Description : The lime which contains mainly calcium oxide and slacks with water, is known as a) Fat lime b) Quicklime* c) Hydraulic lime d) Poor line
Last Answer : b) Quicklime*
Description : Pick up the correct statement from the following: (A) Slaked lime contains calcium hydroxide (B) Quick lime contains calcium oxide (C) Slaked lime may be obtained from quick lime (D) All the above
Last Answer : Answer: Option D
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 : Pick up the correct statement from the following: (A) Quick lime is obtained by burning pure lime stone (B) Hydraulic lime is obtained by burning lime stone containing clay 5% to 30% (C) Poor lime is obtained by burning lime stone containing impurities more than 5% (D) All the above
Description : For construction of structures under water, the type of lime used, is (A) Hydraulic lime (B) Fat lime (C) Quick lime (D) Pure lime
Last Answer : Answer: Option A
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 : Lime mortar is generally made with (A) Quick lime (B) Fat lime (C) Hydraulic lime (D) Plain lime
Description : The commonly used lime in white washing, is (A) White lime (B) Fat lime (C) Hydraulic lime (D) Quick lime
Last Answer : Answer: Option B
Description : Quick lime is (A) Calcium carbonate (B) Calcium oxide (C) Calcium hydroxide (D) None of the above
Description : Which of the following lime can set under water also a) Fat Lime b) Lean lime* c) Hydraulic line d) Quick lime
Last Answer : b) Lean lime*
Description : How is Calcium oxide (quick lime), CaOPrepared?
Last Answer : It is prepared on a commercial scale by heating limestone(CaCO3) in a rotary kiln at 1070-1270K. The carbon dioxide is removed as soon as it is produced to enable the reaction to proceed to completion.
Description : Hydraulic lime is obtained by (A) Burning of lime stone (B) Burning of kankar (C) Adding water to quick lime (D) Calcination of pure clay
Description : Study the following statements. (i) Hydraulic lime is suitable for white washing, (ii) Fat lime is suitable for whitewashing, (iii) Hydraulic lime is suitable for making mortar, (iv) Fat lime is suitable for making mortar.
Last Answer : Answer: Option B (B) (ii) and (iii)
Description : Pick up the incorrect statement from the following: (A) Hydraulic lime is generally obtained by burning kankar (B) Hydraulic lime sets slowly as compared to fat lime (C) Hydraulic lime is generally used in lime mortar (D) None of these
Description : The product obtained on mixing calcium oxide with water is called (A) Quicklime (B) Slaked lime (C) Milk of lime (D) None of these
Last Answer : (B) Slaked lime
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 : White cement contains less amount of ___________ [ A ] Lime [ B ] Silica [ C ] Alumina [ D ] Iron oxide
Last Answer : [ D ] Iron oxide
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 : Lime water turns milky when carbon dioxide is passed through it. It is due to the for mation of: (1) Calcium Carbonate (2) Barium Carbonate (3) Calcium Hydrogen Carbonate (4) Calcium Oxide
Last Answer : (1) Calcium Carbonate Explanation: When carbon dioxide is passed through lime water for a short time, it turns lime water milky due to formation of a white precipitate of calcium carbonate.
Description : Addition of calcium oxide to water produces (A) Exothermic heat (B) Hissing sound (C) Slaked lime (D) All (A), (B) & (C)
Last Answer : (D) All (A), (B) & (C)
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 : 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
Description : The initial setting time of hydraulic lime, is (A) 30 minutes (B) 60 minutes (C) 90 minutes (D) 120 minutes
Description : Pick up the correct statement from the following: (A) The phenomenon of quicksand generally occurs in the cohesionless soil (B) At critical hydraulic gradient, the saturated sand becomes quick (C) The critical gradient depends on the void ratio and the specific gravity (D) All the above
Last Answer : (D) All the above
Description : If the unit weight of sand particles is 2.696 g/cc. and porosity in loose state is 44%, the critical hydraulic gradient for quick sand condition, is (A) 0.91 (B) 0.92 (C) 0.93 (D) 0.95
Last Answer : (D) 0.95
Description : The hydraulic head that would produce a quick condition in a sand stratum of thickness 1.5 m, specific gravity 2.67 and voids ratio 0.67 is equal to (A) 1.0 m (B) 1.5 m (C) 2.0 m (D) 3 m
Last Answer : (B) 1.5 m
Description : Lime water contains (a) sodium hydroxide (b) calcium hydroxide (c) sodium carbonate (d) calcium chloride
Last Answer : Ans:(b)
Description : Putty is (A) Made with finely powdered chalk and linseed oil (B) Used for fixing glass panes (C) Softened by a solution of pearl ash and quick-lime soaked in water (D) All the above
Description : Quick lime (A) Generates heat when added to water (B) Reacts with carbon dioxide (C) May be used for white-washing (D) All the above
Description : Which one of the following is an air binding material? (A) Gypsum (B) Acid-resistant cement (C) Quick lime (D) All of these
Description : Formula for quick lime, is (A) CaCO3 (B) Ca(OH)2 (C) CO3CO2 (D) None to thes
Description : Quick lime (or caustic lime) (A) Is obtained by the calcination of pure lime stone (B) Has great affinity to moisture (C) Is amorphous (D) All the above
Description : Quick lime is (i) Slow in setting (ii) Rapid in slacking (iii) Good in strength The correct answer is (A) Only (i) (B) Only (ii) (C) Both (i) and (ii) (D) Both (ii) and (
Description : The minimum percentage of chemical ingredient of cement is that of (A) Magnesium oxide (B) Iron oxide (C) Alumina (D) Lime
Description : The maximum percentage of chemical ingredient of cement is that of (A) Magnesium oxide (B) Iron oxide (C) Silica (D) Lime
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 : The minimum percentage of silica, alumina and ferric oxide in lime for white washing, is (A) 20 (B) 15 (C) 5 (D) 0
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 : Efflorescence is cement is caused due to the excess of (a) Lime (b) Silica (c) Alkalies (d) Iron oxide
Last Answer : (c) Alkalies
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 : 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 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 : The maximum percentage of chemical ingredient of cement is (a) Alumina (b) Iron oxide (c) Lime (d) Silica
Last Answer : (c) Lime
Description : Chief constituent of ordinary Portland cement is [ A ] Lime [ B ] Alumina [ C ] Magnesia [ D ] Iron oxide
Last Answer : [ A ] Lime
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 ] Iron oxide [ B ] Silica [ C ] Lime [ D ] Magnesium oxide
Last Answer : [ C ] Lime
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
Description : Milk contains very poor amounts of (A) Calcium (B) Phosphate (C) Iron (D) Riboflavin
Last Answer : Answer : C
Description : Pick up the correct statement from the following: (A) Lime is available in Free State (B) Lime is available by dissolving calcium carbonate in water (C) Lime is available by calcining calcium carbonate at 900°C (D) Lime is nothing but calcium chloride