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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