Sail E0 Webinar

MCQs

Total Questions : 515 | Page 6 of 52 pages
Question 51. Dolomite bricks have good resistance to attack by
  1.    molten steel
  2.    iron oxide
  3.    lime slag
  4.    none of these
 Discuss Question
Answer: Option A. -> molten steel
Answer: (a).molten steel
Question 52. Ceramic recuperators used for waste heat recovery from high temperature flue gas going out of the furnace is made of
  1.    fireclay
  2.    silicon carbide
  3.    corrundum
  4.    siliceous fireclay
 Discuss Question
Answer: Option B. -> silicon carbide
Answer: (b).silicon carbide
Question 53. Which form of silica has the highest specific gravity ?
  1.    Quartz
  2.    Cristobalite
  3.    Tridymite
  4.    All have the same specific gravity
 Discuss Question
Answer: Option A. -> Quartz
Answer: (a).Quartz
Question 54. __________ is the measure of the strength of refractory under the combined effect of temperature & load.
  1.    Porosity
  2.    RUL
  3.    Specific gravity
  4.    Thermal conductivity
 Discuss Question
Answer: Option B. -> RUL
Answer: (b).RUL
Question 55. Bottom of basic open hearth furnace are constructed of
  1.    dead burnt magnesite ramming mass.
  2.    porous fireclay bricks.
  3.    semi-silica bricks.
  4.    silicon carbide bricks.
 Discuss Question
Answer: Option A. -> dead burnt magnesite ramming mass.
Answer: (a).dead burnt magnesite ramming mass.
Question 56. Firing of refractory brick is done to
  1.    dehydrate the dried refractory.
  2.    develop stable mineral forms in them.
  3.    form ceramic bonds necessary for development of high crushing strength in the finished product.
  4.    all (a), (b) and (c).
 Discuss Question
Answer: Option D. -> all (a), (b) and (c).
Answer: (d).all (a), (b) and (c).
Question 57. Panel test determines the __________ of refractories.
  1.    fusion point
  2.    spalling resistance
  3.    slag penetration resistance
  4.    refractoriness under load (RUL)
 Discuss Question
Answer: Option B. -> spalling resistance
Answer: (b).spalling resistance
Question 58. Fireclay bricks are not used in the
  1.    beehive coke oven.
  2.    by-product coke oven walls.
  3.    combustion chamber of B.F. stoves.
  4.    coke oven regenerators.
 Discuss Question
Answer: Option B. -> by-product coke oven walls.
Answer: (b).by-product coke oven walls.
Question 59. Chemically, mullite refractories is
  1.    3Al₂O₃.2SiO₂
  2.    Al₂O₃
  3.    ZrSO₄
  4.    ThO₂
 Discuss Question
Answer: Option A. -> 3Al₂O₃.2SiO₂
Answer: (a).3Al₂O₃.2SiO₂
Question 60. Fusion point of a basic refractory material is
  1.    reduced by the addition of acid oxides.
  2.    increased by the addition of acid oxides.
  3.    not affected by the addition of acid oxides.
  4.    always less than 1000°C.
 Discuss Question
Answer: Option A. -> reduced by the addition of acid oxides.
Answer: (a).reduced by the addition of acid oxides.

Latest Videos
Chapter 1 - GLOBAL STEEL SCENARIO & INDIAN STEEL INDUSTRY Part 1 : (13-04-2024) INDUSTRY AND COMPANY AWARENESS (ICA)
Direction Sense Test Part 1 Reasoning (Hindi)
Chapter 1 - RMHP / OHP / OB & BP Part 1 : (14-02-2024) GPOE
Cube & Cuboid Part 1 Reasoning (Hindi)
Data Interpretation (DI) Basic Concept Reasoning (Hindi)
Counting Figures Part 1 Counting Of Straight Lines Reasoning (Hindi)
Sail E0 free webinar Webinars
Real Numbers Part 7 Class 10 Maths
Real Numbers Part 1 Class 10 Maths
Polynomials Part 1 Class 10 Maths

Latest Test Papers

DSP Combined 1 Free Revision Test SAIL JO E-0
GPOE / GPA Combined 1 Free Revision Test SAIL JO E-0
BSP Plant Specific Review Test SAIL JO E-0
BSL Combined 1 Free Revision Test SAIL JO E-0
GFM Combined 1 Free Revision Test SAIL JO E-0