Home
Current Affairs January 2024

What is the correct answer?

4

For preparing ordinary concrete, the quantity of water used, is

A. 5% by weight of aggregates plus 20% of weight of cement

B. 10% by weight of aggregates plus 10% of weight of cement

C. 5% by weight of aggregates plus 30% of weight of cement

D. 30% by weight of aggregates plus 10% of weight of cement

Correct Answer :

C. 5% by weight of aggregates plus 30% of weight of cement


Related Questions

What is the correct answer?

4

Workability improved by adding

A. Air-entraining agent

B. Foaming agent

C. Oily-agent

D. All the above

What is the correct answer?

4

Critical section for shear in case of flat slabs is at a distance of

A. Effective depth of slab from periphery of column/drop panel

B. d/2 from periphery of column/capital/ drop panel

C. At the drop panel of slab

D. At the periphery of column

What is the correct answer?

4

Pick up the correct statement from the following:

A. The weight of ingredients of concrete mix, is taken in kilograms

B. Water and aggregates are measured in litres

C. 20 bags of cement make one tonne

D. All the above

What is the correct answer?

4

The entrained air in concrete

A. Increases workability

B. Decreases workability

C. Decreases resistance to weathering

D. Increases strength

What is the correct answer?

4

The preliminary test is repeated if the difference of compressive strength of three test specimens, exceeds

A. 5 kg/cm2

B. 8 kg/cm2

C. 10 kg/cm2

D. 15 kg/cm2

What is the correct answer?

4

The maximum value of hoop compression in a dome is given by

A. wR / 4d

B. wR/2d

C. wR/d

D. 2wR/d Where, w = load per unit area of surface of dome R = radius of curvature d = thickness of dome

What is the correct answer?

4

Pick up the correct statement from the following:

A. Lime in excess, causes the cement to expand and disintegrate

B. Silica in excess, causes the cement to set slowly

C. Alumina in excess, reduces the strength of the cement

D. All the above

What is the correct answer?

4

Construction joints are provided

A. Where B.M. and S.F. are small

B. Where the member is supported by other member

C. At 18 m apart in huge structures

D. All the above

What is the correct answer?

4

Bulking of sand is maximum if moisture content is about

A. 2 %

B. 4 %

C. 6 %

D. 10 %

What is the correct answer?

4

On a grading curve, the gap grading is represented by

A. A horizontal line

B. A vertical line

C. N.W. inclined line

D. N.E. inclined line

What is the correct answer?

4

The void ratio of

A. Single size coarse aggregate is roughly 0.45

B. Graded coarse aggregate is roughly 0.040

C. Fine aggregate is roughly 0.45

D. All the above

What is the correct answer?

4

In a counterfort retaining wall, the main reinforcement in the stem at mid span is provided on

A. Front face only

B. Inner face only

C. Both front face and inner face

D. None of the above

What is the correct answer?

4

According to ISI recommendations, the maximum depth of stress block for balanced section of a beam of effective depth d is

A. 0.43 d

B. 0.55 d

C. 0.68 d

D. 0.85 d

What is the correct answer?

4

The centroid of compressive force, from the extreme compression fiber, in limit state design lies at a distance of (Where xu is the depth of neutral axis at the limit state of collapse)

A. 0.367 xu

B. 0.416 xu

C. 0.446 xu

D. 0.573 xu

What is the correct answer?

4

Workability of concrete mix with low water cement ratio is determined by

A. Tensile strength test

B. Slump test

C. Compaction factor test

D. Flexural strength test

What is the correct answer?

4

According to IS: 4561978, the column or the strut is the member whose effective length is greater than

A. The least lateral dimension

B. 2 times the least lateral dimension

C. 3 times the least lateral dimension

D. 4 times the least lateral dimension

What is the correct answer?

4

Admixtures which cause early setting and hardening of concrete are called

A. Workability admixtures

B. Accelerators

C. Retarders

D. Air entraining agents

What is the correct answer?

4

The strength of concrete after one year as compared to 28 days strength is about

A. 10 to 15% more

B. 15 to 20% more

C. 20 to 25% more

D. 25 to 50% more

What is the correct answer?

4

Permissible compressive strength of M 150 concrete grade is

A. 100 kg/cm2

B. 150 kg/cm2

C. 200 kg/cm2

D. 250 kg/cm2

What is the correct answer?

4

The property of the ingredients to separate from each other while placing the concrete is called

A. Segregation

B. Compaction

C. Shrinkage

D. Bulking

What is the correct answer?

4

1% of voids in a concrete mix would reduce its strength by about

A. 5 %

B. 10 %

C. 15 %

D. 20 %

What is the correct answer?

4

The condition not applicable to water cement ratio law, is

A. Internal moisture conditions on hydration continue till complete strength is gained

B. Concrete specimens may be tested at any temperature

C. Concrete specimens need be of same age

D. Concrete specimens need be of same size

What is the correct answer?

4

In T-shaped R C. retaining walls, the main reinforcement in the stem is provided on

A. The front face in one direction

B. The front face in both directions

C. The inner face in one direction

D. The inner face in both directions

What is the correct answer?

4

Separation of coarse aggregates from mortar during transportation, is known

A. Bleeding

B. Creeping

C. Segregation

D. Shrinkage

What is the correct answer?

4

In counterfort type retaining walls (i) The vertical slab is designed as a continuous slab (ii) The heel slab is designed as a continuous slab (iii) The vertical slab is designed as a cantilever (iv) The heel slab is designed as a cantilever The correct answer is

A. (i) and (ii)

B. (i)and(iv)

C. (ii) and (iii)

D. (iii) and (iv)

What is the correct answer?

4

The commercial name of white and coloured cement in India, is

A. Colorcrete

B. Silvicrete

C. Snowcem

D. All the above

What is the correct answer?

4

The factor of safety for

A. Steel and concrete are same

B. Steel is lower than that for concrete

C. Steel is higher than that for concrete

D. None of the above

What is the correct answer?

4

Which of the following statements is incorrect?

A. Minimum cross sectional area of longitudinal reinforcement in a column is 0.8%

B. Spacing of longitudinal bars measured along the periphery of column should not exceed 300 mm

C. Reinforcing bars in a column should not be less than 12 mm in diameter

D. The number of longitudinal bars provided in a circular column should not be less than four

What is the correct answer?

4

Saw dust can be rendered chemically inert by boiling it in water containing

A. Ferrous sulphate

B. Potassium chloride

C. Ammonia

D. Nitric acid

What is the correct answer?

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