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Posted Date: 31 Dec 2011 Posted By:: Vaishnav Kumar Member Level: Silver Points: 5 (Rs. 1)
2011 Punjab State Board of Technical Education and Industrial Training Diploma Mechanical Engineering Material Science University Question paper
Q1. Do as directed: 
a. Lead is a ferous material. (T/F)
b. Wrought iron has less than 0.08% C. (T/F)
c. The main consitituent of Greu CT is ............
d. Copper has ............ sturcture.
e. Any material which shows property of plasticity is capacity to ger deformed on change shape under pressure is called ............
f. The cork have a ............ sturcture.
g. High temperature tempering is performed at ............
h. The process of producing hard surface of nitrides on a soft core is called ............
i. Stiffness is the property by vitue of which the material resists deformations. (T/F)
j. The test which is based on the basis of the hardness of the metal is known as ............
Note: Attempt any six questions [6X5]
Q2. a. What do you mean by ceramies materials?
b. What is crystal structure?
c. What is cast iron?
d. Write down the wurces of wrought iron?
e. What are the limitaitons of non ferrous metals?
f. What do you mean by case hardening?
g. What do you mean by plastic casting?
h. Write short notes on rubber.
Note: Attempt any two questions [15X2]
Q3. Write short notes on appearance test, sound test, spark test, weight test and magnetic test?
Q4. Write in detail the term plastics? Give the properites of olastics in detail from engineering point of view?
Q5. Write down the properties and uses of bearing metals and solders.
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