Pick up the correct statement from the following: There should not be any loss o

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Question
Pick up the correct statement from the following:
Options
A. There should not be any loss of cement from the charged drum of the mixer
B. Cement should be mixed for at least one minute
C. 10% of water is placed in the rotating drum before adding dry material
D. 10% of water is added after placing the other ingredients in the drum
E. All the above.

Correct Answer

All the above.

Concrete Technology problems

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1. If 50 kg of fine aggregates and 100 kg of coarse agregates are mixed in a concrete whose water cement ratio is 0.6, the weight of water required for harsh mix, is
Options
A. 8 kg
B. 10 kg
C. 12 kg
D. 14 kg
E. 15 kg.

2. Pick up the incorrect statement from the following:
Options
A. Space between the exterior walls of a warechouse and bag piles should be 30 cm
B. Cement bags should preferably be piled on wooden planks
C. Cement bags should be placed such that bags of one layer does not touch the bags of the adjacent layer
D. Width and height of the pile should not exceed 3 m and 2.70 m respectively
E. None of these.

3. For a good concrete
Options
A. aggregates should be hard and durable
B. cement should be sufficient to produce the required strength
C. water should be free from organic materials
D. mixing of ingredients should be done thoroughly so as to produce homogeneity
E. All the above.

5. If the effective plan area of a warehouse is 54 sq. m, and maximum height of piles permitted is 270 cm, the number of cement bags to be stored, is
Options
A. 2000 bags
B. 2200 bags
C. 2400 bags
D. 2700 bags
E. 3000 bags

6. The strength and quality of concrete, depend upon:
Options
A. grading of aggregates
B. surface area of aggregates
C. shape of aggregates
D. surface texture of aggregates
E. all the above.

8. Pick up the correct statement from the following:
Options
A. Construction joints in columns are provided a few cm below the junction of beam
B. Construction joints in columns are provided at the bottom haunching
C. Construction joints in beams and slabs are provided within middel third
D. Constructionjoints are generally provided in positions subjected to least shear force
E. All the above.

10. An excess of flaky particles in concrete aggregates
Options
A. decreases the workability
B. increases the quantity of water and sand
C. affects the durability of concrete
D. more than 15% are not desirable
E. all the above.

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