In 1:2:4 cement concrete, 1 stands for

The top diameter, bottom diameter and height of a slump mould are

Inert material of cement concrete mix is

The cement used to lay concrete under static water or running water is

The process of mixing, transporting, placing and compacting the cement concrete should not take more than

The ratio of different ingredient (cement,sand and aggregate) for M20 gradeconcrete is

The nominal mix of cement concrete,corresponding approximately to the grade m20 is

Which of the following cement suitable for us in massive concrete structures such as dam

The steel used in reinforced cement concrete work is

The chemical reaction between cement and water is termed as

The strength of cement concrete depends upon

A covering concrete placed on the exposed top of an exterior wall is known as

A covering of concrete placed on top of an exposed external wall is called

Which one of the following set of values give the minimum clear cover (in mm) for the main reinforcement in the slab, beam, column and footing respectively according to IS 456—1978.

The top diameter, bottom diameter and the height of a slump mould are :

Which one of the following is employed to determine the strength of hardened concrete of an existing concrete structure

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

All the type bars are to be struck at

For a bar of diameter d, the anchorage value of hook is:

Bond between steel and concrete ensures

Steel Reinforcement is placed in cement concrete at suitable places to keep up the:

Workability of concrete effected mainly by:

The value of Vee-Bee time for low workability as per Indian Standards is prescribed as:

The minimum cover in a slab should neither be less than the diameter of bar nor less than:

Compared to mild steel the Steel used for prestressing of concrete beam has:(

The most common admixture which is used to accelerate the initial set of concrete is:

The stress strain curve of concrete as per IS: 456 is

Steel is preferred as reinforcing material in concrete because :

The main reason for providing certain minimum number of reinforcing bars at support in a SSB is to resist............................. in that zone

Flexural strength of M 25 grade concrete is:

In case of hand mixing of concrete, the extra cement to be added is:

Mix ratio of M20 grade cement concrete

Forms of freshly laid rcc work should not be struck for a period called .............................. until the concrete has reached a strength at least twice the stress to which the concrete may be subjected to at the time of removal of form work.

The maximum strain in concrete at the outer most fibre is :

Workability of concrete mix having very low water cement ratio should be obtained by:

The lining is carried out by forcing slurry of cement mortar under pressure through a nozzle on the canal surface is termed as:

The volume of coarse aggregate required to make 100 m of 1:2:4 concrete is:

Which of the following types of concrete beam Section, failure will occur all on a sudden?

Which one of the following act as an admixture in ordinary concrete?

In a reinforced concrete retaining wall shear key is provided if:

Live load or imposed load is to be taken as per

Curtailment of steel bars, in a beam, is possible, since

Quantity of water required per 50 kg of cement, for M20 concrete mix

When carbon contents less than 0.1%, steel is called:

The usual concrete mix for RCC lintel is ................................ (cement: sand:aggregate)

The diameter of longitudinal bars of a RCC column should never be less than:

If a slab is supported on two opposite ends only then the slab is known as.........................

In a singly reinforced beam, if the permissible stress in concrete reaches earlier than the permissible stress in steel the beam section is called?

To prevent segregation, the concrete should not be thrown from a height of more than:

The separation of coarse aggregate from concrete during its transportation is known as: