Description : Refractory bricks are used for (A) Retaining walls (B) Columns (C) Piers (D) Combustion chambers
Last Answer : Answer: Option D
Description : Refractory bricks resist (A) High temperature (B) Chemical action (C) Dampness (D) All the above
Last Answer : Answer: Option A
Description : Which of the following bricks are used for lining of furnaces? (A) Over-burnt bricks (B) Under-burnt bricks (C) Refractory bricks (D) First class bricks
Last Answer : Answer: Option C
Description : Sulphuric acid is mixed with ground phosphate rock (to produce phosphoric acid) in a steel digestor lined with (A) Acidic refractory (B) Rubber (C) Karbate (D) Lead or acid proof bricks
Last Answer : (A) Acidic refractory
Description : Sulphuric acid is mixed with ground phosphate rock (to produce phosphoric acid) in a steel digestor lined with (A) Acidic refractory (B) Rubber (C) Karbate (D) Lead or acid-proof bricks
Last Answer : (D) Lead or acid-proof bricks
Description : Fire clay is __________ refractory material. (A) A basic (B) An acidic (C) A neutral (D) Not a
Last Answer : (B) An acidic
Description : Rotary driers are generally made of (A) Cast iron (B) Mild steel (C) High silicon iron (14% Si) (D) Tin lined with refractory bricks
Last Answer : (B) Mild steel
Description : Refractory bricks are usually dried in a __________ dryer. (A) Tray (B) Tunnel (C) Conveyor (D) Festoon
Last Answer : (B) Tunnel
Description : Absorptivity of a perfect black body is unity. Which of the following has maximum absorptivity? (A) Aluminium foil (B) Refractory bricks (C) Iron plate (D) Coke breeze
Last Answer : (D) Coke breeze
Description : Which of the following has the minimum absorptivity? (A) Aluminium foil (B) Coal dust (C) Refractory bricks (D) Iron plates
Last Answer : (A) Aluminium foil
Description : Which of the following is the most widely used heat insulating material for pipelines carrying steam? (A) Tar dolomite bricks followed by asbestos (B) Fireclay refractory followed by aluminium sheet (C) Cotton followed by aluminium foil (D) 85% magnesia cement and glass wool
Last Answer : (D) 85% magnesia cement and glass wool
Description : Large tonnage of refractory bricks are dried in a (A) Shaft furnace (B) Rotary hearth furnace (C) Tunnel kiln (D) Muffle furnace
Last Answer : (C) Tunnel kiln
Description : Pot furnace which is either regenerative or recuperative, is used in the manufacture of (A) Glass (B) Stainless steel (C) Potteries (D) Refractory bricks
Last Answer : (A) Glass
Description : Highly porous refractory bricks are (A) Less susceptible to chemical attack by molten fluxes and gases etc (B) Very strong (C) Having very high thermal conductivity (D) None of these
Last Answer : (D) None of these
Description : Refractory bricks having high thermal conductivity is desirable, when it is to be used in the (A) L.D. converter (B) Blast furnace (C) Rotary kiln (D) Recuperator
Last Answer : (D) Recuperator
Description : Refractory bricks burnt at very high temperature have got (A) Greater resistance to corrosion by slags (B) Less resistance to corrosion by slags (C) High spalling tendency (D) None of these
Last Answer : (A) Greater resistance to corrosion by slags
Description : Test specimen for determination of refractoriness under load (RUL) of a refractory is heated in a (A) Furnace employing neutral atmosphere (B) Carbon resistance furnace (C) Reducing atmosphere (D) Furnace employing negative pressure
Last Answer : (B) Carbon resistance furnace
Description : The refractory lining of the bottom in a basic electric arc furnace is made of (A) Silica (B) Alumina (C) Magnesia (D) Fireclay
Last Answer : Option C
Description : What type of solution has a pH of 7 Acid basic or neutral?
Last Answer : What is the answer ?
Description : Ethereal sulphate is synthesized from the _________ amino acid. (A) Neutral (B) Acidic (C) Basic (D) Sulphur containing
Last Answer : Answer : D
Description : Study the following table and choose the correct option: Salt - Parent Acid - Parent Base - Nature of Salt (a) Soidum Chloride - HCI - NaOH - Basic (b) Sodium Carbonate - H2CO3 - NaOH - Neutral (c) Sodium Sulphate - H2SO4 - NaOH - Acidic (d) Sodium Acetate - CH3COOH - NaOH - Basic
Last Answer : Answer: (d) Sodium Acetate - CH3COOH - NaOH - Basic
Description : Metallic oxides which react with both acid and base to produce salt and water are called A) Neutral Oxides B) Basic Oxides C) Amphoteric Oxides D) Acidic Oxides
Last Answer : C) Amphoteric Oxides
Description : Pick up the metal refractory from the following: (A) Molybdenum (B) Tungsten (C) Zirconium (D) All of these
Description : Sewer pipes are made of (A) Earthen ware (B) Stone ware (C) Refractory clay (D) All the above
Last Answer : Answer: Option B
Description : The sequence of refractory materials according to increasing melting points is: (A) Dolomite, Magnesia, Bauxite, Chromites (B) Bauxite, Chromites, Dolomite, Magnesia (C) Magnesia, Bauxite, Dolomite, Chromites (D) None of these
Description : Pick up the correct statement from the following: (A) The baked earth is called terra-cotta (B) The articles prepared from clay which is burnt at low temperature and cooled down slowly, are called ... clays which as mixed with stone and crushed pottery, are called stone ware (D) All the above
Description : In ideal pavement is constructed with (A) Bricks (B) Hard soil (C) Portland cement concrete (D) Tar
Description : Pick up the correct statement from the following: (A) Bricks are paid per thousand (B) Cement is paid per 50 kg bag (C) Lime is paid per quintal (D) All the above
Last Answer : (D) All the above
Description : According to Indian Standards Institute, the actual size of modular bricks is (A) 23 cm × 11.5 cm × 7.5 cm (B) 25 cm × 13 cm × 7.5 cm (C) 19 cm × 9 cm × 9 cm (D) 20 cm × 10 cm × 10 cm
Last Answer : (C) 19 cm × 9 cm × 9 cm
Description : Pick up the correct statement from the following: (A) Sand stones may be divided into calcareous, siliceous and ferruginous sand stones (B) Concrete using sand stones, cracks due to excessive shrinkage (C) Broken bricks produce a concrete having good fire resisting qualities (D) All the above
Description : For making fly-ash building bricks, the following mix of fly-ash, sand and lime, is (A) 80 : 13 : 7 (B) 70 : 20 : 10 (C) 60 : 35 : 5 (D) None of these
Description : The size of modular bricks, is (A) 10 × 10 × 9 cm (B) 19 × 9 × 9 cm (C) 22.5 × 10 × 8.5 cm (D) 22.5 × 8.0 × 9 cm
Description : The clay to be used for manufacturing bricks for a large project, is dugout and allowed to weather throughout (A) The monsoon (B) The winter (C) The summer (D) None of these
Description : The presence of sand in brick earth prevents: (A) Cracking of bricks (B) Shrinkage of bricks (C) Warping of bricks (D) None of these
Description : Pick up the correct statement from the following: (A) The percentage of absorption for firebricks varies from 5 to 10 (B) The percentage of silica in silica bricks is to the extent of about 95 to 97 ... to 2 percent of lime in silica bricks is added to act as binding material (D) All the above
Description : Pick up the correct statement from the following: (A) The average crushing strength of hand moulded bricks is 6000 t/m2 (B) The average tensile strength of hand moulded brick is 200 t/m2 (C) The average shearing strength of hand moulded brick is 600 t/m2 (D) All the above
Description : The size of mould for bricks, is generally kept (A) A little large to specified size (B) A little small to specified size (C) Equal to specified size (D) 10% larger than specified size
Description : Jhumb bricks are (A) Under burnt (B) Over burnt (C) Kutcha (D) None of these
Description : The minimum compressive strength of 1st class bricks should be (A) 75 kg/cm2 (B) 90 kg/cm2 (C) 100 kg/cm2 (D) 120 kg/cm2
Description : The standard size of masonry bricks, is (A) 18 cm × 8 cm × 8 cm (B) 19 cm × 9 cm × 9 cm (C) 20 cm × 10 cm × 10 cm (D) 21 cm × 11 cm × 11 cm
Description : Second class bricks (A) Are of dark brown colour (B) Produce a metallic sound when struck (C) Are well burnt (D) Are under burnt
Description : The silica is used for preparing (A) Silica bricks (B) Coke oven (C) Lining for glass furnaces (D) All of these
Description : For one cubic metre of brick masonry, number of bricks required, is (A) 400 (B) 425 (C) 450 (D) 500
Description : Excess of silica in brick earth results in (A) Cracking and warping of bricks (B) Loss of cohesion (C) Enhancing the impermeability of bricks (D) None of the above
Description : Pug mill is used for (A) Preparation of clay (B) Moulding of clay (C) Drying of bricks (D) Burning of bricks
Description : Minimum thickness of wall where single Flemish bond can be used is (A) Half brick thick (B) One brick thick (C) One and a half bricks thick (D) Two bricks thick
Description : The minimum compressive strength of 2nd class bricks should be (A) 75 kg/cm2 (B) 90 kg/cm2 (C) 100 kg/cm2 (D) 120 kg/cm
Description : A queen closer is a (A) Brick laid with its length parallel to the face or direction of wall (B) Brick laid with its breadth parallel to the face or direction of wall (C) Brick having the same ... bricks but half the breadth (D) Brick with half the width at one end and full width at the other
Description : Number of bricks required for one cubic metre of brick masonry is (A) 400 (B) 450 (C) 500 (D) 550
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