The maximum percentage of chemical ingredient of cement is
[ A ] Iron oxide
[ B ] Silica
[ C ] Lime
[ D ] Magnesium oxide

1 Answer

Answer :

[ C ] Lime

Related questions

Description : The maximum percentage of chemical ingredient of cement is that of (A) Magnesium oxide (B) Iron oxide (C) Silica (D) Lime

Last Answer : Answer: Option D

Description : The minimum percentage of chemical ingredient of cement is [ A ] Iron oxide [ B ] Silica [ C ] Lime [ D ] Magnesium oxide

Last Answer : [ D ] Magnesium oxide

Description : The maximum percentage of chemical ingredient of cement is (a) Alumina (b) Iron oxide (c) Lime (d) Silica

Last Answer : (c) Lime

Description : The minimum percentage of chemical ingredient of cement is that of (A) Magnesium oxide (B) Iron oxide (C) Alumina (D) Lime

Last Answer : Answer: Option A

Description : Which of the following ingredient of cement when added in excess quantity, causes the cement to set slowly. (a) Lime (b) Silica (c) Alumina (d) Iron oxide

Last Answer : Lime is a common ingredient in cement. It is typically added in small amounts to help the cement set more quickly. Adding too much lime can cause the cement to set slowly. Alumina, silica, and iron oxide are also common ingredients in cement, but they do not have an effect on the setting time.

Description : Pick up the correct proportions of chemical ingredients of cement (A) Lime : Silica : Alumina : Iron oxide : 63 : 22 : 6 : 3 (B) Silica : Lime : Alumina : Iron oxide : 63 : 22 : 6 : 3 (C) Alumina : Silica : ... oxide : 63 : 22 : 6 : 3 (D) Iron oxide : Alumina : Silica : Lime : 63 : 22 : 6 : 3

Last Answer : Answer: Option A

Description : In order to provide colour, hardness and strength to the cement, the ingredient used is (a) Lime (b) Solica (c) Alumina (d) Iron oxide

Last Answer : (d) Iron oxide

Description : Efflorescence is cement is caused due to the excess of (a) Lime (b) Silica (c) Alkalies (d) Iron oxide

Last Answer : (c) Alkalies

Description : The proportion of lime, silica, alumina and iron oxide in a Portland cement is (a) 63:22:6:3 (b) 63:22:3:6 (c) 22:63:6:3 (d) All the above

Last Answer : (a) 63:22:6:3

Description : White cement contains less amount of ___________ [ A ] Lime [ B ] Silica [ C ] Alumina [ D ] Iron oxide

Last Answer : [ D ] Iron oxide

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

Description : The minimum percentage of silica, alumina and ferric oxide in lime for white washing, is (A) 20 (B) 15 (C) 5 (D) 0

Last Answer : Answer: Option D

Description : Which of the following pairs gives a correct combination of the useful and harmful constituents respectively of a good brick earth? (A) Lime stone and alumina (B) Silica and alkalies (C) Alumina and iron (D) Alkalies and magnesium

Last Answer : Answer: Option B

Description : The main ingredient of a good quality brick earth, is (A) Magnesia (B) Lime (C) Silica (D) Alumina

Last Answer : Answer: Option D

Description : The main ingredients of Portland cement are (A) Lime and silica (B) Lime and alumina (C) Silica and alumina (D) Lime and iron

Last Answer : Answer: Option A

Description : Efflorescence in cement is caused due to an excess of (A) Alumina (B) Iron oxide (C) Silica (D) Alkalis

Last Answer : Answer: Option D

Description : Efflorescence in cement is caused due to an excess of [ A ] Alkalies [ B ] Silica [ C ] Iron oxide [ D ] Alumina

Last Answer : [ A ] Alkalies

Description : The fire clay contains pure (A) Lime (B) Oxide of iron (C) Hydrated aluminium silicate (D) Magnesium

Last Answer : Answer: Option C

Description : Chief constituent of ordinary Portland cement is [ A ] Lime [ B ] Alumina [ C ] Magnesia [ D ] Iron oxide

Last Answer : [ A ] Lime

Description : The main constituent which imparts hydraulicity to hydraulic lime is (A) Calcium oxide (B) Silica (C) Clay (D) Water

Last Answer : Answer: Option C

Description : Pick up the correct statement from the following: (A) Lime in excess, causes the cement to expand and disintegrate (B) Silica in excess, causes the cement to set slowly (C) Alumina in excess, reduces the strength of the cement (D) All the above

Last Answer : Answer: Option D

Description : 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 ... time also increases (C) The excess amount of alumina weakens the cement (D) All the above

Last Answer : Answer: Option D

Description : For the manufacture of Portland cement, the proportions of raw materials used, are (A) Lime 63% ; silica 22% ; other ingredients 15% (B) Lime 22% ; silica 63% ; other ingredients 15% (C) Silica 40% ; lime 40% ; other ingredients 20% (D) Silica 70% ; lime 20% ; other ingredients 10%

Last Answer : Answer: Option A

Description : Pick up the correct statement from the following: (A) The percentage of absorption for firebricks varies from 5 to 10 (B) The percentage of silica in silica bricks is to the extent of about 95 to 97 ... to 2 percent of lime in silica bricks is added to act as binding material (D) All the above

Last Answer : Answer: Option D

Description : Soundness test of cement is done to determine its a) Durability in seawater b) Free lime content* c) Iron oxide content d) Alumina content

Last Answer : b) Free lime content*

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

Description : The slag which floats on the surface of the molten iron generally contains (A) Lime (CaO) 45% (B) Silica (SiO2) 35% (C) Alumina (Al2O3) 12% and MgO, CaSO4, KMnO2 and FeO 8% (D) All the above

Last Answer : Answer: Option D

Description : The slag which floats on the surface of the molten iron generally contains (A) Lime (CaO) 45% (B) Silica (SiO2) 35% (C) Alumina (Al2O3) 12% and MgO, CaSO4, KMnO2 and FeO 8% (D) All these

Last Answer : Answer: Option D

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

Description : The main ingredients of Portland cement are a) Lime and silica* b) Lime and Alumina c) Alumina magnesia d) Silica and Alumina

Last Answer : a) Lime and silica*

Description : The lime which contains high percentage of calcium oxide, is generally called (A) Fat lime (B) Rich lime (C) White lime (D) None of these

Last Answer : Answer: Option D

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

Description : Write balanced chemical equations for the following word equations: (a) Iron + Chlorine → Iron (III) chloride (b) Magnesium + dil sulphuric acid → Magnesium sulphate + water (c) Magnesium + oxygen → ... oxide (d) Calcium oxide + water → Calcium hydroxide (e) Sodium + chlorine → Sodium chloride

Last Answer : (a) Iron + Chlorine → Iron (III) chloride 4Fe + 3Cl2 → 2F2Cl3 (b) Magnesium + dil sulphuric acid → Magnesium sulphate + water 2Mg + 2H2SO4 → 2MgSO4 + 2H2 (c) Magnesium + oxygen → Magnesium oxide 2Mg ... hydroxide CaO + H2O → Ca(OH)2 (e) Sodium + chlorine → Sodium chloride 2Na + Cl2 → 2NaCl

Description : Pick up the correct statement from the following: (A) Roasting is not necessary if iron ore is an oxide (B) Impurities float on the molten iron as slag (C) The slag contains lime about 45% (D) All the above

Last Answer : Answer: Option D

Description : Pick up the constituent of good brick earth whose excess causes the raw bricks shrink and warp during drying and burning, from the following: (A) Alumina (B) Lime (C) Iron-oxide (D) Magnesia

Last Answer : Answer: Option A

Description : Asbestos (A) Is a natural fibrous mineral substance (B) Is composed of hydrous silicates of calcium and magnesium (CaSiO3, 3MgSiO3) (C) Contains iron oxide and alumina (D) All the above

Last Answer : Answer: Option D

Description : Which of the following is used as lubricant? (1) Graphite (2) Silica (3) Diamond (4) Iron Oxide

Last Answer : (1) Graphite Explanation: Graphite is used as a lubricant due to its slippery nature. Due to its loosely intact carbon atoms or free electrons, they can move around easily from one place to another, making graphite a good conductor of electricity.

Description : Which of the following is used as lubricant? (1) Graphite (2) Silica (3) Diamond (4) Iron Oxide

Last Answer : (1) Graphite Explanation: Graphite is used as a lubricant due to its slippery nature. Due to its loosely intact carbon atoms or free electrons, they can move around easily from one place to another, making graphite a good conductor of electricity.

Description : White colour of soil is due to the presence of – a) Silica b) Iron c) Manganese oxide d) All of these

Last Answer : c) Manganese oxide

Description : Catalyst used in Haber's process for ammonia production is (A) Reduced iron oxide (B) Nickel (C) Vanadium pentoxide (D) Silica gel

Last Answer : (A) Reduced iron oxide

Description : Which of the following is an adsorbent for removal of nitrogen oxides from gas/air? (A) Active carbon (B) Silica gel (C) Bog iron (iron oxide) (D) Pulverised limestone

Last Answer : (B) Silica gel

Description : Which of the following is not a raw material used for the manufacture of ordinary glass? (A) Iron oxide (B) Soda ash (C) Limestone (D) Silica

Last Answer : (A) Iron oxide

Description : Consider the following statements: Maximum slenderness ratio of load-bearing masonry walls for a dwelling having more than two storeys shall not exceed. 1. 12, if lime mortar is used 2. 18, if cement-lime mortar 1:2:9 is used 3. 24, ... ? (a) 1 and 2 only b) 2 and 3 only c) 1 and 3 only d)1, 2 and 3

Last Answer : b) 2 and 3 only

Description : A prime coat is given to steel work with (A) An oxide of iron paint (B) A mixture of white lead and lead paint (C) A special paint (D) Cement paint

Last Answer : Answer: Option B

Description : Portland cement manufactured from pure white chalk and clay but free from iron-oxide, is known as (A) Quick setting cement (B) Rapid hardening cement (C) White cement (D) Low heat Portland cement

Last Answer : Answer: Option C

Description : A good brick earth should contain: (A) About 20% to 30% of alumina (B) About 50% to 60% of silica (C) Not more than 5% of lime (D) All the above

Last Answer : Answer: Option D

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

Description : Rice husk is used for making cement because it contains a. Silica b. Calcium c. Iron d. None of these

Last Answer : a. Silica

Description : The main constituent of fly-ash, is (A) Aluminium oxide (B) Silica (C) Ferrous oxide (D) All of these

Last Answer : Answer: Option D

Description : Which of the following if present in iron ore, enhances its value? (A) Alumina (B) Alkali oxide (C) Lime & Magnesia (D) None of these

Last Answer : C) Lime & Magnesia