Description : Seasoning of timber is essential to remove (A) Knots from timber (B) Sap from timber (C) Twisted fibre from timber (D) Roughness of timber
Last Answer : Answer: Option B
Description : How do I clean my iron cast grill pan without removing the seasoning?
Last Answer : Wipe it with Kitchen paper.
Description : The fluid generally used for grouting is (A) Cement and water mix (B) Clay suspension (C) Sodium silicate (D) All the above
Last Answer : (D) All the above
Description : The most commonly used admixture which prolongs the setting and hardening time is (A) Gypsum (B) Calcium chloride (C) Sodium silicate (D) All of the above
Last Answer : (A) Gypsum
Description : How do you reduce the loss that is produced when light strikes a flat polished end of a fiber optic? A. By painting the surface B. By inclining the surface C. By cooling D. By application of antireflection coating
Last Answer : D. By application of antireflection coating
Description : The preparation of surface of stone to obtain plain edges or to obtain stones of required size and shape is known as (A) Quarrying of stones (B) Blasting of stones (C) Seasoning of stones (D) Dressing of stones
Last Answer : Answer: Option D
Description : Seasoning of timber is done for (A) Increasing moisture content (B) Decreasing moisture content (C) Increasing strength of timber (D) None to these
Description : Seasoning of timber is done (A) To make it water proof (B) To paint its surface (C) To increase its temperature (D) To remove water
Description : Softening of hard water is done using sodium aluminium silicate (zeolite) . This causes
Last Answer : Softening of hard water is done using sodium aluminium silicate (zeolite) . This causes A. adsorption of `Ca^(2 ... both (A) and (B) D. none of these
Description : In milk chilling plant, the usual secondary refrigerant is (a)ammonia (b)sodium silicate (c) glycol (d) brine
Last Answer : Ans: d
Description : The chemical name of quartz is (a) Calcium oxide (b) Calcium phosphate (c) Sodium phosphate (d) Sodium silicate
Last Answer : Ans:(d)
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 : The most common filter aid is (A) Diatomaceous earth (B) Calcium silicate (C) Sodium carbonate (D) Silica gel
Last Answer : (A) Diatomaceous earth
Description : Which of the following is not used as a surface active agent in a flocculation operation? (A) Sodium silicate (B) Quartz (C) Lime (D) Alumina
Last Answer : (B) Quartz
Description : Mixture of sodium silicate and calcium silicate is called
Last Answer : glass.
Description : Sodium tri poly phosphate (STPP) is manufactured by reaction of phosphoric acid with sodium (A) Carbonate (B) Phosphate (C) Bicarbonate (D) Silicate
Last Answer : (A) Carbonat
Description : Main constituents of Portland cement are calcium aluminate and (A) Gypsum (B) Silicates (C) Sodium silicate (D) Carbonates
Last Answer : (B) Silicates
Description : Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc? (A) Sodium silicate (B) Sodium borate (C) Sodium tripolyphosphate (STPP) (D) Caustic soda
Last Answer : (B) Sodium borate
Description : Sand and __________ is fused at 1300°C, to produce sodium silicate. (A) Limestone (B) Soda ash (C) Coke (D) Sodium sulphate
Last Answer : (B) Soda ash
Description : Crucible is repaired by? (i) Magnasite Powder (ii) Magnasite Powder & Sodium Silicate.* (iii) Sodium Silicate (iv) Aluminium powder
Last Answer : (ii) Magnasite Powder & Sodium Silicate.*
Description : The chemical name of quartz is (1) Calcium oxide (2) Calcium phosphate (3) Sodium phosphate (4) Sodium silicate
Last Answer : Sodium silicate
Description : Quartz is made of (1) Calcium Sulphate (2) Calcium Silicate (3) Sodium Sulphate (4) Sodium Silicate
Last Answer : Sodium 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
Description : Pick up the incorrect statement from the following: (A) Tricalcium silicate (C3S) hydrates rapidly (B) Tricalcium silicate (C3S) generates more heat of hydration (C) Tricalcium silicate (C3S) develops early strength (D) Tricalcium silicate (C3S) has more resistance to sulphate attack
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 : The fire clay contains pure (A) Lime (B) Oxide of iron (C) Hydrated aluminium silicate (D) Magnesium
Last Answer : Answer: Option C
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
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
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 : Which of the following cements contains maximum percentage of dicalcium silicate? (A) Ordinary Portland cement (B) Low heat cement (C) Rapid hardening cement (D) Sulphate resisting cement
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 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 : 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 : The sum of the percentage of tricalcium silicate and dicalcium silicate for Portland cement varies from. (a) 50 to 60% (b) 60 to 70% (c) 70 to 80% (d) 80 to 90%
Last Answer : (c) 70 to 80%
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 : High percentage of tricalcium silicate and low percentage of dicalcium silicate in cement results in. (a) Rapid hardening (b) High early strength (c) High heat of generation (d) All the above
Last Answer : (d) All the above
Description : The presence of dicalcium silicate in cement. (a) Hydrates the cement slowly. (b) Generates less heat of hydration. (c) Has more resistance to sulphate attack. (d) All of these
Description : The presence of tricalcium silicate in cement (a) Hydrates the cement rapidly (b) Generates less heat of hydration. (c) Offer high resistance to sulphate attack (d) All of these
Last Answer : (a) Hydrates the cement rapidly
Description : Dicalcium silicate (C2S) [ A ] rates rapidly [ B ] Hardens rapidly [ C ] Generates less heat of hydration [ D ] Has less resistance to sulphate attack
Last Answer : [ C ] Generates less heat of hydration