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Current Affairs January 2024

What is the correct answer?

4

Initial setting of cement is caused due to

A. Tri-calcium silicate

B. Di-calcium silicate

C. Tri-calcium aluminate

D. Tetra calcium alumino ferrite

Correct Answer :

C. Tri-calcium aluminate


Related Questions

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4

Cast steel is manufactured by

A. Cementation process

B. Crucible process

C. Bessemer process

D. Open hearth process

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4

Veneering means

A. Carving out designs on timber planks

B. Chemically treating timber planks

C. Thick layer of superior wood glued to inferior wood

D. Thin layer of superior wood glued to inferior wood

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4

Whitworth compressed steel is obtained when molten steel is subjected to a pressure of

A. 5 kg/mm2

B. 9 kg/mm2

C. 13 kg/mm2

D. 15 kg/mm2

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4

Sandstone is a (i) Sedimentary rock (ii) Aqueous rock (iii) Siliceous rock The correct answer is

A. Only (i)

B. Both (i) and (ii)

C. Both (i) and (iii)

D. All (i), (ii) and (iii)

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4

The plastics prepared from Vinyl resin are

A. Odourless

B. Non-toxic

C. Transparent

D. All of these

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4

Lime putty

A. Is made from hydraulic lime

B. Is made by adding lime to water

C. Can be used only upto three days

D. All of above

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4

Excess of silica in brick earth results in

A. Cracking and warping of bricks

B. Loss of cohesion

C. Enhancing the impermeability of bricks

D. None of the above

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4

Jhumb bricks are

A. Under burnt

B. Over burnt

C. Kutcha

D. None of these

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4

The basic purpose of a retarder in concrete is

A. To increase the initial setting time of cement paste in concrete

B. To decrease the initial setting time of cement paste in concrete

C. To render the concrete more water tight

D. To improve the workability of concrete mix

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4

Seasoning of timber is done for

A. Increasing moisture content

B. Decreasing moisture content

C. Increasing strength of timber

D. None to these

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4

Pick up the correct statement from the following:

A. The lime in excess makes the cement unsound and causes the cement to expand and disintegrate

B. The silica in excess makes the cement stronger but its setting time also increases

C. The excess amount of alumina weakens the cement

D. All the above

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4

The proportions of charcoal, saltpetre and sulphur in gun powder by weight, are respectively:

A. 15, 75, 10

B. 75, 10, 15

C. 10, 15, 75

D. 10, 75, 15

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4

Pick up the correct statement from the following:

A. Styrene resin is produced from ethylene which is made from petroleum

B. Styrene resin is light in weight

C. Styrene resin transmits ultraviolet waves of light

D. All the above

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4

Generally wooden moulds are made from

A. Ply wood

B. Shishum wood

C. Deodar wood

D. Teak wood

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4

Pick up the correct characteristic of Pyroxene from the following:

A. It forms octagonal crystals

B. It converts to chlorine by hydration

C. Its density is 2.3 to 3.6 g/cm2

D. All the above

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4

Turpentine oil is used in paints as

A. Thinner

B. Vehicle

C. Base

D. Drier

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4

Sand stone is

A. Sedimentary rock

B. Metamorphic rock

C. Igneous rock

D. Volcanic rock

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4

Quick setting cement is produced by adding

A. Less amount of gypsum in very fine powdered form

B. More amount of gypsum in very fine powdered form

C. Aluminium sulphate in very fine powdered form

D. Pozzolana in very fine powdered form

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4

Which of the following timbers is suitable for making sports goods?

A. Mulberry

B. Mahogany

C. Sal

D. Deodar

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4

Mild steel is used for

A. Structural works in beams, joints and girders

B. Small sized water pipes

C. Columns and struts

D. None of these

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4

Lacquer is

A. Oil paint

B. Distemper

C. Spirit varnish

D. None to these

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4

For a 50 kg cement bag water required, is

A. 16.5 litres

B. 18.5 litres

C. 20.5 litres

D. 22.5 litres

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4

The most fire resistant paints are:

A. Enamel paints

B. Aluminium paints

C. Asbestos paints

D. Cement paints

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4

Asbestos is

A. Corrugated sheet used for roofing

B. An incombustible fire proof material

C. An organic substance

D. All the above

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4

Lacquer paints

A. Are generally applied on structural steel

B. Are less durable as compared to enamel paints

C. Consist of resin and nitro-cellulose

D. All the above

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4

For high grade instruments the steel preferred to, is

A. Cast steel

B. Bessemer steel

C. Mild steel

D. Whitworth compressed steel

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4

Which of the following bricks are used for lining of furnaces?

A. Over-burnt bricks

B. Under-burnt bricks

C. Refractory bricks

D. First class bricks

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4

Pick up the hypabyssal rock from the following:

A. Granite

B. Dolerite

C. Basalt

D. All the above

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4

The main function of alumina in brick earth is

A. To impart plasticity

B. To make the brick durable

C. To prevent shrinkage

D. To make the brick impermeable

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4

Le-Chatelier's device is used for determining the

A. Setting time of cement

B. Soundness of cement

C. Tensile strength of cement

D. Compressive strength of cement