Chapter 3: Concrete

he process of selection of relative proportions of cement, sand, course aggregate and water, so as to obtain a concrete of desired quantity is known as the ________

• Proportioning of reinforcement

• Proportioning of concrete

• Proportioning of cement

• Proportioning of water

In _______ method of volumetric proportions, the proportions of cement, sand and coarse aggregate are fixed or beta really such as 1:2:4 or 1:3:6 etc.

• Minimum void method

• Maximum void method

• Water-cement ratio method

• Water-cement ratio method

The strength of well compacted concrete with good workability is depend only on the _________

• Water content

• Cement content

• Water-cement ratio

• Water-soaked ratio

The process of Rolling, folding and spreading of particle is known as the __________ of concrete.

• Curing

• Mixing

• Grouting

• Watering

The concrete having bulk density between 5 kN/m³ to 18 kN/m³ is known as _________

• Coloured concrete

• Lightweight concrete

• No-fines concrete

• Heavyweight concrete

The sound absorption of light weight concrete is _________

• Medium

• Bad

• Good

• Cannot say

The _________ is used to measure the workability of concrete mixture which is commonly used in the field.

• Vee-bee test

• Slump test

• Compaction factor

• Workability test

In ________ test, the workability of concrete is measured in the terms of internal energy required to compact the concrete fully.

• Compaction factor test

• Vee-bee test

• Rotating table test

• Slump cone test

The presence of moisture in the sand _____________ the volume of the sand.

• Increases

• Decreases

• Shrink

• Contract

Concrete can be formulated with high tensile strength, but always has lower compressive strength.

• True

• False