the final set, the final qualities of the concrete may also be __________
a) Impair
b) Aid
c) Improve
d) Extend
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10. Large temperature differentials within the concrete member may promote __________
a) Elastic shrinkage
b) Cracking
c) High workability
d) Good strength
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11. When the concrete in fresh stage is exposed to freeze before certain pre-hardening period, compressive strength may get __________
a) Increased to 50%
b) Decreased to 50%
c) Increased to 25%
d) Decreased to 25%
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