Chemical Engineering Basics 1000+ MCQ with answer for IBPS SO

1. The most serious manufacturing defect from fracture toughness point of view is
A. Surface roughness
B. Pores
C. Spherical inclusion
D. Crack
Answer : D

2. Percentage of argon (by volume) in dry atmospheric air is about
A. 0.09
B. 0.3
C. 0.57
D. 0.94
Answer : D

3. The noble metals
A. Are exemplified by Na, K and Li
B. Do not resist corrosion very strongly
C. Are the lowermost in the electro-chemical series of metals
D. None of these
Answer : C

4. The life of a ball bearing is inversely proportional to
A. (Load)¹
B. (Load)²
C. (Load)³
D. (Load)^0.33
Answer : C

5. Cascade control is
A. The continuous adjustment of the set point index of an automatic control loop by a primary (master) controller
B. Used when changes in process conditions cause serious upsets in the controlled variable
C. Useful to control flow from temperature
D. All 'a', 'b' & 'c'
Answer : D

6. In inventory control theory, the economic order quantity (EOQ) is the
A. Lot size corresponding to break even analysis
B. Average level of inventory
C. Optimum lot size
D. None of these
Answer : C

7. In the formation of cermets, the ratio of ceramic material to metallic material is usually 80:20. Which of the following is a cermet?
A. Zirconia
B. Alumina
C. Bakelite
D. Tungsten carbide
Answer : D

8. Sub zero treatment of steel is done to
A. Suppress martensite transformation
B. Enhance its working performance in sub zero atmosphere
C. Reduce the retained austenite in hardened steel
D. Induce temper brittleness after its hardening
Answer : C

9. Minimum safe distance between two liquid fuel storage tanks is equal to (where, H = height of the tank)
A. H
B. H/2
C. H/4
D. H/6
Answer : D

10. Babbitt lining is used on brass/bronze bearings to increase the
A. Antifriction properties
B. Compressive strength
C. Bearing resistance
D. Wear resistance
Answer : D

11. Which one is neutral in character?
A. N₂O₄
B. N₂O
C. N₂O₅
D. N₂O₃
Answer : B

12. The dew point of moist air becomes __________ with decrease in its relative humidity.
A. Less than the wet bulb temperature
B. More than the wet bulb temperature
C. More than the dry bulb temperature
D. Equal to wet bulb temperature
Answer : A

13. Nickel is a __________ material.
A. Ferromagnetic
B. Semi-conductor
C. Paramagnetic
D. Ferroelectric
Answer : A

14. Boiling point of water gets lowered at high altitudes (e.g., hills), because
A. Temperature is low
B. Atmospheric pressure is low
C. Atmospheric pressure is high
D. None of these
Answer : B

15. Which of the following represents the correct time-temperature curve when a block of metal is heated above room temperature & then left to cool in the room following Newton's law of cooling in which the rate of temperature drop will go on decreasing with the passage of time.
A.
B.
C.
D.
Answer : C

16. In case of brasses, with decreasing zinc percentage and increasing copper percentage, its __________ increases.
A. Percentage elongation
B. Brinell hardness
C. Tensile strength
D. All 'a', 'b' & 'c'
Answer : A

17. Which of the following is the most wear resistant grade of carbide used for the cutting tools?
A. Aluminium carbide
B. Tungsten carbide
C. Nickel carbide
D. Iron carbide
Answer : B

18. __________ joint is mostly used for joining pipes carrying water at low pressure.
A. Nipple
B. Socket
C. Union
D. Bell and spigot
Answer : B

19. Absolute zero pressure can be attained at a temperature of
A. 0°C
B. 50°K
C. 0°R
D. None of these
Answer : C

20. Vernier calipers cannot be used to measure the
A. I.D. & O.D. of the shaft
B. Thickness of parts
C. Depth of holes
D. Clearance between two mating surfaces
Answer : D

21. 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

22. Normalising of an object does not
A. Refine coarse grain structure obtained during hot working
B. Improve ductility
C. Improve yield strength
D. Improve mechanical properties
Answer : B

23. Air/fuel ratio by weight for combustion of methane with theoretical quantity of air will be about
A. 9 : 1
B. 17 : 1
C. 23 : 1
D. 29 : 1
Answer : B

24. Wrought iron is not
A. Ductile & resistant to corrosion/rusting
B. Weldable easily
C. Having uniform strength in all directions
D. Having maximum tensile strength along the lines of slag distribution
Answer : C

25. 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

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

27. The 'transition temperature' for ductile to brittle behaviour of steel increases with increase in the __________ content in steel.
A. Carbon
B. Manganese
C. Both 'a' nor 'b'
D. Neither 'a' nor 'b'
Answer : A

28. Heat required to raise the temperature of a body by 1 °C is called its
A. Heat capacity
B. Specific heat capacity
C. Thermal conductivity
D. Water equivalent
Answer : A

29. The refrigerant freon-12 is chemically
A. CCl₂F₂
B. CCl₃F
C. CClF₃
D. CCl₄F
Answer : A

30. Evaporative cooling process employs a combination of cooling and humidification in which the
A. Sensible heat is added
B. Sensible heat is removed and the latent heat is added
C. Latent heat is removed
D. Sensible heat is added and latent heat is removed
Answer : B

31. Corona discharge is related to the operation of a/an
A. Induction motor
B. Electrostatic precipitator
C. Fast breeder reactor
D. Magneto hydrodynamic generator (MHD)
Answer : B

32. In the acid Bessemer process, the hot metal should have the following composition.
A. S < 0.05% and P < 0.05%
B. S < 0.05% and P < 1.5%
C. S < 0.05% and P > 1.5%
D. S > 1.5% and P < 0.05%
Answer : A

33. Square steel key is normally strong in failure by shear & crushing. Keys are normally made of __________ steel bars.
A. Hot rolled mild
B. Cold rolled mild
C. Forged
D. Machinable stainless
Answer : B

34. Metallic surveying tapes are made of __________ which has a low co-efficient of expansion & enough strength.
A. Invar
B. Hastelloy
C. Duralumin
D. Monel metal
Answer : A

35. Volumetric composition of flue gas analysed with the Orsat apparatus is : CO₂ = 12%, O₂ = 8%, CO = nil, N₂ = 80%. This flue gas composition indicates that
A. Pure oxygen has been used for combustion
B. Nitrogen percentage in the fuel is very high
C. Excess air has been used for combustion
D. Hydrogen is not present in the fuel
Answer : C

36. Steel is welded using the __________ flame.
A. Carburising
B. Neutral
C. Oxidising
D. All (A), (B) & (C)
Answer : B

37. Minimum number of members required to form a Public Limited Joint Stock Com-pany is
A. 7
B. 10
C. 12
D. 17
Answer : A

38. The pressure drop per unit length for laminar flow of fluid through a long pipe is proportional to (where, A = cross-sectional area of the pipe & D = Diameter of the pipe)
A. A
B. D
C. 1/A
D. 1/A²
Answer : C

39. Yield strength of a polycrystalline metal with an average grain size d, is proportional to
A. d^1/2
B. d^-1/2
C. d
D. d^-1
Answer : B

40. Which one can be directly solidified from gaseous state without entering into liquid state?
A. Helium
B. Oxygen
C. Carbon dioxide
D. None of these
Answer : C

41. Metal cutting by oxy-acetylene flame is accomplished by the __________ of the metal.
A. Burning
B. Intensive oxidation
C. Evaporation
D. None of these
Answer : B

42. Pick out the wrong statement.
A. Molecules with symmetrical arrangements (e.g. CH₄ or CCl₄) are non-polar
B. Generally, non-polar compounds are chemically inactive, conduct electricity poorly and do not ionise
C. Most of the hydrocarbons are non-polar
D. None of these
Answer : D

43. The laminar boundary layer thickness in zero pressure gradient flow over a flat plate along the x-direction varies as x^0.5 while the thickness of turbulent boundary layer vaies as (where, x = distance from the leading edge)
A. x^1.5
B. x^0.8
C. x^-1.5
D. x^-0.8
Answer : B

44. Liquid nitrogen containers can be made from
A. Ferritic stainless steel
B. HSLA steel
C. Titanium
D. Austenitic stainless steel
Answer : B

45. Which of the following alloying elements is present in maximum percentage in high speed steel?
A. Molybdenum
B. Chromium
C. Tungsten
D. Vanadium
Answer : A

46. Atomic __________ of an element is a whole number.
A. Weight
B. Number
C. Volume
D. Radius
Answer : B

47. Which of the following is the largest quantum of pressure?
A. 1 kg/cm²
B. 1 bar
C. 1 atmosphere
D. 1 kilo Pascal
Answer : C

48. Which of the following is not an explosive?
A. TNT
B. CMC
C. RDX
D. Lead azide
Answer : B

49. Leakage in a cooking gas cylinder is detected by
A. Radio-isotopes
B. Pouring soap solution on the surface and locating the gas bubbles
C. Halide torch
D. Pungent smell of mercaptans present in the gas
Answer : D

50. In electrical resistance welding, distortion results from the use of improper
A. Clamping methods
B. Electrodes
C. Current
D. Filler material
Answer : A