Fuels MCQ

Test your knowledge with important Fuels MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Fuels MCQs at Bissoy

• What is chemical formula of chromite
  ক

  FeCr₂O₄

  খ

  MgCO₃

  গ

  CaCO₃

  ঘ

  3Al₂O₃.2SiO₂
• With increase in the porosity, thermal spalling resistance of fireclay brick
  ক

  increases

  খ

  decreases

  গ

  remains same

  ঘ

  may increase or decrease
• Which of the following furnace is used for iron making
  ক

  LD furnace

  খ

  Electric Arc Furnace

  গ

  Open heath furnace

  ঘ

  Blast furnace
• M₁₀ index of coke indicates.
  ক

  Compressive strength

  খ

  hardness

  গ

  abrasion resistance

  ঘ

  impact stregth
• Which of the following constituents of coal is the most important in the production of coke?
  ক

  ash

  খ

  moisture

  গ

  Volatiles

  ঘ

  carbon
• Which of the following refractory materials is not used in the BOF (LD) working lining?
  ক

  Tar bonded dolomite

  খ

  Pitch bonded magnesite

  গ

  Fired and pitch impregnated magnesite

  ঘ

  Graphite-alumina composite
• Low temperature carbonization
  ক

  produces higher quantity of gas than high temperature carbonization

  খ

  is mainly for producing the smokeless domestic coke

  গ

  produces less quantity of tar than high temperature carbonization

  ঘ

  is meant for the production of 'metallurgical coke'
• The refractory brick which has good thermal shock resistance at high temnperature but cracks on cooling below 400°C is
  ক

  magnesite

  খ

  chrome

  গ

  silica

  ঘ

  fireclay
• The example of regenerative furnace is/are
  ক

  Coke oven furnace

  খ

  Open heath furnace

  গ

  Socking pit

  ঘ

  Both A and B
• The Rotary kiln furnace is used for
  ক

  Flux making

  খ

  Sinter making

  গ

  Conventional route of iron making

  ঘ

  Alternative routes of iron making
• Basic oxygen furnace is used for
  ক

  Iron making

  খ

  Degassing of diatomic gasses

  গ

  Desulphurization of steel

  ঘ

  None of these
• Flue gas discharge velocity through chimney of a big thermal power plant may be around . . . . . . . . m/sec.
  ক

  0.5

  খ

  10

  গ

  500

  ঘ

  50
• Improper storage condition results in the weathering of coal and spontaneous combustion, which increases its
  ক

  friability & oxygen content

  খ

  caking index

  গ

  yield of carbonized products

  ঘ

  calorific value
• Proximate analysis of coal determines its . . . . . . . . content.
  ক

  moisture, volatile matter, ash & fixed carbon

  খ

  moisture, ash, sulphur & volatile matter

  গ

  moisture, sulphur, nitrogen & fixed carbon

  ঘ

  none of these
• Thorium, zirconium, platinum, nickel, iron, molybdenum, tungsten are the . . . . . . . .
  ক

  Acidic refractories

  খ

  Basic refractories

  গ

  Neutral refractories

  ঘ

  None of these
• Softening temperature of coal ash is a measure of the . . . . . . . . of coal.
  ক

  clinkering tendency

  খ

  caking tendency

  গ

  coking tendency

  ঘ

  size stability
• Size of blast furnace grade coke is . . . . . . . . mm.
  ক

  15 - 25

  খ

  5 - 16

  গ

  10 - 15

  ঘ

  25 - 80
• Natural gas is essentially
  ক

  methane

  খ

  propane + butane

  গ

  30% CO + 15% H₂ + 45% N₂

  ঘ

  50% methane 50% H₂
• The internal energy of the combustion products is . . . . . . . . compared to that of reactants.
  ক

  more or less; (depends on the state of fuel)

  খ

  more

  গ

  less

  ঘ

  same
• Those refractories which are neither attacked acid slag nor by basic slags are called
  ক

  Basic refractories

  খ

  Acidic refractories

  গ

  Neutral refractories

  ঘ

  None of these
• Which type of fuel is used to heat the Blast furnace stove
  ক

  Blast furnace gas

  খ

  Mixed gas

  গ

  Electrical energy

  ঘ

  Both A and B
• Arrange the following refractory materials in ascending order of their melting points.<br>P. Alumina<br>Q. Silica<br>R. Carbon<br>S. Zirconia
  ক

  R &gt; P &gt; Q &gt; S

  খ

  S &gt; R &gt; Q &gt; P

  গ

  R &gt; S &gt; P &gt; Q

  ঘ

  P &gt; S &gt; R &gt; Q
• Fixed carbon in coal is defined as
  ক

  that present in volatile matters

  খ

  the total quantity of carbon present in ash

  গ

  hundred minus the percentage of volatile matter ash &amp; moisture

  ঘ

  the one which is present in the residue after ash formed
• Pick up correct statement about Bessemer converter
  ক

  It is an oldest process of steel making

  খ

  It is a converter used to make steel

  গ

  Air is supplied to converter to oxidize the impurities

  ঘ

  All are correct
• Which of the following is /are neutral refractories
  ক

  Dolomite refractory

  খ

  Silica refractory

  গ

  Carbon block refractory

  ঘ

  None of these
• The fusion temperature of Chromite brick is
  ক

  3050°C

  খ

  1780°C

  গ

  1900°C

  ঘ

  2050°C
• Refractories are materials which
  ক

  withstand high temperature

  খ

  Don't fuse at high temperature

  গ

  High thermal resistivity

  ঘ

  All are correct
• Hot gases from a furnace are entering at the base of a 30m high tubular vertical chimney at 600°C. The density of air and furnace gases at respective temperatures are 1.165 and 0.405 kgm^-3 respectively. The static draft produced by the chimney is . . . . . . . . Pa.
  ক

  2.3

  খ

  22.8

  গ

  223.6

  ঘ

  2193.3
• The mini blast furnace is used for
  ক

  Conventional route of iron making

  খ

  Flux making

  গ

  Making iron from inferior quality of ore

  ঘ

  Both B and C
• Which is the correct option for highest and lowest grade of coal among given combination
  ক

  lignite-Peat

  খ

  Bituminous-lignite

  গ

  Anthracite-Peat

  ঘ

  Anthracite-Bituminous