Description : Soundness test of cement determines (A) Quality of free lime (B) Ultimate strength (C) Durability (D) Initial setting
Last Answer : Answer: Option A
Description : Le Chatelier apparatus is used to determine which of the following properties for cement A) Soundness* b) Initial setting time c) Compressive strength d) Tensile strength
Last Answer : A) Soundness*
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 : 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 chemical ingredient of cement is that of (A) Magnesium oxide (B) Iron oxide (C) Alumina (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 : 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 : White cement contains less amount of ___________ [ A ] Lime [ B ] Silica [ C ] Alumina [ D ] Iron oxide
Last Answer : [ D ] Iron oxide
Description : Which of the following constituents impart plasticity to brick earth a) Alumina* b) Silica c) Lime d) Magnesia
Last Answer : a) Alumina*
Description : “Composite sleeper index” is employed to determine a) sleeper density requirement b) number of fixtures required for a particular type of sleeper c) durability of sleeper d) mechanical strength of wooden sleepers and thereby gives its suitability as to be used as li sleepers.*
Last Answer : d) mechanical strength of wooden sleepers and thereby gives its suitability as to be used as li sleepers.*
Description : Which type of following cement is used for mass concrete work a) High Alumina cement b) Quick setting cement c) Rapid hardening cement d) Low heat cement*
Last Answer : d) Low heat cement*
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 : 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 : 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
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 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 : 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 : Slump test for concrete is carried out, to determine (A) Strength (B) Durability (C) Workability (D) Water content
Last Answer : Answer: Option C
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 maximum percentage of chemical ingredient of cement is that of (A) Magnesium oxide (B) Iron oxide (C) Silica (D) 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 : 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 : 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 : 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 : Slump cone test is used to determine [ A ] Shrinkage of concrete mix [ B ] Creep of concrete [ C ] Workability of concrete mix [ D ] Soundness of concrete
Last Answer : [ C ] Workability of concrete mix
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 : 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 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 : For an ordinary Portland cement (A) Residual does not exceed 10% when sieved through IS Sieve No. 9 (B) Soundness varies from 5 to 10 mm (C) Initial setting time is not less than 30 minutes (D) Compressive stress after 7 days, is not less than 175 kg/cm2
Last Answer : (C) Initial setting time is not less than 30 minutes
Description : Pick up the incorrect statement from the following: (A) The degree of grinding of cement, is called fineness (B) The process of changing cement paste into hard mass, is known as setting of ... (D) The heat generated during chemical reaction of cement with water, is known as heat of hydration
Description : Le-Chatelier's device is used for determining the (A) Setting time of cement (B) Soundness of cement (C) Tensile strength of cement (D) Compressive strength of cement
Description : Soundness of cement is tested by (A) Vicat's apparatus (B) Le-chatelier apparatus (C) Compressive strength testing apparatus (D) None of these
Description : The degree of grinding of cement is called (a) Fineness (b) Soundness (c)Impact value (d) Bulking
Last Answer : (a) Fineness
Description : For rolling mark 60 kg/Sail/X/2010 the first testing in the field after initial testing of rails in rail manufacturing plant, will be done. (i) After test free period of 25%. (ii) After passage of every 40 ... period.* (iii) After passage of 200 GMT. (iv) On the basis of annual GMT of the section.
Last Answer : (ii) After passage of every 40 GMT traffic during test free period.*
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 : 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 : 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 : 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 : 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 : 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