Maharashtra State Board of Technical Education 2008 Diploma Automobile Engineering Materials and Manufacturing Processes - Question Paper

Sample ques. Paper – I
Course Name :- Automobile Engineering
Course code :- AE
Semester :- Third
Subject :- Materials and Manufacturing Processes
Duration :- three hours Marks: 80


Instructions:

1. All ques. are compulsory.
2. Figures to the right shows full marks.


Q 1: Attempt any 8 of the following: [Marks:(8 x two = 16)]

a) Classify the engineering materials in 3 broad groups according to their mode of occurrence.

b) What is mean by the term “composite materials”.

c) describe the term “heat treatment”

d) Write any 2 purposes of hardening & tempering.

e) describe adhesiveness and refractoriness.

f) Draw & show the different parts of gating system.

g) elaborate the 2 kinds of cutting tools ? provide 2 examples of every.

h) Write any 4 uses of cutting fluid?
i) Write any 4 kinds of drilling machines.
j) List the operations performed on lathe machine.


Q two : Attempt any 3 of the subsequent : [Marks:(3 x 4=12)]

a) What is an alloy steel? Write the effect of any 2 alloying elements on steel ?

b) List any 4 special alloy steels. Write the composition and application of any 1 alloy steel.

c) State the composition of brass and write the importance of it in industry.

d) List the properties of aluminium that make it a useful engineering metal.


Q three : Attempt any 3 of the subsequent : [Marks:(3 x 4=12)]

a) State the composition and properties of grey cast iron.

b) Draw the Iron – carbon equilibrium diagram and show the critical temperatures on it.

c) What is the purpose of surface hardening .

d) Write the properties and applications of any 2 polysetting plastics.


Q four : Attempt any 4 of the following: [Marks:(4 x 4=16)]

a) Differentiate ranging from annealing and normalizing.

b) What is pattern? elaborate the various allowances provides on the pattern?

c) State the advantages and disadvantages of centrifugal casting process.

d) State the uses of chills and chaplets.

e) elaborate the factors considered for selecting trend materials.

f) Write the steps of casting process by using spilt trend.


Q five : Attempt any 3 of the subsequent : [Marks:(3 x 4=12)]

a) List the different materials used for making trend.

b) Write the standard accepted colour codes for trend.

c) Draw the neat sketch of single point cutting tool and show the various parts and angles on it.

d) List the different accessories used on lathe machine , Draw sketches of any 2 .


Q six : Attempt any 3 of the subsequent : [Marks(3 x 4=12)]

a) State the various properties needed in moulding sand .

b) compute the change gears for cutting threads having pitch of two mm on lathe having lead screw of six mm pitch.

c) Write the procedure of cutting threads on screw used in screw jack.

d) List the different kinds of drills used on drilling machine. Sketch any 2 of them.

Earning:   Approval pending.