Tradesman Chemical Engineering - Technical Education 346/2016 Answer Key 62/2017

5/30/2017
Chemical mask white covered with bottle

Post : Tradesman Chemical Engineering
Department : Technical Education
Category Code : 346/16 Direct Recruitment
Qualification: Technical High School Leaving Certificate Examination (THSLC) in Chemical, SSLC + National Trade Certificate (NTC)/ Kerala Government Certificate in Engineering Examination (KGCE)/ Vocational Higher Secondary Certificate Course (VHSE) in Chemical
Question Paper Code : 62/17
Date of Test : 30-05-2017



  1. The mass of 2 litre carbon monoxide at STP
    • 1.6 g
    • 2.5 g
    • 2.0 g
    • 2.8 g

  2. The volume occupied by one gram-equivalent of oxygen at 0° C and 550 mm Hg
    • 7.74 litres
    • 5.6 litres
    • 6.84 litres
    • 6.08 litres

  3. 21 ml of an acid can be neutralized by 7 ml of 0.3 N alkali solution, what is the normality of acid?
    • 0.3 N
    • 0.2 N
    • 0.1 N
    • 0.6 N

  4. If four alpha particles and two beta particles are emitted from uranium (atomic number 92). What will be atomic number of new element formed?
    • 100
    • 102
    • 98
    • 86

  5. How many gm-moles are present in 400 gm of sodium hydroxide?
    • 100
    • 50
    • 10
    • 40

  6. A wet stock of ammonium sulphate contains 25% on dry basis. What is the percentage of moisture present, if it is expressed in wet basis?
    • 30%
    • 32.5%
    • 25%
    • 20%

  7. How many grams of carbon are present in 528 g of carbon dioxide?
    • 72 g
    • 144 g
    • 44 g
    • 1936 g

  8. An automobile tire is inflated to pressure of 175 KPa at 273 K. By controlling the pressure at 250 KPa, upto what temperature, the tire can be heated?
    • 390 K
    • 350 K
    • 400 K
    • 375 K

  9. The difference between the dry bulb and wet bulb temperature is known as
    • Boiling temperature
    • Condensing temperature
    • Wet bulb depression
    • Dry bulb depression

  10. An example of unit process is
    • Evaporation
    • Condensation
    • Filtration
    • Ion-exchange

  11. The residual solution from which the solute extracted is known as
    • Raffinate
    • Residue
    • Extract
    • Solvent

  12. Find the pressure which is not equal to 1 standard atmosphere.
    • 1.01325 bar
    • 1.01325 Pa
    • 760 mm Hg
    • 1.01325 × 105 N/m2

  13. 1 g mole of a compound consists of
    • One molecule of the compound
    • 6.023 × 1023 molecules
    • One atom of the compound
    • 22.4 × 102 molecules

  14. 500 kg of wet solid are to be dried from 60% to 20% moisture. How many kilograms of water removed?
    • 400
    • 200
    • 300
    • 100

  15. Constant volume process is known as
    • Isobaric process
    • Isothermal process
    • Adiabatic process
    • Isochoric process

  16. Aqua regia is a mixture of concentrated
    • Nitric acid and hydrochloric acid
    • Sulphuric acid and hydrochloric acid
    • Sulphuric acid and nitric acid
    • Phosphoric acid and sulphuric acid

  17. Unit of viscosity is
    • N/m2
    • PaS
    • g/cm2
    • N/s

  18. German silver contains
    • Germanium, Silver, Copper
    • Copper, Silver, Nickel
    • Copper, Nickel, Zinc
    • Silver, Germanium, Gold

  19. If pH value of a solution decreases from 3 to 2, then hydrogen ion concentration change by
    • Increases 10 times
    • Decreases 20 times
    • Remain unchanged
    • Doubles

  20. Convert the 50% of methanol-water mixture by weight to mole %.
    • 50 mole %
    • 36 mole %
    • 64 mole %
    • 25 mole %

  21. Density of water at 0° C and at 1 atm pressure
    • 1000 kg/cm3
    • 1000 kg/cm2
    • 1000 kg/m3
    • 1000 g/cm3

  22. Reynolds number is the ratio of
    • Viscous forces to inertial forces
    • Viscous forces to static forces
    • Static forces to viscous forces
    • Inertial forces to viscous forces

  23. Terminal velocity is
    • The varying velocity
    • The initial velocity
    • The highest velocity attainable by an object in free fall
    • The relative velocity

  24. Priming should be done before starting
    • Diaphragm pump
    • Reciprocating pump
    • Gear pump
    • Centrifugal pump

  25. Torr is a unit of
    • Pressure
    • Velocity
    • Viscosity
    • Density

  26. Average molecular weight of air
    • 79
    • 29
    • 39
    • 23

  27. Mass number of an atom is the sum of the numbers of
    • Protons and neutrons
    • Protons and electrons
    • Neutrons and electrons
    • None of these

  28. An example of semiconductor
    • Krypton
    • Xenon
    • Argon
    • Silicon

  29. Thermosetting plastics are
    • Chain molecules
    • Cross-linked molecules
    • Simple polymers
    • None of these

  30. Teflon is the commercial name of
    • Titanium dioxide
    • Polyvinyl chloride
    • Polyethylene
    • Polytetrafluoroethylene

  31. Which is the purest form of iron?
    • Cast Iron
    • Wrought Iron
    • Pig Iron
    • Steel

  32. DDT is the short form of
    • Dichloro Diphenyl Tetrachloroethane
    • Dichloro Diphenyl Trichloromethane
    • Dichloro Diphenyl Trichloroethane
    • Dichloro Diphenyl Tetrachloromethane

  33. Which of the following is not a noble gas?
    • Neon
    • Argon
    • Xenon
    • Boron

  34. Octane number of gasoline indicates its
    • Anti-knocking property
    • Ignition delay
    • Oxidation stability
    • Boiling point

  35. Phosgene is
    • Calcium chloride
    • Carbonyl sulphate
    • Carbonyl chloride
    • Calcium carbonate

  36. Vitamin C is
    • Acetic acid
    • Ascorbic acid
    • Riboflavin
    • Thiamine

  37. Nano is equal to
    • 10–8
    • 10–10
    •  10–11
    • 10–9

  38. Litmus paper
    • Gives a spectrum of colours to acid conditions
    • Turns blue under acid conditions
    • Turns red under alkaline conditions
    • Turns blue under alkaline conditions

  39. The main constituent of liquified natural gas is
    • Propane
    • Butane
    • Methane
    • Ethane

  40. Visbreaking produces
    • High octane number gasoline
    • Fuel oil of lower viscosity
    • High cetane number diesel
    • More quantity of aviation oil

  41. 41.    Catalyst used in catalytic reforming
    • Platinum
    • Nickel
    • Iron
    • Chromium

  42. Biuret formation is in the manufacture of
    • Cement
    • Paint
    • Ceramics
    • Urea

  43. Instrument which may be used for measuring small differences in pressure is
    • Inclined manometer
    • U-tube manometer
    • Bourdon gauge
    • Barometer

  44. Amount of moisture in air is determined by
    • Hydrometer
    • Polarimeter
    • Hygrometer
    • Refractometer

  45. Oleum gives the fumes of
    • Sulphuric acid
    • Oleum
    • Sulphur dioxide
    • Sulphur trioxide

  46. Emissivity of a black body is
    • Zero
    • Infinity
    • One
    • None of these

  47. Chloroform-acetone mixture is a
    • Minimum boiling azeotrope
    • Maximum boiling azeotrope
    • Does not form an azeotrope
    • None of these

  48. Critical moisture content is a point at which
    • Falling rate period starts
    • Constant rate period starts
    • Falling rate period ends
    • None of these

  49. Hardness of water is expressed in terms of
    • Magnesium carbonate
    • Calcium carbonate
    • Calcium hydroxide
    • Sodium carbonate

  50. Capacity of an evaporator is
    • Kilogram of steam fed per hour
    • Volume of water evaporated per volume of steam fed
    • Kilogram of water evaporated per kg of steam fed
    • Kilogram of water vapourised per hour

  51. Example of a non-Newtonian fluid
    • Paint
    • Kerosine
    • Glycerine
    • Sugar in water

  52. Flow controlling value
    • Gate value
    • Check value
    • Butterfly value
    • Plug value

  53. Pressure at “Vena Contracta” is
    • Greater than the system pressure
    • Less than the system pressure
    • Equal to system pressure
    • None of these

  54. The value of universal gas constant at calories per mol degree Kelvin
    • 6.023
    • 6.236
    • 8.314
    • 1.987

  55. An example of thermoplastic
    • Polytetrafluoroethylene
    • Urea formaldehyde
    • Phenol formaldehyde resins
    • Epoxy resin

  56. Blow down is not used for
    • To remove inerts
    • To prevent scale formation
    • To reduce pressure
    • To improve efficiency

  57. Which of the following removes latent heat?
    • Cooler
    • Condenser
    • Chiller
    • None of these

  58. The shortest centre-to-centre distance between the adjacent tubes in heat exchangers is called
    • Clearance
    • Pitch
    • Baffle spacing
    • Pass

  59. The indicator used in titration involving a strong base
    • Phenolphthalein
    • Methyl orange
    • Methyl red
    • EBT

  60. Which one is used as a firefighting technique?
    • Removing the combustibles
    • Blanketing
    • Cooling
    • All of these

  61. Addition of ozone in water treatment for
    • Disinfection
    • Increasing the oxygen content
    • Decolourisation
    • None of these

  62. Milk powder is made from milk by drying in a
    • Band drier
    • Drum drier
    • Spray drier
    • Rotary drier

  63. Psychrometric chart is used for the study of properties of mixtures of
    • Air-water
    • Ethanol-water
    • Methanol-water
    • None of these

  64. The commonly used ratio of actual reflux to minimum reflux is
    • 2.5
    • 1.5
    • 2.0
    • 3.0

  65. Which one of the following characteristics of instrument is desirable?
    • Time lag
    • Dead zone
    • Drift
    • Reproducibility

  66.  – 273° C is equal to
    • Zero ° K
    • Zero ° F
    • 100° K
    • 313° K

  67. Example of an over flow analysis
    • Screening
    • Pipette analysis
    • Beaker decantation
    • None of these

  68. 68.    Which of the following produces the smallest particle size?
    • Blake jaw crusher
    • Hammer mill
    • Ball mill
    • Gyratory crusher

  69. Fruit juice can be concentrated by
    • Falling film evaporator
    • Rising film evaporator
    • Vertical tube evaporator
    • Horizontal tube evaporator

  70. Most effective equipment for removing fine dust particle from air
    • Cyclone separator
    • Bag fitter
    • Scrubber
    • Electrostatic precipitator

  71. Dry ice is solid
    • Water
    • Ethanol
    • Carbon dioxide
    • Carbon monoxide

  72. Which of the following radiation produces heat?
    • X-ray
    • UV ray
    • Gamma ray
    • Infrared

  73. The substance used as neutron moderator in nuclear reactor is
    • Heavy water
    • Dry ice
    • Liquid oxygen
    • Liquid nitrogen

  74. A variable area flow meter
    • Rotameter
    • Orifice meter
    • Venturimeter
    • Pitot tube

  75. Pasteurization of milk is done by heating 74° C for
    • 1 minute
    • 15 seconds
    • 3 minutes
    • 45 seconds

  76. The lowest temperature at which the oil vapour ignites and continues to burn for 5 seconds is called
    • Flash point
    • Cloud point
    • Fire point
    • Pour point

  77. Brass is composed of
    • Cu-Zn
    • Cu-Fe
    • Cu-Sn
    • Cu-Al

  78. Which one of the process is used for water softening purpose?
    • Lime soda
    • Zeolite
    • Ion-exchange
    • All of these

  79. Enzyme is a
    • Catalyst in biochemical reaction
    • Living plant
    • Poison
    • All of these

  80. Vanaspati is produced by the process of
    • Hydrolysis
    • Hydrogenation
    • Oxidation
    • Reduction

  81. Which of the following countries signed the Indus Waters Treaty?
    • India-China
    • India-Myanmar
    • India-Pakistan
    • India-Bangladesh

  82. Name the territorially largest district of India.
    • Bikaner
    • Leh
    • Kurnool
    • Kutch

  83. Which soil is also known as ‘regur soil’?
    • Alluvial soil
    • Black soil
    • Red soil
    • Laterite soil

  84. When was the Reserve Bank of India established?
    • First April 1935
    • First April 1948
    • First April 1936
    • First April 1950

  85. In which year was the Mahatma Gandhi National Rural Employment Guarantee Act passed?
    • 2010
    • 2005
    • 1948
    • 2016

  86. Select the river, which is not a tributary of Bharathapuzha.
    • Mampuzha
    • Thuthapuzha
    • Kalpathipuzha
    • Kannadipuzha

  87. The Twelfth Five Year Plan in India has set a target of ___________ average growth of GDP over the plan period.
    • 7%
    • 10%
    • 8%
    • 12%

  88. Which European power constructed the Pallipuram Fort?
    • The Dutch
    • The Portuguese
    • The English
    • The French

  89. Name the revolutionary, who died following a 64 day hunger strike in jail in protest of the ill-treatment of political prisoners by the jail authorities.
    • Jatindra Nath Das
    • Barin Gosh
    • Bagha Jatin
    • Bhagwati Charan Vohra

  90. Author of the play Neel Darpan
    • Rabindranath Tagore
    • Mahatma Gandhi
    • Madhusudan Datta
    • Dinabandhu Mitra

  91. Who was the founder of the protest movement named Prathyaksha Raksha Daiva Sabha?
    • Thycaud Ayya
    • Chattampi Swamikkal
    • Poikayil Yohanan
    • Vagbhatananda

  92. Name the author of the work Baalakalesam.
    • Kumaranasan
    • Pandit Karuppan
    • Ayyankali
    • Brahmananda Sivayogi

  93. Antharjana Samajam, an organization for reforming Namboothiri women, was founded by
    • Parvathy Nenmenimangalam
    • Arya Pallam
    • Lalithambika Antharjanam
    • V. T. Bhattathiripad

  94. Who was the social reformer of Kerala associated with the Villuvandi Yathra?
    • Dr. Palpu
    • Mannathu Padmanabhan
    • T. K. Madhavan
    • Ayyankali

  95. The year in which The Madras Marumakkathayam Act was passed
    • 1926
    • 1933
    • 1957
    • 1921

  96. Name the President of BCCI who was sacked by the Supreme Court on 02-01-2017.
    • Jagmohan Dalmiya
    • Shashank Manohar
    • Anurag Thakur
    • N. Sreenivasan

  97. Who was the Director of the film ‘Clash’ which was awarded with ‘Suvarna Chakoram’ at IFFK, 2016?
    • Majid Barzegar
    • Vidhu Vincent
    • Carlos Gaviria
    • Mohamed Diab

  98. Who penned the book The Sellout, which own the Man Booker Prize Award of 2016?
    • Paul Beatty
    • Marlon James
    • David Szalay
    • Richard Flanagan

  99. Name the South Korean President who was impeached in 2016.
    • Dilma Rousseff
    • Hwang Kyo-Ahn
    • Lee Myung-bak
    • Park Geun-Hye

  100. What is the main intention of the scheme ‘Lucky Grahak Yojana’ launched by the Government of India?
    • To promote consumerism
    • To eradicate poverty
    • To promote the use of e-money
    • To help the agricultural sector

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