Chemical Engineering Basics MCQ Solved Paper for SBI Clerk

1. Cemented carbide tools are not suitable for cutting
A. Aluminium
B. Brass
C. Cast iron
D. Steel
Answer : A

2. Increasing the carbon content of steel
A. Reduces the upper shelf energy
B. Increasing the ductility transition temperature
C. Decreases brittleness
D. Decreases hardness
Answer : B

3. Euler number is defined as the ratio of inertia force to __________ force.
A. Pressure
B. Elastic
C. Gravity
D. Viscous
Answer : A

4. Which of the following is the correct nature of shear stress distribution along the cross section in a horizontal circular pipe under steady state fluid flow condition?
A.
B.
C.
D.
Answer : C

5. Pick out the wrong statement.
A. Ductile fracture of a stressed material, which exhibits a large plastic deformation is commonly caused by the formation and coalescence of voids in the necked region
B. Brittle fracture is caused by the propagation of pre-existing cracks in the material and involves minimum plastic deformation
C. Fatigue fracture of a material is always brittle in nature and takes place due to the existence of line imperfections
D. Brittle materials are generally tested in tension
Answer : B

6. Which of the following metals cannot be hot worked at room temperature?
A. Zinc
B. Nickel
C. Lead
D. Tin
Answer : B

7. Heat release during phase change is observed in case of a/an
A. Boiler
B. Condenser
C. Evaporator
D. All (A), (B) & (C)
Answer : B

8. With increase in compression ratio, the volumetric efficiency of air compressor
A. Increases
B. Decreases
C. Remain same
D. May increase or decrease (depends on the suction pressure)
Answer : A

9. When an isolated thermodynamic system executes a process,
A. Work is done
B. Heat transfer takes place
C. Mass flow occurs across the boundary of the system
D. No chemical reaction takes place within the system
Answer : D

10. Out of the following, the best material capable of withstanding shock & vibration without the danger of cracking is
A. Malleable iron
B. Grey cast iron
C. Chilled cast iron
D. White cast iron
Answer : A

11. __________ iron is produced by the annealing of white cast iron.
A. Malleable
B. Nodular
C. Ductile
D. Grey
Answer : A

12. Calorific value of __________ are almost same.
A. Lignite & anthracite coal
B. Lignite & coal gas
C. Petrol & diesel
D. Coal gas & natural gas
Answer : C

13. A cylindrical rod subjected to a tensile strain within the elastic limit undergoes a volume change. If the volume strain is equal to half the tensile strain, then the Poisson's ratio of the rod is
A. 0
B. 0.33
C. 0.44
D. 0.25
Answer : C

14. Boiler draught of 10 mm water column is equivalent to
A. 1 kgf/m²
B. 10 kgf/m²
C. 10 kgf/mm²
D. 1 kgf/mm²
Answer : B

15. Eutectic reaction for iron-carbon system occurs at a temperature of __________ °C.
A. 723
B. 959
C. 1147
D. 1493
Answer : A

16. Diffusion co-efficient of a metal in a solid solution depends upon its
A. Composition
B. Temperature
C. Both (A) & (B)
D. Neither (A) nor (B)
Answer : C

17. In __________ process, there is an increase in entropy with no degradation of energy.
A. Isothermal expansion
B. Isochoric heat addition
C. Polytropic expansion
D. Isobaric heat addition
Answer : A

18. Exposure to __________ accelerates the degradation of plastics.
A. Ultraviolet radiation
B. High atmospheric temperature
C. High ambient temperature
D. Damp atmosphere
Answer : A

19. Between 230 and 370°C, blue brittleness is caused in mild steel because of the
A. Immobility of dislocation
B. Strain-ageing
C. Increase in Young's modulus
D. Strain hardening
Answer : B

20. Fahrenheit and Centigrade scales have the same readings at
A. -55°
B. -40°
C. -33°
D. -58°
Answer : B

21. Superheating of steam is done at constant
A. Enthalpy
B. Entropy
C. Pressure
D. Volume
Answer : C

22. Plants produce carbohydrates from the CO2 present in the atmosphere by
A. Polymerisation
B. Photochemical reaction
C. Oxidation
D. None of these
Answer : B

23. Laser welding is widely employed in the __________ industries.
A. Electronic
B. Structural
C. Process
D. Heavy
Answer : A

24. An abrupt and sudden fall in the reading of barometer is an indication of the
A. Storm
B. Rain
C. Clear weather
D. Cold wave
Answer : A

25. Most important property of steels for use in automobile bodies is the
A. Formability
B. Yield strength
C. Toughness
D. Resilience
Answer : A

26. Optical activity is a/an __________ property.
A. Additive
B. Constitutive
C. Both (A) & (B)
D. Neither (A) nor (B)
Answer : C

27. In the Bayer's process, bauxite is digested under pressure using
A. H₂SO₄
B. NaOH
C. NH₃
D. HCl
Answer : B

28. Resilience of a bolt can be increased by increasing its
A. Length
B. Shank diameter
C. Head diameter
D. None of these
Answer : A

29. In an eutectic system, two elements are completely
A. Soluble in solid state
B. Insoluble in liquid state
C. Insoluble in both solid & liquid state
D. Soluble in liquid state
Answer : D

30. Bad odour in sanitary latrines is reduced by periodically sprinkling
A. Bleaching powder
B. Lime powder
C. Aluminium sulphate
D. None of these
Answer : B

31. Addition of silicon to cast iron
A. Promotes graphite module formation
B. Improves its ductility
C. Does not promote graphite flakes formation
D. Increases the fluidity of molten metal
Answer : D

32. Steel produced from phosphatic iron is __________ in nature.
A. Malleable
B. Ductile
C. Brittle
D. Tough
Answer : C

33. __________ metal is used as a bearing liner material.
A. Pewter
B. White
C. Babbitt
D. Gun
Answer : C

34. __________ is used as a material of construction for the blade of power saw.
A. Wrought iron
B. Stainless steel
C. Mild steel
D. High speed steel
Answer : D

35. The activity of pure hydrogen gas at 1000°C and 5 atm pressure
A. Is always less than 1
B. Is always greater than 1
C. Can be 5
D. Depends on the choice of the standard state
Answer : D

36. __________ cannot increase the fatigue strength of a material.
A. Grain refining
B. Grain coarsening
C. Surface hardening
D. Shot peening
Answer : B

37. Steel & cast iron pipes are produced by __________ casting.
A. Slush
B. Die
C. Investment
D. True centrifugal
Answer : D

38. Highest cutting speed is achieved by the __________ tool material.
A. High speed steel
B. Carbide
C. Cast alloy
D. Plain carbon steel
Answer : B

39. When the wavelength of incident X-rays increases, the angle of diffraction
A. Decreases
B. Increases
C. Remain constant
D. Shows no systematic variation
Answer : A

40. The dew point temperature lines on psychrometric charts are straight inclined sloping downwards to the right. When relative humidity of moist air is 100%, then
A. Wet bulb temperature=dry bulb temperature
B. Wet bulb temperature=dew point temperature
C. Saturation temperature=dew point temperature
D. All 'a', 'b' & 'c'
Answer : D

41. A compact estimate about the amount of materials handling between various work stations is obtained from the
A. Gantt chart
B. Bin chart
C. String diagram
D. Travel chart
Answer : D

42. Hot extrusion of aluminium is done in the temperature range of __________ °C.
A. 550-600
B. 450-500
C. 350-400
D. 250-300
Answer : C

43. The cathode in an electrochemical cell always carries
A. Negative charge
B. Positive charge
C. Zero charge
D. Positive or negative charge depending upon the nature of the cell
Answer : A

44. Powder metallurgy is used to produce
A. High precision components with complex cavities and sharp features
B. Components of large size
C. Porosity free components
D. Components of such alloys whose constituents do not form alloys readily
Answer : C

45. The dimensional formula of bulk modulus of elasticity is same as that of the
A. Pressure
B. Density
C. Force
D. None of these
Answer : A

46. Encyclopaedia of Chemical Technology has been
A. Authored by Kirk Othmer
B. Edited by Perry and Chilton
C. Edited by Kirk Othmer
D. Authored by Perry and Chilton
Answer : C

47. Maximum permissible sulphur content in steel is __________ percent.
A. 0.015
B. 0.055
C. 0.505
D. 0.805
Answer : A

48. A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material?
A. Steel
B. Glass
C. Rubber
D. Brass
Answer : A

49. Shaft/rotor speed is most accurately measured by a
A. Frequency counter
B. Tachometer
C. Strobometer
D. Speedometer
Answer : C

50. __________ glass is used in the mercury in glass thermometer meant for measuring a temperature of 500°C.
A. Borosilicate
B. High silica
C. Supermax
D. Lead
Answer : C