WorksheetsICI- ONLINE QUIZ
Total questions: 17
Worksheet time: 9mins
Tricalcium aluminate (C3A) in cement
Reacts fast with water
Generates less heat of hydration
Causes initial setting and early strength of cement
Does not contribute to develop ultimate strength
Workability of concrete is measured by
Vicat apparatus test
Slump test
Minimum void method
Talbot Richard test
Le-Chatelier's apparatus is used for testing
Soundness of cement
Hardness of cement
Strength of cement
Durability of cement
Workability of concrete mix with low water cement ratio is determined by
L- box test test
Slump test
Compaction factor test
U-box test
Workability of concrete for a given water content is good if the aggregates,
Rounded aggregate
Irregular aggregate
Angular aggregate
Flaky aggregates
If the various concrete ingredients i.e. cement, sand and aggregates are in the ratio of 1:3:6, the grade of concrete, is
M 10
M 15
M 20
M 25
Vicat apparatus is used to test ........................ of cement
Fineness
Consistency
Initial setting time
Final setting time
Vicat apparatus is used to test ........................ of cement
Fineness
Consistency
Initial setting time
Final setting time
Setting time of cement is increased by adding
Gypsum
Hydrogen peroxide
Calcium chloride
Sodium oxide
Setting time of cement is increased by adding
Gypsum
Hydrogen peroxide
Calcium chloride
Sodium oxide
Addition of pozzolana to ordinary port land cement, causes
Decrease in early strength
Reduction in chemical action with chlorides
Decrease in shrinkage
All the above
The process of mixing, transporting, placing and compacting concrete using Ordinary Port land Cement should not take more than
30 minutes
60 minutes
40 minutes
90 minutes
The strength of concrete after one year as compared to 28 days strength is about
10 to 15% more
15 to 20% more
20 to 25% more
25 to 50% more
The property of fresh concrete, in which the water in the mix tends to rise to the surface while placing and compacting, is called
Segregation
Bleeding
Bulking
Creep
The following proportion of the ingredients of concrete mix, is not in conformation to arbitrary method of proportioning as per IS 456
1 : 1 : 2
1 : 2 : 4
1 : 3 : 6
1 : 4 : 10
Placing of concrete should preferably be done at a temperature of
0°C
10± 2°C
20± 2°C
27 ± 2°C
The risk of segregation in concrete is more for
Wetter mix
Larger proportion of maximum size aggregate
Coarser grading of aggregate
None of the above
