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Important Questions of Engineering Chemistry | First Year Questions | UEC Journalism Society

Practice Questions

  • Explain various internal treatments of boiler feed water.
  • Explain alkalinity and its types,
  • Explain the calorific value and its types.
  • 20ml of a standard water require 8 ml EDTA. 20 ml of a water sample require 6 ml of the same EDTA before boiling and 4ml of the same EDTA after boiling. Calculate the total permanent and temporary hardness present in the water sample (Standard hard water = 1.2 mg/ml CaCO₂)
  • Explain the following boiler troubles and their remedies: (1) Boiler corrosion  (ii) Priming and foaming .
  • Explain the following: (1) Classification of fuels with suitable examples. (ii) Significance of determination of moisture, volatile matter, ash and fixed carbon in coal.
  • Calculate the weight of dry products obtained from the combustion of 1 Kg coal possessing the following: C-80%; H-10%; S-5%; N-2%; Ash-rest.
  • Explain the following: (1) Octane number (ii) Catalytic cracking .
  • Explain the mechanism of extreme pressure lubrication .
  • Describe the classification of polymers.
  • Differentiate between thermoplastic and thermosetting plastic with suitable examples.
  • Write a short note on natural and vulcanized rubber.
  • How the following polymers are prepared? Mention their important properties and uses also. (1) PVC (ii) Nylon 6
  • How the following properties of lubricant are determined? Give their significance also. (1) Aniline point (ii) Cloud and pour point
  • What are lubricants? Discuss briefly various types of lubricating oils.
  • Why an oil should possess high viscosity index and low SEN?
  • Describe manufacture of Portland cement by wet process with chemistry of rotary kiln .
  • Explain Beer-Lambert's law and its applications.
  • Write a short note on Gas Chromatography.
  • Give the classification of refractory. What are the characteristics of a good refractory? What is refractoriness?
  • Write short note on silicon resin.
  • Give the principle of applications of IR spectroscopy.
  • What is plaster of Paris ? Where it is used?
  • How refractoriness of refractory material can be determined by pyrometric cone G equivalent ?
  • Name different types of molecular spectroscopy. In which region of electromagnetic C spectrum are they obtained. (b) Classify refractories, giving one example of each class. (c) Give setting and hardening reactions of cement.
  • Discuss with examples the types of polymerization.
  • Write a note on epoxy resin.
  • What are plastics? Give examples.
  • Write preparation, properties and uses of Savan and PMMA.
  • What is vulcanization ? Explain why natural rubber needs vulcanization.
  • Explain scale formation and its disadvantage in boiler. Why is calgon conditionings better than phosphate conditioning?
  • Write down chemical reactions for calculation of lime and soda requirement for softening of hard water.
  • What is disinfection of water? How it is carried out? Explain break point chlorination.
  • Explain hardness of water. How it is determine by complexometric titration method?
  • Describe the determination of flash and fire points by penskey Marten's method. What are their significance in lubrication?
  • Distinguish between (i) thermoplastic and thermosetting plastic (ii) Addition, Condensation and co-polymerization (iii) Buna-S and Buna-N.
  • Discuss in brief the boiler corrosion. How it is controlled?
  • What is natural rubber? What are its drawbacks? Discuss vulcanization process and its advantages.
  • What is Kocking of fuel? Explain octane number and Cetane Number along with their significance.
  • Write down the synthesis of nylon-6 and nylon 6:6 from hydrocarbon.
  • What are constituent of cement? Discuss the mechanism of setting and hardening of Portland cement with chemical reaction involve in it. 
  • What are refractories? How are they classified? Give three characteristic of good refractory material. 
  • Write down preparation properties and uses of following. (i) Bakelite (ii) urea formaldehyde (iii) Dacron.
  • What are different types of fuels? What are characteristic of a good fuel?
  • Discuss various mechanism of lubrication.
* Questions will be updated . Check regularly .
* Repeated questions are the most important .


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