PU CET PG 2018 Question Paper M.E._Chemical with specialization in Environmental Engg._

M.E.(Chemical with specialization in Environmental Engg.)

1 2
1. The inverse of the matrix is
3 4
−2 −1 −2 3/2
A) B)
−3/2 −1/2 1 −1
−2 1 2 −3/2
C) D)
3/2 −1/2 −1 1/2
2. Which one of the following functions y(x) has the slope of its tangent equal to ?
Note: a and b are real constants.

A) y = B) y = ax+b C) y = D) y = √ +

3. lim is
→
A) 0 B) 1 C) 2 D) ∞

4. If f(x) = | |, then
A) f(x) is continuous at x = 0 B) f(x) is not continuous at x = 0
C) f(x) is differentiable at x = 0 D) None of these

5. With increase in temperature, viscosity of a liquid
A) Increases B) Decreases
C) Remains constant D) May increase or decrease, depends on the liquid

6. Reynolds number for flow of water at room temperature through 2 cm dia pipe at an
average velocity of 5 cm/s is around
A) 2000 B) 10 C) 100 D) 1000

7. Mach number is the ratio of the speed of the
A) Fluid to that of the light B) Light to that of the fluid
C) Fluid to that of the sound D) Sound to that of the fluid

8. Stoke’s law is valid, when the particle Reynolds number is
A) <1 B)>1 C) <5 D) None of these

9. Dimension of surface tension is
A) FL-1 B) F-1L C) FL-2 D) F-2L

10. ___________ is used for measuring the static pressure exerted on the wall by a fluid
flowing parallel to the wall in a pipeline
A) Venturimeter B) Pressure gauge
C) Pitot tube D) Orifice meter

11. A globe valve is the most suitable for applications in which
A) Fluid flow control is required
B) Fluid contains dispersed solid particles
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C) Valve is required to be either fully open or fully closed
D) One way valve is required
12. The most common filter aid is
A) Diatomaceous earth B) Calcium silicate
C) Sodium carbonate D) Silica gel

13. Highly viscous liquids and pastes are agitated by
A) Propellers B) Turbine agitators
C) Multiple blade paddles D) Generators

14. Out of the following size reduction equipments, the maximum feed size can be accepted
by the
A) Tube mill B) Ball mill C) Jaw crusher D) Jet pulveriser

15. Gravity settling process is not involved in the working of a
A) Hydrocyclone B) Classifier
C) Dorr-thickener D) Sedimentation tank

16. Use of baffles in agitators help in minimising the __________ tendency.
A) Swirling B) Vortexing
C) Both (A) & (B) D) neither (A) nor (B)

17. Which of the following is not categorized as a mechanical operation
A) Agitation B) Filtration C) Size enlargement D) Humidification

18. For crushing of solids, the Rittinger’s law states that the work required for crushing is
proportional to
A) The new surface created B) the size reduction ratio
C) The change in volume due to crushing D) None of these

19. A Carnot engine operates between heat reservoirs at 750 K and 300 K and produces power
of 95000 kW. The thermal efficiency of the engine is
A) 0.6 B) 0.94 C) 0.67 D) 0.4

20. For ideal gases, the Gibbs energy change of mixing depends on
A) The pressure and temperature of the mixture
B) The pressure and composition of the mixture
C) The temperature and composition of the mixture
D) The pressure, temperature and composition of the mixture

21. The number of degrees of freedom for an azeotropic mixture of ethanol and water in
vapour-liquid equilibrium is
A) 3 B) 1 C) 2 D) 0

22. A solid is transformed into vapour without going through the liquid phase
A) At triple point B) At boiling point
C) Below triple point D) Always
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23. The second law of thermodynamics states that
A) The energy change of a system undergoing any reversible process is zero
B) It is not possible to transfer heat from a lower temperature to a higher temperature
C) The total energy of the system and surroundings remains constant
D) Bone of the above

24. 1 m3 of an ideal gas at 500 K and 1000 kPa expands reversibly to 5 times its initial volume
in an insulated container. If the specific heat capacity (at constant pressure) of the gas is
21 J/mol K, the final temperature will be
A) 35 K B) 174 K C) 274 K D) 154 K

25. For a given gas, the Viral coefficients
A) Depend on pressure only B) Depend on temperature only
C) Depend on pressure and temperature D) Are independent of temperature and pressure

26. A vacuum of 100 mm Hg is equivalent to an absolute pressure of
A) 100 mm Hg B) 660 mm Hg C) 860 mm Hg D) 100/760 mm Hg

27. An urea sample is found to contain 42% (by weight) nitrogen. The actual urea content of
the sample is
A) 100% B) 90% C) 40% D) 46%

28. Carbon is burnt with dry air. Maximum possible volume percent of CO2 in the flue gas is
equal to
A) 23 B) 21 C) 50 D) 100

29. Combustion requires
A) A supply of oxygen B) A combustible fuel
C ) A source of heat energy D) All of the above

30. Which of the following liquid fuels is not obtained from crude petroleum?
A) Gasoline B) High speed diesel oil
C) Aviation turbine oil D) Biodiesel

31. Heat flux through several resistances in series is analogous to the current flowing through
several
A) Resistances in parallel B) Capacitors in series
C) Resistances in series D) None of these

32. What is Nusselt number?
A) B) C) D)
33. Nucleate boiling is promoted
A) On polished surfaces B) On rough surfaces
C) In the absence of agitation D) None of these

34. In evaporators, lowering the feed temperature
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A) Increases the heating area required B) Reduces the economy
C) Both (A) and (B) D) Decreases the heating area required

35. Vent pipes are provided in a condenser to
A) Remove non condensable gases B) Purge the condenser
C) Facilitate easy cleaning of tube D) None of these

36. When vaporization takes place directly at the heating surface, it is called
A) Film boiling B) Nucleate boiling C) Vapor binding D) None of these

37. Steam economy in case of a triple effect evaporator will be
A) 1 B) <1 C) >1 D) Between 0 and 1

38. Lewis number (Le) is
A) Sc x Pr B) Pr x St C) Sh x Pr D) St x Sh

39. Flooding results in
A) High tray efficiency B) Low tray efficiency
C) High gas velocity D) Good contact between the fluids

40. Humidification involves mass transfer between a pure liquid phase and a fixed gas which is
A) Insoluble is the liquid B) Soluble in the liquid
C) Non ideal in nature D) At a fixed temperature

41. Raoult’s law is applicable to the
A) Ideal solutions B) Real solutions
C) Mixture of water and alcohol D) Non ideal gases

42. Fenske’s equation for determining the minimum number of theoretical stages in
distillation column holds good, when the
A) Relative volatility is reasonably constant
B) Mixture (to be separated) shows negative deviation from ideality
C) Mixture (to be separated) shows positive deviation from ideality
D) Multicomponent distillation is involved

43. Total reflux in a distillation operation required minimum
A) Reboiler load B) Number of plates
C) Condenser load D) All (A), (B), and (C)

44. Only small amount of evaporation of water produces large cooling effects because of its
A) Large latent heat B) Low viscosity
C) Small latent heat D) none of these

45. For a first order isothermal catalytic reaction, A P, occurring in an infinitely
long cylindrical pore, the relationship between effectiveness factor, ε and Thiele modulus,
ϕ is
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A) ε = 1/ ϕ2 B) ε = ϕ C) ε = 1 D) ε = 1/ ϕ

46. For identical feed composition, flow rate conversion and for zero order reactions, ratio of
volume of mixed reactor to that of plug flow reactors is
A) 0 B) 1 C) <1 D) >1
k
47. The change in volume for a unimolecular-type first-order reaction A 4R
A) Increases linearly with time B) Increases exponentially with time
C) Decreases exponentially with time D) Varies parabolically with time

48. A photochemical reaction is
A) Catalyzed by light B) Initiated by light
C) Accompanied with emission of light D) Used to convert heat energy into light

49. The exit age distribution of fluid leaving a vessel is used to
A) To study the reaction mechanism
B) To study the extent of non-ideal flow in vessel
C) To know the reaction rate constant
D) To know the activation energies of reaction

50. The space-velocity is the proper performance measure of flow reactors. The space-velocity
has the units of
A) Time B) (time)-1 C)velocity D) (velocity) -1

51. What is the dispersion number for a plug flow reactor?
A) Zero B) ∞ C) 1 D) -1

52. Gypsum is chemically
A) Calcium chloride B) Potassium sulphate
C) Sodium sulphate D) Calcium sulphate

53. Yellow glycerine is made into white using
A) Activated carbon B) Diatomaceous earth
C) Bauxite D) Bentonite

54. Vulcanization of rubber
A) Decreases its tensile strength B) Increases its ozone and oxygen reactivity
C) Increases its oil and solvent resistance D) Converts its plasticity into elasticity

55. Analgesic drugs are
A) Pain relievers B) Antibiotics
C) Used in the treatment of T. B. D) Used in the treatment of typhoid

56. Oils and fats are converted to soap in a process called
A) Hydrogenation B) Esterification C) Saponification D) Drying

57. Bleaching action of bleaching powder is due to its __________ properties
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A) Reducing B) Oxidizing C) Disinfecting D) pH

58. Sucrose is a disaccharide consisting of
A) Glucose and glucose B) Glucose and fructose
C) Glucose and galactose D) fructose and galactose

59. Catalyst used in alkylation process is
A) Sulphuric acid B) Nickel
C) Silica gel D) Alumina

60. Urea is represented as
A) NH2.CO.NH2 B) NH3.CO.CH3
C) NH.CO2.NH D) NH3.CO2.NH3

61. If the time constant and steady-state gain of a first order process are τp and Kp
respectively, then the transfer function of this process is equal to
A) B) C) D)

62. The dynamic response of a second-order system to unit-step change in the input is known
as underdamped response when the damping factor is
A) More than 1 B) Equal to 1 C) Less than 1 D) Equal to 0

63. Bode diagrams represent the response of a system to a
A) Unit-step change in the input B) Unit-impulse change in the input
C) Unit-pulse change in the input D) Sinusoidal change in the input

64. Gas chromatography is used for measurement of
A) Temperature B) Pressure C) Concentration D) Flow rate

65. Monel is the alloy of
A) Copper and nickel B) Copper and zinc
C) Copper and tin D) Aluminium and copper

66. The unit impulse response of a first order process is given by 2e -0.5t. The gain and time
constant of the process are, respectively
A) 4 and 2 B) 2 and 2 C) 2 and 0.5 D) 1 and 0.5

67. A reactor has been installed at a cost of Rs. 50,000 and is expected to have a working life
of 10 years with a scrap value of Rs. 10,000. The capitalized cost (in Rs.) of the reactor
based on an annual compound interest rate of 5% is
A) 1,13,600 B) 42,000 C) 52,500 D) 10,500

68. ASP is an acronym for most commonly used biological wastewater treatment process.
A) Advanced sludge process B) Activated slurry process
C) Aerated sludge programme D) Activated sludge process

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69. Excess fluoride is harmful to which part of the human body.
A) Tissue B) Bones C) Teeth D) Both Bones and Teeth

70. Which of the following treatment process is a part of primary wastewater treatment
process?
A) Screening B) Oil and grease trap
C) Sedimentation tank D) Aeration tank

71. Dissolved oxygen sag curve is applicable to
A) River system B) Ponds C) Oceans D) Glaciers

72. What is the approximate height of the troposphere
A) 0 – 20 km B) 10 – 15 km C) 12 – 20 km D) 0 – 12 km

73. pH of the drinking water as per Indian Standard [ IS 10500:2012] should be in ____ range.
A) 5.5 – 9.5 B) 6.5 – 8.5 C) 6.0 - 8.5 D) 6.5 - 9.5

74. CETP stands for
A) Common Effluent Treatment Plant B) Combined Effluent Treatment Plant
C) Continuous Energy Treatment Process D) None of these

75. Which of the element is not estimated by Flame photometer?
A) Sodium B) Potassium C) Calcium D) Manganese

x-x-x

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