Chemical composition of cement is – (1) Limestone and Clay (2) Limestone, Clay and Gypsum (3) Limestone and Gypsum (4) Clay and Gypsum

Chemical composition of cement is – (1) Limestone and Clay (2) Limestone, Clay and Gypsum (3) Limestone and Gypsum (4) Clay and Gypsum
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(2) Limestone, Clay and Gypsum Explanation: The two important raw materials used for the preparation of cement are : • Limestone : The chemical formula of limestone is CaCO3 and it is used in the manufacture of cement just to provide CaO.
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Chemical composition of cement is (1) Limestone and Clay (2) Limestone, Clay and Gypsum (3) Limestone and Gypsum (4) Clay and Gypsum

Description : Chemical composition of cement is (1) Limestone and Clay (2) Limestone, Clay and Gypsum (3) Limestone and Gypsum (4) Clay and Gypsum

Last Answer :  Limestone, Clay and Gypsum

Which is/ are the important raw materials in cement industry? (1) Limestone (2) Gypsum and Clay (3) Clay (4) Limestone and Clay

Description : Which is/ are the important raw materials in cement industry? (1) Limestone (2) Gypsum and Clay (3) Clay (4) Limestone and Clay

Last Answer : (4) Limestone and Clay Explanation: Limestone Claimed Clay Cement is a low-carbon alternative to the standard Portland cement. LC3 can reduce CO2 emissions related to cement manufacturing of cement by reducing the amount of clinker, replacing it with limestone and claimed clays.

Which one of the following is used in large quantities in Cement Industry? (1) Gypsum (2) Limestone (3) Coal (4) Clay

Description : Which one of the following is used in large quantities in Cement Industry? (1) Gypsum (2) Limestone (3) Coal (4) Clay

Last Answer : (2) Limestone Explanation: Limestone, as used by the minerals industry, is any rock composed mostly of calcium carbonate (CaCO3). Limestone is used to produce Portland cement, as aggregate ... products, making it a truly versatile commodity. Portland cement is essential to the building industry.

Cement is formed by strongly heating a mixture of – (1) limestone and graphite (2) limestone and clay (3) chalk and graphite (4) clay and graphite

Description : Cement is formed by strongly heating a mixture of – (1) limestone and graphite (2) limestone and clay (3) chalk and graphite (4) clay and graphite

Last Answer : (2) limestone and clay Explanation: Cement is made by heating limestone (calcium carbonate) with small quantities of other materials (such as clay) to 1450 degree C in a kiln, in a process known as ... , or quicklime, which is then blended with the other materials that have been included in the mix.

Cement is formed by strongly heating a mixture of (1) limestone and graphite (2) limestone and clay (3) chalk and graphite (4) clay and graphite

Description : Cement is formed by strongly heating a mixture of (1) limestone and graphite (2) limestone and clay (3) chalk and graphite (4) clay and graphite 

Last Answer : limestone and clay

Which of the following mineral is used in cement industry and plaster of paris? A. Marble B. China Clay C. Gypsum D. Fire Clay

Description : Which of the following mineral is used in cement industry and plaster of paris? A. Marble B. China Clay C. Gypsum D. Fire Clay

Last Answer : ANSWER: C

Which of the following mineral is used in cement industry and plaster of paris? A. Marble B. China Clay C. Gypsum D. Fire Clay

Description : Which of the following mineral is used in cement industry and plaster of paris? A. Marble B. China Clay C. Gypsum D. Fire Clay

Last Answer : ANSWER: C

Ordinary Portland cement is manufactured from (A) Lime stone and clay (B) Gypsum and lime (C) Pozzolana (D) Lime, pozzolana and clay

Description : Ordinary Portland cement is manufactured from (A) Lime stone and clay (B) Gypsum and lime (C) Pozzolana (D) Lime, pozzolana and clay

Last Answer : Answer: Option B

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

Which of the following mineral is used for food and in chemical industries? A. Fire Clay B. Chromite C. Rock Salt D. Gypsum

Description : Which of the following mineral is used for food and in chemical industries? A. Fire Clay B. Chromite C. Rock Salt D. Gypsum

Last Answer : ANSWER: C

Which of the following mineral is used for food and in chemical industries? A. Fire Clay B. Chromite C. Rock Salt D. Gypsum

Description : Which of the following mineral is used for food and in chemical industries? A. Fire Clay B. Chromite C. Rock Salt D. Gypsum

Last Answer : ANSWER: C

Which one of the following is a metal? A. Gypsum B. Iron C. Limestone D. Granite

Description : Which one of the following is a metal? A. Gypsum B. Iron C. Limestone D. Granite

Last Answer : ANSWER: B

Iron Which one of the following is a metal? A. Gypsum B. Iron C. Limestone D. Granite

Description : Iron Which one of the following is a metal? A. Gypsum B. Iron C. Limestone D. Granite

Last Answer : ANSWER: B

Which one of the following is a metal? A. Gypsum B. Iron C. Limestone D. Granite

Description : Which one of the following is a metal? A. Gypsum B. Iron C. Limestone D. Granite

Last Answer : ANSWER: B

Which one of the following is a metal? A. Gypsum B. Iron C. Limestone D. Granite

Description : Which one of the following is a metal? A. Gypsum B. Iron C. Limestone D. Granite

Last Answer : ANSWER: B

Which of the following minerals are required for smelting iron ore? (1) Limestone and gypsum (2) Manganese and limestone (3) Limestone and coal (4) Gypsum and coal

Description : Which of the following minerals are required for smelting iron ore? (1) Limestone and gypsum (2) Manganese and limestone (3) Limestone and coal (4) Gypsum and coal

Last Answer : (2) Manganese and limestone Explanation: Composite volcanoes are most commonly found in island arcs. Most of them are found scattered on the islands adjoining the Pacific Ring of Fire where ... region of high volcanic and seismic activity that surrounds the majority of the Pacific Ocean Basin.

Ca(OH)2 is called (A) Quicklime (B) Slaked lime (C) Limestone (D) Gypsum

Description : Ca(OH)2 is called (A) Quicklime (B) Slaked lime (C) Limestone (D) Gypsum

Last Answer : (B) Slaked lime

The rock in which ground water is LEAST likely to form caverns is: w) sandstone x) limestone y) salt z) rock gypsum

Description : The rock in which ground water is LEAST likely to form caverns is: w) sandstone x) limestone y) salt z) rock gypsum

Last Answer : ANSWER: W -- SANDSTONE 

The black sand of the Hawaiian Islands is composed of which of the following? w) dark limestone x) quartz y) gypsum z) basalt

Description : The black sand of the Hawaiian Islands is composed of which of the following? w) dark limestone x) quartz y) gypsum z) basalt

Last Answer : ANSWER: Z -- BASALT

Which of the following minerals are required for smelting iron ore? (1) Limestone and gypsum (2) Manganese and limestone (3) Limestone and coal (4) Gypsum and coal

Description : Which of the following minerals are required for smelting iron ore? (1) Limestone and gypsum (2) Manganese and limestone (3) Limestone and coal (4) Gypsum and coal

Last Answer :  Manganese and limestone

High quality crop soil requires humus as a major component. Which of the following best describes the composition of humus w) fine sand particles x) decaying organic matter y) mineral like clay matter z) chemical fertilizers

Description : High quality crop soil requires humus as a major component. Which of the following best describes the composition of humus w) fine sand particles x) decaying organic matter y) mineral like clay matter z) chemical fertilizers

Last Answer : ANSWER: X -- DECAYING ORGANIC MATTER 

Why is gypsum used in cement ?

Description : Why is gypsum used in cement ?

Last Answer : Gypsum is used to make cement slowly solidify. When the cement solidifies too fast, the amount of space inside the cement increases , the cement setting becomes weak and brittle. The use of gypsum in cement strengthens the setting of cement. As a result the cement is hard and long lasting.

How does the setting of cement takes place & what is the role of gypsum in setting of cement ?

Description : How does the setting of cement takes place & what is the role of gypsum in setting of cement ?

Last Answer : Ans When mixed with water, the setting of cement takes place to give a hard mass. This is due to the hydration of the molecules of the constituents and their Rearrangement. The purpose of adding gypsum is only to slow down the process of setting of the cement so that it gets sufficiently hardened.

How does the setting of cement takes place & what is the role of gypsum in setting of cement ?

Description : How does the setting of cement takes place & what is the role of gypsum in setting of cement ?

Last Answer : When mixed with water, the setting of cement takes place to give a hard mass. This is due to the hydration of the molecules of the constituents and their rearrangement. The purpose of adding gypsum is only to slow down the process of setting of the cement so that it gets sufficiently hardened. 

The addition of gypsum to portland cement helps in : (1) increasing the strength of cement (2) rapid setting of cement (3) preventing rapid setting of cement (4) reduction in the cost of cement

Description : The addition of gypsum to portland cement helps in : (1) increasing the strength of cement (2) rapid setting of cement (3) preventing rapid setting of cement (4) reduction in the cost of cement

Last Answer : preventing rapid setting of cement

(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.

Description : (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 ... limited amount of calcium sulfate (which controls the set time) and up to 5% minor constituents.

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

Limestone is a raw material used by which industry? (1) Aluminium (2) Fertilizers (3) Cement (4) Petrochemicals

Description : Limestone is a raw material used by which industry? (1) Aluminium (2) Fertilizers (3) Cement (4) Petrochemicals

Last Answer : (3) Cement Explanation: Limestone is used as a rawmaterial for the manufacture of quicklime (calcium oxide), slaked lime (calcium hydroxide), cement and mortar. Clay and shale are also used as raw materials for the production of cement.

Limestone is a raw material used by which industry? (1) Aluminium (2) Fertilizers (3) Cement (4) Petrochemicals

Description : Limestone is a raw material used by which industry? (1) Aluminium (2) Fertilizers (3) Cement (4) Petrochemicals

Last Answer : Cement

Which mineral is mostly found in northern and western mountains of Pakistan? A. Chromite B. Lime-stone C. China Clay D. Gypsum

Description : Which mineral is mostly found in northern and western mountains of Pakistan? A. Chromite B. Lime-stone C. China Clay D. Gypsum

Last Answer : ANSWER: B

Hyderabad has deposits of _____. A. Chromite B. Gypsum C. Fire Clay D. Lime-stone

Description : Hyderabad has deposits of _____. A. Chromite B. Gypsum C. Fire Clay D. Lime-stone

Last Answer : ANSWER: D

Which mineral is mostly found in northern and western mountains of Pakistan? A. Chromite B. Lime-stone C. China Clay D. Gypsum

Description : Which mineral is mostly found in northern and western mountains of Pakistan? A. Chromite B. Lime-stone C. China Clay D. Gypsum

Last Answer : ANSWER: B

Minerals Hyderabad has deposits of _____. A. Chromite B. Gypsum C. Fire Clay D. Lime-stone

Description : Minerals Hyderabad has deposits of _____. A. Chromite B. Gypsum C. Fire Clay D. Lime-stone

Last Answer : ANSWER: D

what kind of soil is treated with gypsum to make it suitable for cropping---? A. Alkaline (Answer) B. Acidic C. Waterlogged D. Soil with excessive clay content

Description : what kind of soil is treated with gypsum to make it suitable for cropping---? A. Alkaline (Answer) B. Acidic C. Waterlogged D. Soil with excessive clay content

Last Answer : A. Alkaline (Answer)

What kind of soil is treated with gypsum to make it suitable for cropping? (1) Alkaline (2) Acidic (3) Water-logged (4) Soil with excessive clay content

Description : What kind of soil is treated with gypsum to make it suitable for cropping? (1) Alkaline (2) Acidic (3) Water-logged (4) Soil with excessive clay content

Last Answer : Alkaline

Match the following : A. Chernozems 1. Rich in calcium carbonate B. Black soil 2. Contains aluminium compound C. Laterite 3. Richest soils in the world D. Terra Rosa 4. Formed in limestone E. Alluvial soil 5. It is a mixture of clay, sand and silt A B C D E (a) 1 2 3 4 5 (b) 3 1 2 4 5 (c) 4 5 3 1 2 (d) 3 4 5 2 1

Description : Match the following : A. Chernozems 1. Rich in calcium carbonate B. Black soil 2. Contains aluminium compound C. Laterite 3. Richest soils in the world D. Terra Rosa 4. Formed in limestone E. Alluvial soil 5. It is a mixture of clay, sand and ... 1 2 3 4 5 (b) 3 1 2 4 5 (c) 4 5 3 1 2 (d) 3 4 5 2 1

Last Answer : Ans: (b)

The lowest resistance grounding on earth A. Sand B. Clay C. Surface loam soil D. Limestone

Description : The lowest resistance grounding on earth A. Sand B. Clay C. Surface loam soil D. Limestone

Last Answer : C. Surface loam soil

When clay hardens into rock, it forms: w) coal x) limestone y) shale z) quartzite

Description : When clay hardens into rock, it forms: w) coal x) limestone y) shale z) quartzite

Last Answer : ANSWER: Y -- SHALE

The principal aquifer of the artesian wells of Florida is a: w) porous sandstone x) fissured limestone y) series of clay beds z) mass of pumice

Description : The principal aquifer of the artesian wells of Florida is a: w) porous sandstone x) fissured limestone y) series of clay beds z) mass of pumice

Last Answer : ANSWER: X -- FISSURED LIMESTONE

The addition of Gypsum to Portland cement helps in–

Description : The addition of Gypsum to Portland cement helps in–

Last Answer : Preventing rapid settling of cement

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

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 function of gypsum addition during cement making is to (A) Increase the density of cement (B) Decrease the cement setting rate (C) Both (A) and (B) (D) Neither (A) nor (B)

Description : The function of gypsum addition during cement making is to (A) Increase the density of cement (B) Decrease the cement setting rate (C) Both (A) and (B) (D) Neither (A) nor (B)

Last Answer : (B) Decrease the cement setting rate

Pick out the wrong statement. (A) Dry process is used for the manufacture of cement, when the raw material is blast furnace slag (B) Portland cement is made employing wet process (C) Gypsum is added to Portland cement to lengthen its setting time (D) None of these

Description : Pick out the wrong statement. (A) Dry process is used for the manufacture of cement, when the raw material is blast furnace slag (B) Portland cement is made employing wet process (C) Gypsum is added to Portland cement to lengthen its setting time (D) None of these

Last Answer : (D) None of these

addition of Gypsum to Portland cement helps in

Description : addition of Gypsum to Portland cement helps in

Last Answer : Preventing rapid settling of cement

Setting time of cement increases by adding (A) Gypsum (B) Hydrogen peroxide (C) Calcium chloride (D) Sodium oxide

Description : Setting time of cement increases by adding (A) Gypsum (B) Hydrogen peroxide (C) Calcium chloride (D) Sodium oxide

Last Answer : Answer: Option A

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

Which one of the following is an air binding material? (A) Gypsum (B) Acid-resistant cement (C) Quick lime (D) All of these

Description : Which one of the following is an air binding material? (A) Gypsum (B) Acid-resistant cement (C) Quick lime (D) All of these

Last Answer : Answer: Option D

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

Rapid hardening cement attains early strength due to (A) Larger proportion of lime grounded finer than normal cement (B) Lesser proportion of lime grounded coarser than normal cement (C) Lesser proportion of lime grounded finer than normal cement (D) Excess percentage of gypsum

Description : Rapid hardening cement attains early strength due to (A) Larger proportion of lime grounded finer than normal cement (B) Lesser proportion of lime grounded coarser than normal cement (C) Lesser proportion of lime grounded finer than normal cement (D) Excess percentage of gypsum

Last Answer : Answer: Option A