Metallurgical Engineering MCQ

Test your knowledge with important Metallurgical Engineering MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30+ more Metallurgical Engineering MCQs on Bissoy. Bissoy App

• Heavy water (D2O) in a nuclear reactor serves as a
  ক

  coolant

  খ

  moderator

  গ

  both A & B

  ঘ

  neutron absorber
• Nusselt number/Biot number varies
  ক

  inversely with thermal conductivity

  খ

  directly with heat transfer co-efficient

  গ

  directly with thermal conductivity

  ঘ

  inversely with dimension of the solid
• The ratio of the shear stress to the principal stress on a principal plane is
  ক

  0

  খ

  1

  গ

  $$\frac{1}{2}$$

  ঘ

  $$\frac{1}{3}$$
• Reynolds number is the ratio of
  ক

  inertia forces to viscous forces

  খ

  inertia forces to buoyancy forces

  গ

  viscous forces to buoyancy forces

  ঘ

  viscous forces to surface tension
• A thermally thin body is the one for which
  ক

  Biot number is less than 0.1

  খ

  Galileo number is less than 0.1

  গ

  Fourier number is less than 0.1

  ঘ

  Fourier number is greater than 0.1
• The majority charge carriers in p-type silicon are
  ক

  Free electrons

  খ

  ions

  গ

  conduction electrons

  ঘ

  holes
• 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 constituents of coal is the most important in the production of coke?
  ক

  ash

  খ

  moisture

  গ

  Volatiles

  ঘ

  carbon
• 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
• 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 & moisture

  ঘ

  the one which is present in the residue after ash formed
• Main constituents of benzol are
  ক

  benzene, toluene & xylene

  খ

  tar & creosote

  গ

  anthracene & phenol

  ঘ

  ammonia & phenol
• L.D. Converters are generally lined with
  ক

  magnesite

  খ

  fireclay

  গ

  chrome magnesite

  ঘ

  silica
• Percentage of methane in coke oven gas may be around
  ক

  5

  খ

  25

  গ

  15

  ঘ

  35
• Presence of free moisture in coal during its high temperature carbonisation
  ক

  protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot oven walls

  খ

  reduces the coking time

  গ

  increases the loss of fine coal dust from the ovens when charging

  ঘ

  none of these
• Bond crushing law
  ক

  calls for relatively less energy for the smaller product particles than does the Rittinger's law

  খ

  is less realistic in estimating the power requirements of commercial crushers

  গ

  states that the work required to form particle of any size from very large feed is proportional to the square root of the volume to surface ratio of the product

  ঘ

  states that the work required for the crushing is proportional to the new surface created
• Electrical energy consumed by a jaw crusher is not a function of the
  ক

  average feed size

  খ

  average product size

  গ

  machine capacity

  ঘ

  none of these
• Screw conveyors are
  ক

  run at very high rpm

  খ

  suitable for sticky materials

  গ

  suitable tor highly abrasive materials

  ঘ

  all A, B and C
• Fibrous material is broken by a
  ক

  roll crusher

  খ

  squirrel-cage disintegrator

  গ

  ball mill

  ঘ

  none of these
• Which of the following parts of a jaw crusher is subjected to maximum wear and tear during its operation?
  ক

  check plates

  খ

  jaw plates

  গ

  toggles

  ঘ

  crush shaft
• The material is crushed in a gyratory crusher by the action of
  ক

  impact

  খ

  compression

  গ

  attrition

  ঘ

  cutting
• The activity co-efficient of the solute in a dilute solution
  ক

  decreases with increase of concentration of the solute

  খ

  increases with increase of concentration of the solute

  গ

  remains constant

  ঘ

  is unity at infinite dilution
• For a spontaneous natural process at constant temperature and pressure, the free energy of the system always
  ক

  increases

  খ

  decreases

  গ

  remains constant

  ঘ

  increases to a maximum before decreasing
• At absolute zero temperature, for any reaction involving condensed phases
  ক

  ΔG° = 0, ΔH° = 0

  খ

  ΔH° = 0, ΔS° = 0

  গ

  ΔS° = 0, ΔE° = 0

  ঘ

  ΔS° = 0, ΔC_P° = 0
• The tensile load-elongation curve of a metal does not describe
  ক

  work hardening

  খ

  yield stress

  গ

  anisotropy index

  ঘ

  necking strain
• A pipeline buried in soil is commonly protected from corrosion by
  ক

  anodic protection

  খ

  cathodic protection

  গ

  using inhibitors

  ঘ

  using a special alloy resistant to corrosion
• The cathode in an electrochemical cell always carries
  ক

  negative charge

  খ

  positive charge

  গ

  zero charge

  ঘ

  positive or negative charge depending upon the nature of the cell
• Which of the following is a moderating material used in nuclear reactor?
  ক

  graphite

  খ

  cadmium

  গ

  zircalloy (an alloy of zirconium and aluminium)

  ঘ

  stainless steel
• Molten sodium (as a coolant in fast breeder reactor)
  ক

  can't attain high temperature at normal pressure

  খ

  is not at all corrosive even at a higher temperature

  গ

  is highly radioactive at elevated temperature & can cause explosion when it comes in contact with air or water

  ঘ

  none of these
• The radioactive isotope of hydrogen is
  ক

  deuterium

  খ

  tritium

  গ

  protium

  ঘ

  none of these
• What is the average life of a radioactive atom having a 'half life period' of T?
  ক

  1.44T

  খ

  0.144T

  গ

  14.4T

  ঘ

  2T