Description : Main constituents of Portland cement are calcium aluminate and (A) Gypsum (B) Silicates (C) Sodium silicate (D) Carbonates
Last Answer : (B) Silicates
Description : Finely ground calcium aluminate & silicate is a/an (A) Cermet (B) Cement (C) Abrasive (D) Explosive
Last Answer : (B) Cement
Description : The compound of Portland cement which reacts immediately with water and also sets first is (A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra calcium alumino ferrite
Last Answer : Answer: Option C
Description : Initial setting of cement is caused due to (A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra calcium alumino ferrite
Description : The compound of Portland cement which contributes to the strength after two to three years is (A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra-calcium alumino ferrite
Last Answer : Answer: Option B
Description : Pick up the compound responsible for early strength of cement from the following: (A) Tetra-calcium alumino-ferrite (B) Tri-calcium silicate (C) Tri-calcium aluminate (D) Di-calcium silicate
Description : Good quality cement contains higher percentage of (A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra calcium alumino ferrite
Last Answer : Answer: Option A
Description : Ultimate strength to cement is provided by (A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra calcium alumino ferrite
Description : Rapid hardening cement contains (A) Tri-calcium silicate (B) Tri-calcium aluminate (C) Tetra-calcium alumino-ferrite (D) Di-calcium silicate
Description : In the cement the compound quickest to react with water, is (A) Tri-calcium aluminate (B) Tetra-calcium alumino-ferrite (C) Tri-calcium silicate (D) Di-calcium silicate
Description : The main constituent of cement which is responsible for initial setting of cement is (A) Di-calcium silicate (B) Tri-calcium silicate (C) Tri-calcium aluminate (D) All of the above
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
Description : Early attainment of strength in rapid hardening cement is mainly due to (A) Gypsum (B) Finer grinding (C) Tri-calcium silicate (D) Tri-calcium aluminate
Description : The constituent of cement which is responsible for all the undesirable properties of cement is (A) Di-calcium silicate (B) Tri-calcium silicate (C) Tri-calcium aluminate (D) Tetra calcium alumino ferrite
Description : The first compound which reacts with water when mixed with cement is (a) Tricalcium Aluminate (b) Tricalcium silicate (c) Di-calcium silicate (d) Teracalcium aluminate
Last Answer : (a) Tricalcium Aluminate
Description : About 70% to 80% of cement is contributed by [ A ] Tricalcium silicate and Tricalcium aluminate [ B ] Tricalcium silicate and Dicalcium silicate [ C ] Tricalcium Aluminate and Dicalcium silicate [ D ] Tricalcium Aluminate and Tetra calcium Aluminoferrite
Last Answer : [ B ] Tricalcium silicate and Dicalcium silicate
Description : Hydration of cement is due to chemical action of water with (A) Tricalcium silicate and dicalcium silicate (B) Dicalcium silicate and tricalcium aluminate (C) Tricalcium aluminate and tricalcium alumino ferrite (D) All the above
Last Answer : Answer: Option D
Description : Hydration of cement is due to the chemical action of water with. (a) Tricalcium silicate (b) Dicalcium silicate (c) Tricalcium aluminate (d) All of these
Last Answer : (d) All of these
Description : A slow setting cement will have higher percentage of a) tricalcium aluminate b) tricalcium silicate c) Gypsum d) Dicalcium silicate*
Last Answer : C2s
Description : The constituent of cement which act as Binders are a) Sand and silica b) Silica and carbon c) tricalcium silicate dicalcium silicate and carbon d) tricalcium aluminate,dicalcium silicate and tricalcium silicate *
Last Answer : d) tricalcium aluminate,dicalcium silicate and tricalcium silicate *
Description : The development of first 28 days strength is on account of the hydration of (a) Tricalcium silicate (b) Dicalcium silicate (c) Tricalcium aluminate (d) Tetra calcium alumina ferrite
Last Answer : (a) Tricalcium silicate
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
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 : __________ is the major constituent of the Portland cement. (A) Calcium carbonate (B) Calcium oxide (C) Tricalcium silicate (D) Calcium sulphate
Last Answer : (C) Tricalcium silicate
Description : Di-calcium silicate (C2S) (A) Hydrates rapidly (B) Generates less heat of hydration (C) Hardens rapidly (D) Provides less ultimate strength to cement
Description : Mixture of sodium silicate and calcium silicate is called
Last Answer : glass.
Description : ‘Plaster of paris’ chemically known as (1) Sodium Aluminate (2) Calcium sulphate (3) Spdium bicarbonate (4) Sodium acetate
Last Answer : (2) Calcium sulphate Explanation: Calcium sulphate is a calcium salt that is used for a variety of purposes. It exists in various forms and states of hydration.
Description : Which is the most widely used coagulant for the treatment of turbid water? (A) Alum (aluminium sulphate) (B) Lime (C) Ferric chloride (D) Sodium aluminate
Last Answer : (A) Alum (aluminium sulphate)
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 : Pavement is said to be flexible if it contains (A) Water bound macadam surface (B) Stabilised soil base constructed of lime cement or tar (C) Bitumen-bound stone layer of varying aggregates (D) All the above
Description : The commonly used material in the manufacture of cement is (A) Sand stone (B) Slate (C) Lime stone (D) Graphite
Last Answer : (C) Lime stone
Description : Ordinary Portland cement is manufactured from (A) Lime stone and clay (B) Gypsum and lime (C) Pozzolana (D) Lime, pozzolana and clay
Description : The commonly used raw material in the manufacture of cement, is (A) Slate (B) Sand stone (C) Lime stone (D) Basalt
Description : The stone masonry of finely dressed stones laid in cement or lime, is (A) Random rubble masonry (B) Coursed rubble masonry (C) Dry rubble masonry (D) Ashlar masonry
Description : Calcareous and argillaceous materials used in manufacture of cement consists of (a) Lime stone (b) Chalk (c) Shales (d) All the above
Last Answer : (d) All the above
Description : Tricalcium aluminate (C3A) (A) Reacts fast with water (B) Generates less heat of hydration (C) Causes initial setting and early strength of cement (D) Does not contribute to develop ultimate strength
Description : Inside the ____ is a gas generator containing a mixture of NaN3 (Sodium Azide), KNO3 (Potassium Nitrate) and SiO2 (Silicon Dioxide). When the undesired event happens, an electric circuit is ... chemical reactions generate nitrogen gas that fills ____ in 20 to 30 milliseconds. Fill up the blank
Last Answer : Air-bags in automobiles.
Description : What is the-type of reaction of calcium oxide plus silicon dioxide?
Last Answer : Need answer
Description : Consider the following statements: 1. Bordeaux mixture consists of sodium bromide and lime 2. Toothpastes contain calcium carbonate 3. Zinc amalgam is used in dental fillings 4. Liquid sodium is used as a coolant in nuclear reactors The ... 1, 3 and 4 only (c) 2, 3 and 4 only (d) 1, 2 and 3 only
Last Answer : Ans:(c)
Description : Nitrolime is (A) Calcium nitrate (B) Calcium ammonium nitrate (C) A mixture of nitric acid and lime (D) A mixture of ammonium nitrate and calcium nitrate
Last Answer : (B) Calcium ammonium nitrate
Description : Cement paints usually (A) Contain hydrated lime (B) Contain 5% to 10% colour pigments (C) Contain 5% sodium chloride (D) All the above
Description : Quartz is made of – (1) Calcium Sulphate (2) Calcium Silicate (3) Sodium Sulphate (4) Sodium Silicate
Last Answer : (4) Sodium Silicate Explanation: Quartz is an abundant mineral in the Earth's continental crust. It is made tip of a continuous framework of SiO4 silicon-oxygen tetrahedra, wit Ii each oxygen being shared between two tetrahedra, giving an overall formula SiO2.
Description : The chemical name or Quartz is – (1) Calcium oxide (2) Calcium phosphate (3) Sodium phosphate (4) Sodium silicate
Last Answer : (4) Sodium silicate Explanation: Quartz is a compound of one part silicon and two parts of oxygen, silicon dioxide, SiO2. Quartz is the most abundant silica mineral. It is used in a ... silicon alloys, etc. The various grades of sodium silicate are characterized by their SiO2:Na2O weight ratio.
Description : Glass is mainly composed of - (1) Sodium silicate (2) Calcium carbonate (3) Calcium hydroxide (4) Sodium bicarbonate
Last Answer : (1) Sodium silicate Explanation: Glass is made from silica (SiO₂) and soda lime, which react to form sodium silicate.
Description : Sodium calcium silicate is called _______. (1) Hard glass (2) Borosilicate glass (3) Soft glass (4) Jena glass
Last Answer : (3) Soft glass Explanation: Ordinary glass which is also known as soda glass or soft glass is a mixture of sodium silicate, Calcium silicate, and Silica.
Description : Slag is a name given for - (1) molten iron (2) molten sand (3) molten alumina (4) molten calcium silicate
Last Answer : (3) molten alumina Explanation: Slag is a partially vitreous byproduct of the process of smelting ore, which separates the desired metal fraction from the unwanted fraction. A good example is steelmaking ... separated from the metal, and assist in the removal of sulfur and phosphorus from the steel.
Description : Which of the following is the primary reason for adding calcium carbonate to the reduction process of iron oxide ores ? The calcium carbonate: w) acts as an oxidizing agent x) removes silicate waste products y) acts as a reducing agent z) removes sulfur waste products
Last Answer : ANSWER: X -- REMOVES SILICATE WASTE PRODUCTS
Description : The chemical name of quartz is (1) Calcium oxide (2) Calcium phosphate (3) Sodium phosphate (4) Sodium silicate
Last Answer : Sodium silicate
Description : Slag is a name given for (1) molten iron (2) molten sand (3) molten alumina (4) molten calcium silicate
Last Answer : molten alumina
Description : Quartz is made of (1) Calcium Sulphate (2) Calcium Silicate (3) Sodium Sulphate (4) Sodium Silicate
Last Answer : Sodium Silicate