Description : The lime which contains mainly calcium oxide and slacks with water, is (A) Fat lime (B) Quick lime (C) Hydraulic lime (D) Poor lime
Last Answer : Answer: Option B
Description : Quicklime is a) Calcium carbonate b) Calcium bicarbonate c) Calcium oxide* d) Calcium hydroxide
Last Answer : c) Calcium oxide*
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 : 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 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 : 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 : The commonly used lime in white washing is a) Hydraulic lime b) Slaked lime c) Plain lime d) White lime*
Last Answer : d) White lime*
Description : Hydraulic lime is not used in plastering because it may result in a) Blistering* b) Efflorescence c) Flaking d) Fluorescence
Last Answer : a) Blistering*
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 : 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
Description : Ca(OH)2 is called (A) Quicklime (B) Slaked lime (C) Limestone (D) Gypsum
Description : __________ of quicklime produces slaked lime. (A) Hydration (B) Dehydration (C) Hydrogenation (D) None of these
Last Answer : (A) Hydration
Description : (A) Washing soda (B) Soda ash (C) Slaked lime (D) Quicklime
Last Answer : (A) Washing soda
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 : 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
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 : (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 : Quick lime is (A) Calcium carbonate (B) Calcium oxide (C) Calcium hydroxide (D) None of the above
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 : Sand is mixed with lime to a) Reduced cost b) Reduced setting time c) Prevent shrinkage and cracking* d) Improve visual appearance
Last Answer : c) Prevent shrinkage and cracking
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 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 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 : Name the material which is separated from molten steel during chemical reaction of A.T welding? (i) Aluminium oxide (slag). * (ii) Ferrous Oxide (iii) Aluminium (iv) Ferrous
Last Answer : (i) Aluminium oxide (slag). *
Description : Putty is made up of a) White lead and turpentine b) Powdered chalk and raw linseed oil* c) Red lead and linseed oil d) Zinc oxide and boiled linseed oil
Last Answer : b) Powdered chalk and raw linseed oil*
Description : Which one of the following impurity is not desirable in the soil used for brick formation a) Alkali b) Kankar c) Iron oxide d) Alkali & Kankar*
Last Answer : d) Alkali & Kankar*
Description : aint Red Oxide confirms to IS
Last Answer : 123
Description : Paint Zinc chromate Red oxide primer confirms to IS
Last Answer : 2074
Description : Shelf life of Paint Red Oxide Ready mixed (IS : 123) a) 4 month b) 1 year* c) 6 month d) None of the above
Last Answer : b) 1 year*
Description : While painting with red oxide paint, a little quantity of ………..shall be added to the paint while doing the first coat to distinguish it from the second coat a) little blue paint b) lamp black* c) red paint d) green paint
Last Answer : b) lamp black*
Description : In areas where there is severe corrosion Finishing coat will be a) Two coats of aluminium paint to IS : 2339* b) One coat of zinc chromate priming to IS : 104 e) Two cover coats of red oxide paint to IS :123 f) One coat of zinc chrome - red oxide priming to IS : 2074
Last Answer : a) Two coats of aluminium paint to IS : 2339*
Description : In areas where there is no severe corrosion Finishing coat will be a) Two coats of aluminium paint to IS : 2339 b) One coat of zinc chromate priming to IS : 104 c) Two cover coats of red oxide paint to IS :123* d) One coat of zinc chrome - red oxide priming to IS : 2074
Last Answer : c) Two cover coats of red oxide paint to IS :123*
Description : What is the full form of PQRS used for Track renewal works. a. Plasser quick Relaying system* b. Please quick return services c. Poor Quality renewal system d. None of above
Last Answer : a. Plasser quick Relaying system*
Description : Defect of lack of fusion is mainly due to? (i) Improper heating.* (ii) Improper Gap (iii) Improper grinding (iv) None of above
Last Answer : (i) Improper heating.*
Description : Defect of short of metal is mainly due to? (i) Less gap (ii) Excessive gap* (iii) Less weight of position (iv) None of above
Last Answer : (ii) Excessive gap*
Description : Defect of cracks in weld is mainly due to? (i) Early opening of mould.* (ii) Early trimming of weld (iii) Early grinding of weld (iv) None of above
Last Answer : (i) Early opening of mould.*
Description : Life of Portion mainly depend upon? (i) Quality of packing (ii) Storage condition (iii) Quality of packing and storage condition.* (iv) Ingredients of portions
Last Answer : (iii) Quality of packing and storage condition.*
Description : Lime water contains (a) sodium hydroxide (b) calcium hydroxide (c) sodium carbonate (d) calcium chloride
Last Answer : Ans:(b)
Description : Function of Calcium fluoride/flour spar in portion is? (i) To separate slag* (ii) To separate aluminum (iii) To separate ferrous (iv) No separation
Last Answer : (i) To separate slag*
Description : The Most common admixture used to accelerate the initial setting of concrete is a) Gypsum b) Calcium chloride* c) Calcium carbonate d) Calcium bicarbonate
Last Answer : b) Calcium chloride*
Description : When limestone is subjected to high temperature and pressure known as Metamorphism, it results in the formation of? a. Granite b. Quicklime c. Sandstone d. Marble
Last Answer : d. Marble
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