(1) Calcium silicate and calcium alurninate Explanation: Portland cement is the most common type of cement in general use around the world because it is a basic ingredient of concrete, mortar, stucco and most non-specialty grout. It usually originates from limestone. It is a fine powder produced by grinding Portland cement. clinker (more than 90%), a limited amount of calcium sulfate (which controls the set time) and up to 5% minor constituents.

(1) Calcium silicate and calcium alurninate Explanation: Portland cement is the most common type of cement in general use around the world because it is a basic ingredient of concrete, mortar, stucco and most non-specialty grout. It usually originates from limestone. It is a fine powder produced by grinding Portland cement. clinker (more than 90%), a limited amount of calcium sulfate (which controls the set time) and up to 5% minor constituents.
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Milk is a colloidal system in which: (1) Water is dispersed in fat (2) Fat is dispersed in water (3) Fat and water are dispersed in each other (4) Fat is dissolved
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(3) preventing rapid setting of cement Explanation: Portland cement clinker is a hydraulic material which shall consist of at least two-thirds by mass of calcium silicates, the remainder consisting of aluminium- and ironcontaining clinker phases and other compounds. The ratio of CaO to SiO2 shall not be less than 2.0. The magnesium oxide content (MgO) shall not exceed 5.0% by mass. Cement sets when mixed with water by way of a complex series of chemical reactions still only partly understood.

Description : (3) preventing rapid setting of cement Explanation: Portland cement clinker is a hydraulic material which shall consist of at least two-thirds by mass of calcium silicates, the remainder consisting of ... mixed with water by way of a complex series of chemical reactions still only partly understood.

Last Answer : Milk is a colloidal system in which: (1) Water is dispersed in fat (2) Fat is dispersed in water (3) Fat and water are dispersed in each other (4) Fat is dissolved

Main constituents of Portland cement are calcium aluminate and (A) Gypsum(B) Silicates(C) Sodium silicate(D) Carbonates

Description : Main constituents of Portland cement are calcium aluminate and (A) Gypsum (B) Silicates (C) Sodium silicate (D) Carbonates

Last Answer : (B) Silicates

The sum of the percentage of tricalcium silicate and dicalcium silicate for Portland cement varies from. (a) 50 to 60% (b) 60 to 70% (c) 70 to 80% (d) 80 to 90%

Description : The sum of the percentage of tricalcium silicate and dicalcium silicate for Portland cement varies from. (a) 50 to 60% (b) 60 to 70% (c) 70 to 80% (d) 80 to 90%

Last Answer : (c) 70 to 80%

A FDA – approved ingredient for protection against painful sensitivity of the teeth due to cold, heat, acids, sweets or contact is (a) Dicalcium phosphate (b) Sodium lauryl sulfate (c) 5% potassium nitrate (d) Zinc chloride (e) Calcium carbonate

Description : A FDA – approved ingredient for protection against painful sensitivity of the teeth due to cold, heat, acids, sweets or contact is (a) Dicalcium phosphate (b) Sodium lauryl sulfate (c) 5% potassium nitrate (d) Zinc chloride (e) Calcium carbonate

Last Answer : Ans: C

Early attainment of strength in rapid hardening cement is mainly due to (A) Gypsum (B) Finer grinding (C) Tri-calcium silicate (D) Tri-calcium aluminate

Description : Early attainment of strength in rapid hardening cement is mainly due to (A) Gypsum (B) Finer grinding (C) Tri-calcium silicate (D) Tri-calcium aluminate

Last Answer : Answer: Option B

__________ is the major constituent of the Portland cement. (A) Calcium carbonate (B) Calcium oxide (C) Tricalcium silicate (D) Calcium sulphate

Description : __________ is the major constituent of the Portland cement. (A) Calcium carbonate (B) Calcium oxide (C) Tricalcium silicate (D) Calcium sulphate

Last Answer : (C) Tricalcium silicate

The compound of Portland cement which reacts immediately with water and also sets first is (A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra calcium alumino ferrite

Description : The compound of Portland cement which reacts immediately with water and also sets first is (A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra calcium alumino ferrite

Last Answer : Answer: Option C

The compound of Portland cement which contributes to the strength after two to three years is (A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra-calcium alumino ferrite

Description : The compound of Portland cement which contributes to the strength after two to three years is (A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra-calcium alumino ferrite

Last Answer : Answer: Option B

Cement is usually a mixture of : (1) Calcium silicate and calcium aluminate (2) Calcium silicate and calcium ferrate (3) Calcium aluminate and calcium ferrate (4) Lime stone and silicon dioxide

Description : Cement is usually a mixture of : (1) Calcium silicate and calcium aluminate (2) Calcium silicate and calcium ferrate (3) Calcium aluminate and calcium ferrate (4) Lime stone and silicon dioxide 

Last Answer : Calcium silicate and calcium aluminate

Cement clinker is reduced to fine size by a (A) Roll crusher (B) Ball mill (C) Tube mill (D) Hammer mill

Description : Cement clinker is reduced to fine size by a (A) Roll crusher (B) Ball mill (C) Tube mill (D) Hammer mill

Last Answer : (C) Tube mill

Pick out the wrong statement. (A) High early strength cement are made from materials having high silica to lime ratio (B) The function of gypsum in cement is to enhance its initial setting rate (C) Acid resistant cements are known as silicate cement (D) Major component of greyish Portland cement is tricalcium silicate

Description : Pick out the wrong statement. (A) High early strength cement are made from materials having high silica to lime ratio (B) The function of gypsum in cement is to enhance its initial ... cements are known as silicate cement (D) Major component of greyish Portland cement is tricalcium silicate

Last Answer : (A) High early strength cement are made from materials having high silica to lime ratio

Which of the following cements contains maximum percentage of dicalcium silicate? (A) Ordinary Portland cement (B) Low heat cement (C) Rapid hardening cement (D) Sulphate resisting cement

Description : Which of the following cements contains maximum percentage of dicalcium silicate? (A) Ordinary Portland cement (B) Low heat cement (C) Rapid hardening cement (D) Sulphate resisting cement

Last Answer : Answer: Option B

The material used as an ingredient of concrete is usually (a) Cement (b) Aggregate (c) Water (d) All the above

Description : The material used as an ingredient of concrete is usually (a) Cement (b) Aggregate (c) Water (d) All the above

Last Answer : (d) All the above

In Portland Blast furnace slag cement, the blast furnace slag content shall not exceed [ A ] 50% [ B ] 65% [ C ] 80% [ D ] 90%

Description : In Portland Blast furnace slag cement, the blast furnace slag content shall not exceed [ A ] 50% [ B ] 65% [ C ] 80% [ D ] 90%

Last Answer : [ B ] 65%

A thick paste of cement, sand and water is called – (1) Concrete (2) R.C.C. (3) Mortar (4) Kiln

Description : A thick paste of cement, sand and water is called – (1) Concrete (2) R.C.C. (3) Mortar (4) Kiln

Last Answer : (3) Mortar Explanation: Mortar is a workable paste used to bind construction blocks together and fill the gaps between them. Modern mortars are typically made from a mixture of sand, a binder such as cement or lime, and water

A thick paste of cement, sand and water is called (1) Concrete (2) R.C.C. (3) Mortar (4) Kiln

Description : A thick paste of cement, sand and water is called (1) Concrete (2) R.C.C. (3) Mortar (4) Kiln

Last Answer : Mortar

Repairing by cement pressure grouting can be adopted in case of a) Honey comb concrete b) Hollow masonry, Dormant cracks c) Deep leached mortar joints d) all the above*

Description : Repairing by cement pressure grouting can be adopted in case of a) Honey comb concrete b) Hollow masonry, Dormant cracks c) Deep leached mortar joints d) all the above*

Last Answer : d) all the above*

Mortar is a mixture of water sand and (1) Slaked lime (2) Quick lime (3) Limestone (4) Gypsum

Description : Mortar is a mixture of water sand and (1) Slaked lime (2) Quick lime (3) Limestone (4) Gypsum

Last Answer : (1) Slaked lime Explanation: Mortar is a workable paste used to bind construction blocks together and fill the gaps between them. The blocks may be stone, brick, cinder blocks, etc. Mortar becomes hard ... Mortar can also be used to fix, or point, masonry when the original mortar has washed away.

Mortar is a mixture of water, sand and (1) Slaked lime (2) Quick lime (3) Limestone (4) Gypsum

Description : Mortar is a mixture of water, sand and (1) Slaked lime (2) Quick lime (3) Limestone (4) Gypsum

Last Answer : Slaked lime

For mass concrete work, the type of cement preferable is [ A ] Ordinary Portland cement [ B ] Rapid hardening cement [ C ] Low heat cement [ D ] Blast furnace slag cement

Description : For mass concrete work, the type of cement preferable is [ A ] Ordinary Portland cement [ B ] Rapid hardening cement [ C ] Low heat cement [ D ] Blast furnace slag cement

Last Answer : [ C ] Low heat cement

Pick up the compound responsible for early strength of cement from the following: (A) Tetra-calcium alumino-ferrite (B) Tri-calcium silicate (C) Tri-calcium aluminate (D) Di-calcium silicate

Description : Pick up the compound responsible for early strength of cement from the following: (A) Tetra-calcium alumino-ferrite (B) Tri-calcium silicate (C) Tri-calcium aluminate (D) Di-calcium silicate

Last Answer : Answer: Option B

To retard the initial setting time of cement, the compound responsible, is (A) Tri-calcium silicate (B) Gypsum (C) Di-calcium silicate (D) Tri-calcium aluminate

Description : To retard the initial setting time of cement, the compound responsible, is (A) Tri-calcium silicate (B) Gypsum (C) Di-calcium silicate (D) Tri-calcium aluminate

Last Answer : Answer: Option B

What is Cement Clinker ?

Description : What is Cement Clinker ?

Last Answer : At high temperatures, calcium aluminate , calcium silicate and calcium aluminopherite melt to form small gray hard stones of different sizes , called cement clinker.

Finely ground calcium aluminate & silicate is a/an (A) Cermet (B) Cement (C) Abrasive (D) Explosive

Description : Finely ground calcium aluminate & silicate is a/an (A) Cermet (B) Cement (C) Abrasive (D) Explosive

Last Answer : (B) Cement

Di-calcium silicate (C2S) (A) Hydrates rapidly (B) Generates less heat of hydration (C) Hardens rapidly (D) Provides less ultimate strength to cement

Description : Di-calcium silicate (C2S) (A) Hydrates rapidly (B) Generates less heat of hydration (C) Hardens rapidly (D) Provides less ultimate strength to cement

Last Answer : Answer: Option B

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

Description : 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

Last Answer : Answer: Option C

Good quality cement contains higher percentage of (A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra calcium alumino ferrite

Description : Good quality cement contains higher percentage of (A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra calcium alumino ferrite

Last Answer : Answer: Option A

Ultimate strength to cement is provided by (A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra calcium alumino ferrite

Description : Ultimate strength to cement is provided by (A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra calcium alumino ferrite

Last Answer : Answer: Option B

Rapid hardening cement contains (A) Tri-calcium silicate (B) Tri-calcium aluminate (C) Tetra-calcium alumino-ferrite (D) Di-calcium silicate

Description : Rapid hardening cement contains (A) Tri-calcium silicate (B) Tri-calcium aluminate (C) Tetra-calcium alumino-ferrite (D) Di-calcium silicate

Last Answer : Answer: Option A

In the cement the compound quickest to react with water, is (A) Tri-calcium aluminate (B) Tetra-calcium alumino-ferrite (C) Tri-calcium silicate (D) Di-calcium silicate

Description : In the cement the compound quickest to react with water, is (A) Tri-calcium aluminate (B) Tetra-calcium alumino-ferrite (C) Tri-calcium silicate (D) Di-calcium silicate

Last Answer : Answer: Option A

The main constituent of cement which is responsible for initial setting of cement is (A) Di-calcium silicate (B) Tri-calcium silicate (C) Tri-calcium aluminate (D) All of the above

Description : The main constituent of cement which is responsible for initial setting of cement is (A) Di-calcium silicate (B) Tri-calcium silicate (C) Tri-calcium aluminate (D) All of the above

Last Answer : Answer: Option C

The constituent of cement which is responsible for all the undesirable properties of cement is (A) Di-calcium silicate (B) Tri-calcium silicate (C) Tri-calcium aluminate (D) Tetra calcium alumino ferrite

Description : The constituent of cement which is responsible for all the undesirable properties of cement is (A) Di-calcium silicate (B) Tri-calcium silicate (C) Tri-calcium aluminate (D) Tetra calcium alumino ferrite

Last Answer : Answer: Option C

The first compound which reacts with water when mixed with cement is (a) Tricalcium Aluminate (b) Tricalcium silicate (c) Di-calcium silicate (d) Teracalcium aluminate

Description : The first compound which reacts with water when mixed with cement is (a) Tricalcium Aluminate (b) Tricalcium silicate (c) Di-calcium silicate (d) Teracalcium aluminate

Last Answer : (a) Tricalcium Aluminate

About 70% to 80% of cement is contributed by [ A ] Tricalcium silicate and Tricalcium aluminate [ B ] Tricalcium silicate and Dicalcium silicate [ C ] Tricalcium Aluminate and Dicalcium silicate [ D ] Tricalcium Aluminate and Tetra calcium Aluminoferrite

Description : About 70% to 80% of cement is contributed by [ A ] Tricalcium silicate and Tricalcium aluminate [ B ] Tricalcium silicate and Dicalcium silicate [ C ] Tricalcium Aluminate and Dicalcium silicate [ D ] Tricalcium Aluminate and Tetra calcium Aluminoferrite

Last Answer : [ B ] Tricalcium silicate and Dicalcium silicate

For constructing a terrazzo floor, Pick up the incorrect statement from the following: (A) A base course is prepared as in cement concrete flooring (B) A 32 mm thick layer of cement concrete (1 : 2 : 4) is laid on the base course and the surface is made smooth by trowelling (C) Glass strips are driven into the layer according to the pattern required (D) After final grinding is over, oxalic acid mixed with water is spread over and rubbed hard with soft material

Description : For constructing a terrazzo floor, Pick up the incorrect statement from the following: (A) A base course is prepared as in cement concrete flooring (B) A 32 mm thick layer of cement concrete ... final grinding is over, oxalic acid mixed with water is spread over and rubbed hard with soft material

Last Answer : Answer: Option B

Based on what he has heard regarding the profitability of such items, Fred Goldstein is considering adding a fresh shellfish case in his grocery store. Fred knows very little about this product or the concerns of shoppers who buy shellfish. He is looking for help in display set -up and merchandising ideas. He should contact which one of the following types of wholesalers? A)Limited -line B)Specialty -line C)General merchandise D)Rack jobber E)Limited -service merchant

Description : Based on what he has heard regarding the profitability of such items, Fred Goldstein is considering adding a fresh shellfish case in his grocery store. Fred knows very little about this product or ... )Limited -line B)Specialty -line C)General merchandise D)Rack jobber E)Limited -service merchant

Last Answer : B)Specialty -line C)General merchandise

Which of the following cements is suitable for use in massive concrete structures such as large dams? (A) Ordinary Portland cement (B) Low heat cement (C) Rapid hardening cement (D) Sulphate resisting cement

Description : Which of the following cements is suitable for use in massive concrete structures such as large dams? (A) Ordinary Portland cement (B) Low heat cement (C) Rapid hardening cement (D) Sulphate resisting cement

Last Answer : Answer: Option B

In ideal pavement is constructed with (A) Bricks (B) Hard soil (C) Portland cement concrete (D) Tar

Description : In ideal pavement is constructed with (A) Bricks (B) Hard soil (C) Portland cement concrete (D) Tar

Last Answer : Answer: Option C

For Ordinary Portland cement concrete exposed to dry and hot weather conditions, good moist curing period is [ A ] 7 days [ B ] 10 days [ C ] 14 days [ D ] None of the above

Description : For Ordinary Portland cement concrete exposed to dry and hot weather conditions, good moist curing period is [ A ] 7 days [ B ] 10 days [ C ] 14 days [ D ] None of the above

Last Answer : [ B ] 10 days

Carbonisation of coal consists of  A. drying and crushing the coal to a fine powder  B. moulding the finely ground coal under pressure with or without a binding material  C. heating the wood with a limited supply of air to temperature not less than 280°C  D. none of the above

Description : Carbonisation of coal consists of  A. drying and crushing the coal to a fine powder  B. moulding the finely ground coal under pressure with or without a binding material  C. heating the wood with a limited supply of air to temperature not less than 280°C  D. none of the above

Last Answer : Answer: D

The plates of a NiCad storage battery are made of ________. A. potassium hydroxide with a small amount of sulfuric acid B. lead and lead peroxide C. silver oxide and lead sulfate D. combinations of nickel powder and nickel & cadmium salts

Description : The plates of a NiCad storage battery are made of ________. A. potassium hydroxide with a small amount of sulfuric acid B. lead and lead peroxide C. silver oxide and lead sulfate D. combinations of nickel powder and nickel & cadmium salts

Last Answer : Answer: D

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

Description : 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

Last Answer : Answer: Option C

What will be the volume of CO2 at NTP obtained on heating 10 grams of (90% pure) limestone [Pb. CET 2001] (A) 22.4 litre (B) 2.016 litre (C) 2.24 litre (D) 20.16 litre

Description : What will be the volume of CO2 at NTP obtained on heating 10 grams of (90% pure) limestone [Pb. CET 2001] (A) 22.4 litre (B) 2.016 litre (C) 2.24 litre (D) 20.16 litre

Last Answer : (B) 2.016 litre

(1) aluminium powder and ammonium nitrate Explanation: Ammonal is an explosive made up of ammonium nitrate and aluminium powder. The ammonium nitrate functions as an oxidizer and the aluminium as fuel. The use of the relatively cheap ammonium nitrate and aluminium makes it a replacement for pure TNT. The mixture is affected by humidity because ammonium nitrate is highly hygroscopic. Ammonal is not easily detonated, requiring a fairly substantial shock, though it is still more sensitive than trinitrotoluene and composition C4.

Description : (1) aluminium powder and ammonium nitrate Explanation: Ammonal is an explosive made up of ammonium nitrate and aluminium powder. The ammonium nitrate functions as an oxidizer and the aluminium ... a fairly substantial shock, though it is still more sensitive than trinitrotoluene and composition C4.

Last Answer : Gelatin is mostly used in making icecreams in order to - (1) prevent making a colloid (2) stabilise the colloid and prevent crystallisation (3) stabilise mixture (4) enrich the aroma

Low heat cement contains more amount of __________ than that of ordinary Portland cement [ A ] C3S [ B ] C2S [ C ] C3A [ D ] None of the above

Description : Low heat cement contains more amount of __________ than that of ordinary Portland cement [ A ] C3S [ B ] C2S [ C ] C3A [ D ] None of the above

Last Answer : [ B ] C2S

Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of Portland cement. The component of Portland cement which first hardens is (A) 5CaO. 3 Al2O3 (B) 3CaO. Al2O3 (C) 3CaO. SiO2 (D) 2CaO. SiO2

Description : Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of Portland cement. The component of Portland cement which first hardens is (A) 5CaO. 3 Al2O3 (B) 3CaO. Al2O3 (C) 3CaO. SiO2 (D) 2CaO. SiO2

Last Answer : Option A

For a cement plant the parameter, ―kWh/MT of clinker ―indicates a) Energy Index parameter b) Utility factor

Description : For a cement plant the parameter, ―kWh/MT of clinker ―indicates a) Energy Index parameter b) Utility factor

Last Answer :  Energy Index parameter 

19. For a cement plant the parameter, ―kWh/MT of clinker ―indicates a) Energy Index parameter b) Utility factor c) Production factor d) Load factor

Description : For a cement plant the parameter, ―kWh/MT of clinker ―indicates a) Energy Index parameter b) Utility factor c) Production factor d) Load factor

Last Answer : Utility factor

For a cement plant the parameter, ―kWh/MT of clinker ―indicates c) Energy Index parameter c) Production factor d) Utility factor d) load factor

Description : For a cement plant the parameter, ―kWh/MT of clinker ―indicates c) Energy Index parameter c) Production factor d) Utility factor d) load factor

Last Answer :  Energy Index parameter

For a cement plant the parameter, ―kWh/MT of clinker ―indicates a) Energy Index parameter c) Production factor b) Utility factor d) load factor

Description : For a cement plant the parameter, ―kWh/MT of clinker ―indicates a) Energy Index parameter c) Production factor b) Utility factor d) load factor

Last Answer : Energy Index parameter