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4

Vicat apparatus is used for

A. Fineness test

B. Consistency test

C. Test for setting time

D. Test for tensile strength

Correct Answer :

B. Consistency test


Related Questions

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4

The lower water cement ratio in concrete, introduces

A. Smaller creep and shrinkage

B. Greater density and smaller permeability

C. Improved frost resistance

D. All the above

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4

Which of the following losses of pre-stress occurs only in pretensioning and not in post-tensioning?

A. Elastic shortening of concrete

B. Shrinkage of concrete

C. Creep of concrete

D. Loss due to friction

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4

The permissible diagonal tensile stress in reinforced brick work is

A. About 0.1 N/mm²

B. Zero

C. 0.3 N/mm² to 0.7 N/mm²

D. About 1.0 N/mm²

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4

Concrete containing

A. Siliceous aggregates, has higher co-efficient of expansion

B. Igneous aggregates, has intermediate coefficient of expansion

C. Lime stones, has lowest co-efficient of expansion

D. All the above

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4

The bulk density of aggregates, is generally expressed as

A. Tonnes/cubic metre

B. kg/cubic metre

C. kg/litre

D. g/cm3

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4

Pick up the correct statement from the following:

A. Construction joints are necessarily planned for their locations

B. Expansion joints are provided to accommodate thermal expansion

C. Construction joints are provided to control shrinkage cracks

D. All the above

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4

The following proportion of the ingredients of concrete mix, is not in conformation to arbitrary method of proportioning

A. 1 : 1 : 2

B. 1 : 2 : 4

C. 1 : 3 : 6

D. 1 : 4 : 10

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4

The diameter of the Vicat plunger is 10 mm and its length varies from

A. 20 mm to 30 mm

B. 30 mm to 40 mm

C. 40 mm to 50 mm

D. 50 mm to 60 mm

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4

If the storey height is equal to length of RCC wall, the percentage increase in strength is

A. 0

B. 10

C. 20

D. 30

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4

According to I.S. : 456, the number of grades of concrete mixes, is

A. 3

B. 4

C. 5

D. 7

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4

A concrete using an air entrained cement

A. Has strength less than 10% to 15%

B. Has more resistance to weathering

C. Is more plastic and workable

D. Is free from segregation and bleeding

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4

Separation of coarse aggregates from mortar during transportation, is known

A. Bleeding

B. Creeping

C. Segregation

D. Shrinkage

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4

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. Lower initial and final setting times

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4

Proper batching ensures

A. Economy

B. Durability

C. Workability

D. All the above

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4

The critical section for finding maximum bending moment for footing under masonry wall is located

A. At the middle of the wall

B. At the edge of the wall

C. Halfway between the middle and edge of the wall

D. At a distance equal to effective depth of footing from the edge of the wall

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4

As compared to ordinary Portland cement, use of pozzolana cement

A. Reduces workability

B. Increases bleeding

C. Increases shrinkage

D. Increases strength

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4

For ensuring quality of concrete, use

A. Single sized aggregates

B. Two sized aggregate

C. Graded aggregates

D. Coarse aggregates

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4

The compressive strength of 100 mm cube as compared to 150 mm cube is always

A. Less

B. More

C. Equal

D. None of the above

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4

The limits of percentage p of the longitudinal reinforcement in a column is given by

A. 0.15% to 2%

B. 0.8% to 4%

C. 0.8% to 6%

D. 0.8% to 8%

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4

The process of mixing, transporting, placing and compacting concrete using Ordinary Port land Cement should not take more than

A. 30 minutes

B. 40 minutes

C. 60 minutes

D. 90 minutes

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4

The surface where two successive placements of concrete meet, is known as

A. Contraction joint

B. Expansion joint

C. Construction joint

D. Both (a) and (b)

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4

The maximum thickness of concrete floor of a cement warehouse, is

A. 10 cm

B. 15 cm

C. 20 cm

D. 25 cm

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4

Hardening of cement occurs at

A. Rapid rate during the first few days and afterwards it continues to increase at a decreased rate

B. Slow rate during the first few days and afterwards it continues to increase at a rapid rate

C. Uniform rate throughout its age

D. None of these

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4

According to Water-Cement Ratio Law, the strength of workable plastic concrete

A. Depends upon the amount of water used in the mix

B. Does not depend upon the quality of cement mixed with aggregates

C. Does not depend upon the quantity of cement mixed with aggregates

D. All the above

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4

Due to circumferential action of the spiral in a spirally reinforced column

A. Capacity of column is decreased

B. Ductility of column reduces

C. Capacity of column is decreased but ductility of column increases

D. Both the capacity of column and ductility of column increase

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4

Water cement ratio is

A. Volume of water to that of cement

B. Weight of water to that of cement

C. Weight of concrete to that of water

D. Both (a) and (b) of the above

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4

Addition of pozzolana to ordinary port land cement, causes

A. Decrease in early strength

B. Reduction in chemical action with sulphates

C. Increase in shrinkage

D. All the above

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4

Pick up the correct statement from the following:

A. Calcium chloride acts as a retarder

B. Calcium chloride acts as an accelerator

C. Gypsum (calcium sulphate) acts as a retarder

D. Both (b) and (c)

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4

If a grading curve is horizontal between the portions of 20 mm I.S. Sieve and 4.75 mm I.S. Sieve, the graded aggregates do not contain

A. 20 mm particles

B. 10 mm particles

C. 4.75 mm particles

D. All the above

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4

If aggregates completely pass through a sieve of size 75 mm and are retained on a sieve of size 60 mm, the particular aggregate will be flaky if its minimum dimension is less than

A. 20.5 mm

B. 30.5 mm

C. 40.5 mm

D. 50.5 mm