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 maximum percentage of chemical ingredient of cement is [ A ] Iron oxide [ B ] Silica [ C ] Lime [ D ] Magnesium oxide
Last Answer : [ C ] Lime
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 : 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 : 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 : 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
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 : 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
Description : The main ingredient of a good quality brick earth, is (A) Magnesia (B) Lime (C) Silica (D) Alumina
Description : The main ingredients of Portland cement are (A) Lime and silica (B) Lime and alumina (C) Silica and alumina (D) Lime and iron
Description : Efflorescence in cement is caused due to an excess of (A) Alumina (B) Iron oxide (C) Silica (D) Alkalis
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 : Chief constituent of ordinary Portland cement is [ A ] Lime [ B ] Alumina [ C ] Magnesia [ D ] Iron oxide
Last Answer : [ A ] Lime
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 : 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
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
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 : 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
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
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 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 : 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
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
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
Description : The percentage of alumina and silica in good fire clay vary respectively is (A) 25, 75 (B) 30, 70 (C) 35, 65 (D) All of these
Description : The major constituents of glass are (A) Lime, clay and soda ash (B) Sand, lime and soda ash (C) Silica, alumina and clay (D) Silica, alumina and soda ash
Last Answer : (B) Sand, lime and soda ash
Description : Which of the following constituents impart plasticity to brick earth a) Alumina* b) Silica c) Lime d) Magnesia
Last Answer : a) Alumina*
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 : Major component of flint glass is (A) Lead oxide (B) Silica (C) Alumina (D) Soda
Last Answer : (A) Lead oxide
Description : Which of the following ingredients of the brick earth enables the brick to retain its shape? (A) Alumina (B) Silica (C) Iron (D) Magnesia
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%
Description : Rotary kilns in cement industry are lined with _________bricks. (A) Fireclay (B) Silica (C) Lead (D) High alumina & high magnesia
Last Answer : (D) High alumina & high magnesia
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
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
Description : Which of the following is an adsorbent used for the removal of SO2 from gas/air? (A) Bog iron (B) Limestone powder or alkalised alumina (C) Silica gel (D) Active carbon
Last Answer : (B) Limestone powder or alkalised alumina
Description : Which of the following ingredients of Brick earth enables the brick to retain its shape a) Alumina b) Silica* c) Iron d) Magnesia
Last Answer : b) Silica*
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 : Slate (A) Is a metamorphic rock (B) Splits into thin sheets along its bedding planes (C) Has a smooth surface and contains alumina and silica (D) Possesses good water absorption capacity
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
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
Description : Identify the type of soil on the basis of the given characteristics - 1. They are rich in lime, iron, magnesia and alumina. 2. They are generally clayey, deep and impermeable. 3. They are mainly found ... the given alternatives - a. Laterite soil b. Red and yellow soil c. Saline soil d. Black soil
Last Answer : d. Black soil
Description : The fire clay contains pure (A) Lime (B) Oxide of iron (C) Hydrated aluminium silicate (D) Magnesium
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
Description : The ‘IC’ chips used in computers are made of (a) chromium (b) iron oxide (c) alumina (d) silicon
Last Answer : Ans:(d)
Description : Catalyst used in the 'catalytic converter' employed in automobile exhaust line for complete combustion/oxidation of carbon monoxide, nitrogen oxides and hydrocarbons is (A) Alumina (B) Platinum (C) Vanadium pentoxide (D) Iron oxide
Last Answer : Option B
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.