NEET PG - Chemical Engineering Basics 1000+ MCQ [Solved] PDF Download

1. Which of the following materials has the maximum shrinkage allowance?
A. Brass
B. Cast iron
C. Lead
D. Aluminium alloy
Answer : C

2. Which of the following performance characteristics of a S.I engine is not affected by the front end volatility of the petrol used?
A. Vapour locking
B. Hot starting
C. Spark plug fouling
D. All 'a', 'b' & 'c'
Answer : C

3. A material subjected __________ must have high resilience.
A. Shock loading
B. Vibration
C. Fatigue
D. Tension
Answer : A

4. 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

5. 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

6. If the demand for an item is trebled and the order cost is reduced to one third, then the economic order quantity
A. Is trebled
B. Remains unchanged
C. Decreases by a factor of 3
D. Decreases by a factor of 1/3
Answer : B

7. Speed of a submarine in deep sea & that of an aeroplane is measured by a/an
A. Pitot tube
B. Hot wire anemometer
C. Rotameter
D. Stroboscope
Answer : A

8. Pick out the wrong statement about the machinability of metals. Machinability of a metal
A. Decreases with increase in strain hardening tendencies
B. Decreases with increase in hardness, in general
C. Depend on the composition, microstructure and physical & mechanical properties
D. Decreases with increases in tensile strength & decrease in grain size
Answer : D

9. Biological shield in a nuclear reactor is generally provided to protect against the
A. ?-rays
B. ?-rays
C. Gamma rays & neutrons
D. Electrons
Answer : C

10. Density in the solid state is slightly less than that in its liquid state, in case of
A. Carbon dioxide
B. Water
C. Mercury
D. None of these
Answer : B

11. Wohler test is a destructive test to find out the __________ strength of a prepared metal specimen.
A. Creep
B. Fatigue
C. Endurance
D. Tensile
Answer : B

12. As per the Indian boiler regulation (IBR), the type of joint preferred for the circumferential joint is the __________ joint.
A. Butt
B. Lap
C. Welded
D. None of these
Answer : B

13. Otto cycle used in spark ignition petrol engines is also known as the constant __________ cycle.
A. Volume
B. Pressure
C. Heat
D. None of these
Answer : A

14. 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

15. __________ of air does not increase with increase in temperature.
A. Density
B. Thermal diffusivity
C. Viscosity
D. Thermal conductivity
Answer : A

16. At absolute zero temperature, for any reaction involving condensed phases
A. ? G° = 0 , ? H° = 0
B. ? H° = 0 , ? S° = 0
C. ? S° = 0 , ? E° = 0
D. ? S° = 0 , ? Cp° = 0
Answer : C

17. __________ is the process used for setting up compressive stresses in the surface of a metal to improve its fatigue strength.
A. Lancing
B. Shot peening
C. Slugging
D. Spinning
Answer : B

18. The ability of tool steel to resist softening at high temperatures is termed as __________ hardness.
A. Red
B. Extended
C. Super
D. Extreme
Answer : C

19. Fog is an example of colloidal system of
A. Solid dispersed in gas
B. Solid dispersed in liquid
C. Liquid dispersed in gas
D. Gas dispersed in liquid
Answer : C

20. Pick out the wrong statement.
A. Geothermal energy is a non-conventional source of energy
B. Mass is converted into energy in both nuclear fission & fusion reaction
C. Inhalation of mercury vapour is not harmful for human beings
D. Inhalation of arsenic causes cancer
Answer : C

21. 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

22. Out of the following, which will fracture most readity, when hit with a hard hammer?
A. Brass
B. Bronze
C. German silver
D. Cast iron
Answer : D

23. Maximum hardenability of steel depends upon its
A. Chemical composition
B. Carbon content
C. Grain size
D. Alloying elements content
Answer : D

24. Cast iron contains __________ percent carbon.
A. 2.5
B. 3.75
C. 4.75
D. 5.25
Answer : A

25. 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

26. 'Amortization' in respect of financial obligation of a company means the
A. Liquidation of financial obligations on instalment basis
B. Commitment of financial obligation on priority
C. Liquidation of all the obsolete equipments of the company
D. Modernisation of the plant equipments
Answer : A

27. In chemical dehumidification of air
A. Both specific humidity & dry bulb temperature increases
B. Both specific humidity & dry bulb temperature decreases
C. Specific humidity decreases & dry bulb temperature increases
D. Specific humidity increases & dry bulb temperature decreases
Answer : C

28. Which of the following are considered applications of ultrasonic testing?
A. Determination of elastic constant
B. Detection of defects in metal
C. Measurement of material thickness
D. None of the above
Answer : B

29. Thermal equivalent of electrical power in practical calculation is __________ kcal/kWh.
A. 746
B. 3000
C. 1000
D. 550
Answer : B

30. The emf of a Deniell cell Zn | Zn²⁺ || Cu²⁺ | Cu can be increased by
A. Decreasing the surface area of the electrodes
B. Increasing the concentration of zinc sulphate solution
C. Increasing the surface area of the electrodes
D. Increasing the concentration of copper sulphate solution
Answer : D

31. The temperature at which ferromagnetic material can no longer be magnetised by the outside forces, is termed as the
A. Critical point
B. Curie temperature
C. Inversion temperature
D. Eutectic temperature
Answer : B

32. A material in which the atoms are arranged regularly in some directions but not in others, is termed as 'mesomorphous material'; an example of which is
A. Lead
B. Glass
C. Mica
D. Silver
Answer : A

33. 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

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

35. Which of the following pairs is not correctly matched?
A. Uranium - 233 : Fertile material
B. Binding energy : Mass defect
C. Scattering: Absorption cross-section
D. Number of nucleons : Mass number
Answer : A

36. Eutectoid composition of carbon steel at room temperature is
A. Cementite
B. Pearlite
C. Martensite
D. Ferrite
Answer : B

37. Presence of nickel & chromium in steel does not raise its
A. Elastic limit
B. Machining properties
C. Ductility
D. Resilience
Answer : A

38. 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

39. Addition of __________ to steel does not help in improving its machinability.
A. Sulphur
B. Silicon
C. Lead
D. Phosphorous
Answer : B

40. __________ number determines whether the fluid flow in an open channel is supercritical, critical or sub-critical.
A. Mach
B. Reynolds
C. Froude
D. Weber
Answer : C

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. Maraging steels derive their strength from the following mechanism:
A. A fine, highly dislocated and strong martensite
B. Fine dispersions of inter-metallic of Fe, Ni, Ti etc
C. Fine dispersions of alloy carbides in a ferrite matrix
D. Fine dispersions of C nucleated on dislocations in austenite
Answer : A

43. Copper deposits are found in India at the following location:
A. Kudremukh
B. Kolar
C. Khetri
D. Ramagundam
Answer : C

44. Young's modulus of a material is the measure of its
A. Stiffness
B. Malleability
C. Creep resistance
D. Tensile strength
Answer : A

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

46. Most of the phosphorous present in the blast furnace burden enters into
A. Hot metal
B. Flue gases
C. Slag
D. Refractory lining
Answer : A

47. Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect of free convection over a vertical flat plate as
A. Gr^0.25, Gr
B. Gr^0.25, Gr^0.33
C. Gr, Gr^0.25
D. Gr^0.33, Gr^0.25
Answer : A

48. Brazing is the joining of metals
A. Without melting the base metal
B. With a non-ferrous filler
C. Both (A) & (B)
D. Neither (A) nor (B)
Answer : C

49. Removal of non-condensable from steam or other vapour is termed as the __________ process.
A. Condensation
B. Deaeration
C. Scavenging
D. Exhaust
Answer : B

50. The critical pressure at which the latent heat of vaporisation of steam becomes zero is __________ Kg/cm².
A. 273.15
B. 225.65
C. 100.03
D. 373.15
Answer : B