Chemical Engineering Basics 1000+ MCQ with answer for IBPS PO

1. The yield point phenomenon observed in annealed low carbon steel is due to the presence of the following element.
A. Silicon
B. Carbon
C. Phosphorous
D. Chromium
Answer : B

2. Which of the following heat treatment processes is usually applied to castings?
A. Tempering
B. Annealing
C. Normalising
D. Carburising
Answer : D

3. Materials having __________ lattice structure are usually the most ductile.
A. Body centred cubic (bcc)
B. Hexagonal close packed (hcp)
C. Face centred cubic (fcc)
D. None of these
Answer : C

4. Which of the following has the highest value of refractive index?
A. Brine (sea water)
B. Diamond
C. Distilled water
D. Glass
Answer : B

5. The elastic strain energy of a unit length of an edge dislocation as compared to that of a screw dislocation is
A. More
B. Equal
C. Less
D. Double
Answer : A

6. Particle nature of cathode rays is proved due to the fact that they
A. Travel in a straight line
B. Get deflected by magnetic electric field
C. Produce fluorescence
D. Heat the exposed material
Answer : B

7. Potable water means the water used for
A. Fire-fighting
B. Cooling
C. Drinking
D. Evaporation to produce steam
Answer : C

8. In practice, the compression ratio of compression-ignition (CI) engine ranges from
A. 15 to 25
B. 5 to 10
C. 40 to 55
D. 60 to 70
Answer : A

9. Basic open hearth furnace (BOF) is not used for producing __________ steel.
A. Killed
B. Rimming
C. High alloy
D. None of these
Answer : C

10. What is the value of included angle of a triangular notch for maximum discharge?
A. 30°
B. 60°
C. 90°
D. 120°
Answer : C

11. For efficient performance of a blast furnace, the extent of reduction of Wustite (F_eO) should be
A. 100% indirect reduction
B. 100% direct reduction
C. 50-60% indirect reduction
D. 30-40% indirect reduction
Answer : C

12. __________ is the most important element, which controls the physical properties of steel.
A. Manganese
B. Silicon
C. Carbon
D. Vanadium
Answer : C

13. Which of the following terminology is used for the temperature at which new grains are formed in a metal?
A. Eutectic temperature
B. Lower critical temperature
C. Recrystallisation temperature
D. Upper critical temperature
Answer : C

14. 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

15. The function of neutral flux used in the pyrometallurgy of metal extraction is to increase the __________ of the slag.
A. Fluidity
B. Basicity
C. Acidity
D. Viscosity
Answer : A

16. Consideration of the creep is the most important in case of the
A. Blades of gas turbine
B. Piston of an I. C. engine
C. Flywheel of steam engine
D. Cycle chain
Answer : A

17. For dynamic strain measurement, the Wheatstone bridge used is of __________ type.
A. Voltage sensitive null
B. Voltage sensitive deflected
C. Current sensitive deflected
D. None of these
Answer : B

18. Out of the following, the alloy which has equal percentage of constituents, is
A. White metal
B. Gun metal
C. Duralumin
D. Constantan
Answer : D

19. Desalination of water
A. Makes it potable
B. Makes it non-potable
C. Means distillation of water
D. None of these
Answer : A

20. Super conduction in metals is observed at a temperature of __________ °K.
A. <100
B. >100
C. About 273
D. About 373
Answer : B

21. Milk is fat dispersed in water. It is an example of
A. Suspension
B. Emulsion
C. Gel
D. Solution
Answer : B

22. Hollow shafts can be made as strong as solid shafts by making the twisting moments of both the shafts same. Shafts made by __________ have residual stresses.
A. Forging
B. Cold rolling
C. Hot rolling
D. Casting
Answer : B

23. Softening of hardened steel is done by its
A. Normalising
B. Tempering
C. Annealing
D. Carburising
Answer : A

24. Specific __________ is a dimensionless quantity.
A. Heat
B. Humidity
C. Weight
D. None of these
Answer : D

25. 'GASOHOL' widely used in Brazil as a motor fuel is a mixture of alcohol and
A. Petrol
B. LPG
C. Light hydrocarbon gases (e.g. butane or propane)
D. None of these
Answer : A

26. 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

27. In multipass welds, shot peening is done after each pass to
A. Close the surface porosity
B. Break the continuity of columnar grains
C. Flatten the weldment
D. Introduce texture in the weld
Answer : A

28. Pick out the wrong statement.
A. For a pressure vessel to be classified as 'thin vessel', the ratio of wall thickness to mean radius is less than 0.1
B. For calculating forces and efficiency of riveted joint, either rivet diameter or rivet hole diameter is used in case of pressure vessel and in structural work
C. Longitudinal joint is normally made butt joint to maintain the circularity of the vessel
D. Maximum diameter of the opening provided in a pressure vessel, which does not require any compensation is 200 mm
Answer : B

29. Production of one ton of paper in Indian paper industry consumes about __________ kWh of electricity.
A. 300
B. 800
C. 1400
D. 2000
Answer : C

30. Work study deals with the __________ study.
A. Time
B. Motion
C. Both (A) & (B)
D. Neither (A) nor (B)
Answer : C

31. __________ 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

32. Circular cross section machine parts which are symmetrical about the axis of rotation are made by hot
A. Piercing
B. Spinning
C. Drawing
D. Extrusion
Answer : B

33. Consider the equilibrium A(g) + B(g) = AB(g). When the partial pressure of A is 10-2 atm, the partial pressure of B is 10-3 atm and the partial pressure of AB is 1 atm, the equilibrium constant 'K' is
A. 10 atm-1
B. 105 atm-1
C. 10 (dimensionless)
D. 105 (dimensionless)
Answer : B

34. Lap joints are preferred over butt joints in soldering/brazing, because these joints are
A. Weaker in tension but stronger in shear
B. Weaker in shear but stronger in tension
C. Stronger in both shear and tension
D. The lap joints are easily made
Answer : D

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

36. The minimum and the maximum number of members required to form a Private Limited Joint Stock Company are respectively
A. 7 and 30
B. 10 and 50
C. 2 and 50
D. 13 and 55
Answer : C

37. Routing in production, planning & control is concerned with the
A. Sequence of operation to be performed
B. Progress of work performed
C. Authorisation of work to be performed
D. Balancing of load on machines
Answer : A

38. The minimum temperature to which the water can be cooled in a cooling tower is the __________ temperature of air.
A. Ambient
B. Dry bulb
C. Dew point
D. Wet bulb
Answer : C

39. Case hardening is not done by
A. Nitriding
B. Hot dipping
C. Electroplating
D. Both b & c
Answer : D

40. Absolute zero, pressure will occur, when the molecular momentum of the system becomes zero. A liquid will cease to exist as liquid at
A. High vacuum
B. Zero pressure
C. 0°K
D. Earth's centre
Answer : B

41. Though tin occurs lower than iron in the electrochemical series, yet it is coated on steel for corrosion protection, because of its
A. Lower cost
B. Abundant availability
C. Resistance to vegetable acids as the tin plate are commercially used in 'canning' industry
D. None of these
Answer : C

42. Main constituent of bone ash is
A. Ammonium phosphate
B. Calcium phosphate
C. Animal charcoal
D. Ammonium sulphate
Answer : B

43. Alloy powder manufactured by the following process have spherical shapes.
A. Electrochemical deposition
B. Gaseous reduction
C. Atomisation
D. Mechanical attrition
Answer : C

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

45. 'Ice point' is designated on Fahrenheit temperature scale by
A. 0°
B. 32°
C. 62°
D. 212°
Answer : B

46. __________ test is the appropriate test to determine whether a material is ductile or brittle.
A. Impact
B. Cupping
C. Hardness
D. Tensile
Answer : A

47. Blasting of tri-nitro-toluene (TNT) is done by mixing it with ammonium
A. Nitrate
B. Sulphate
C. Carbonate
D. Chloride
Answer : A

48. 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

49. __________ circuit is most commonly used to measure strain with the help of a strain gauge.
A. Ballast
B. Voltage balancing potentiometric
C. Simple current sensitive
D. None of these
Answer : B

50. L.D. (Linz-Donawitz) converter is used in the production of
A. Copper
B. Steel
C. Zinc
D. Aluminium
Answer : B