Eng. Chemistry Important Questions – B.Tech 1st Year
Explain the following two theories for the mechanism of the lubricants. (a) Boundary lubrication (b) Extreme pressure lubrication.
2 litres of water obtained from a borewell in Patancheru near Hyderabad gave the following analysis for salts :- FeSO4 = 30.4 mg; CaSO4 = 13.6mg; MgCl2 = 38 mg; Ca(HCO3)2 = 32.4 mg; Mg(HCO3)2 = 14.6mg; NaCl = 11.7 mg.
With a neat diagram describe the Orsat gas analysis method. What is the special precaution to be taken in the measurement?
What are the Constituents of petroleum? Describe the Origin of petroleum.
What is meant by the “softening” of water?
How is the “Softening” of water carried out using the Zeolite Process?
The analysis of fuel gases was found to contain the following percentage by Volume CO2=13%, O2 =6%. Find the air per kg of coal if the carbon content of coal is 85%.
Assume that the lime used is only 85% pure and soda is only 95% pure and the molar masses of Mg(HCO3)2 and CaSO4 are respectively 146 and 136.
Write a note on the conditions leading to the failure of refractory material.
Write a note on lubricants with special reference to their classification, mode of action, examples, and applications.
What is the Alkalinity of water due to and how it is estimated?
How are the refractories are classified? Give one example for each class.
What is coal? How it is formed? Discuss the qualities of good coal.
Give an account of the production of petrol from crude oil.
Give the Classification of coal and explain each class with examples.
What are the drawbacks of raw rubber? How are its properties improved?
Define the calorific values of a fuel. Distinguish gross and net calorific value.
What are Refractories? Explain Thermal spalling, strength and porosity of the refractories.
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