GUJARAT INSTITUTE OF TECHNICAL STUDIES,PRANTIJ.
Question Bank of M.P-2 4th Semester
MECHANICAL ENGINEERING DEPARTMENT
Important questions may come in GTU
METAL CASTING QUESTIONS FOR STUDENTS REFERENCE
1)
Define the term pattern. List out the materials commonly used for pattern.
2)
State advantages of wood as pattern material.
3)
State the types of furnaces used in foundries. Discuss in brief the working of electric furnace.
4)
State the principle of centrifugal casting and explain its working with neat sketch. Give its
advantages.
5)
List the essential properties of moulding sand. State the effect of each properties on casting.
6)
Define pattern allowances. List various pattern allowances. State purpose of each allowances
7)
What is gating system? What are its functions? State types of gate with its advantages.
8)
Explain investment casting process. State its advantages and applications.
9)
List the various pattern materials. Explain any two along with their advantages and limitations.
10) Define following terms : 1. Cope 2. Drag 3. Core 4. Chaplet
11) Explain precision investment casting stating its advantages, limitations and applications.
12) List any two casting defects and give their causes and remedies.
13) Sketch the cross section of a sand mould which is ready for pouring and label the important parts.
14) Differentiate between hot chamber and cold chamber die casting.
15) Explain centrifugal casting process. What is the main difference between semi-centrifugal and
centrifuging casting process.
16) Calculate the optimum pouring time for casting whose mass is 20 kg and having an average
section thickness of 15mm. the material of the casting are grey cast iron and steel. Assume
K=0.7
17) Write the steps for making a casting by the removable pattern sand mould casting process.
18) With the help of diagram discuss the following types of pattern (i) Loose piece pattern (ii) sweep pattern
19) Explain following: (i) Function of additives in moulding and (ii) Various types of cores used in
casting.
20) With the help of sketches, explain centrifugal casting.
21) Write short note on "Shell Moulding Method".
22) Discuss various types of patterns in casting.
23) Explain with neat sketches types of gating systems used in casting.
24) Discuss various types of moulding sand.
25) Explain investment casting process.
26) Why the following allowances are provided on the patterns in sand moulding?
(1)
Draft (2) Contraction (3) Shaking
27) Why the properties like Permeability, Compressive strength, Flowability and Hardness are
required in a moulding sand? Explain with appropriate reasons for each of them.
28) Why a down sprue is made tapered in a gating system?
29) What is function of a feeder (riser) in casting? How the riser shape and size shall be chosen
and where the riser shall be located on the casting such that riser is able to fulfill its function?
Explain with appropriate reasons.
30) Draw neat, labeled sketches of top gating, bottom gating and part gating methods. Compare
advantages and disadvantages of top, bottom and part gating methods. Hence bring out their
applications.
31) Explain investment casting process. Compare its capabilities and applications in the context of
weight (size), dimensional tolerance, and economic quantity with sand casting and die casting
processes.
32) Sketch the cross section of sand mould which is ready for pouring and label the various important
parts.
33) What type of allowances is generally incorporated into a casting pattern? Explain
34) What are chills? State their functions?
35) Explain with neat sketches types of gating systems used in casting.
36) What is the benefit of a split pattern over a one piece or solid pattern?
37) What defects are likely to be caused due to (i) Undersized core, (ii) Oversized core?
38) State only properties of core sand.
39) What is a core-print and what is its purpose? Explain with neat sketch any two types of cores.
40) Discuss suitability of casting process over welding process for making reduction gear box body.
41) Compare shell moulding and precision investment casting from the standpoint of process and
products.
42) Explain cupola furnace with neat sketch showing temperature zones and important reactions that
are taking places in it.
43) How do you compare forged components with cast components?
44) With the help of neat sketch, explain the process of preparing a sand mould by the hand moulding
method.
45) Explain the following with neat sketch : (i) Core print (ii) Sweep pattern (iii)Match plate pattern
46) (iv) Draft allowance.
47) State the ingredients of moulding sand and explain the method used for determining the
permeability of any moulding sand.
48) Discuss : (i) Precision investment casting. (ii) Centrifugal casting.
49) List various materials used for pattern and describe it’s merits and demerits.
50) Classify the types of pattern. Explain the skeleton pattern with neat sketch.
51) Describe core making and core materials briefly.
52) Explain “Centrifugal Casting” method with neat sketch along with it’s advantages over
conventional green sand moulding.
53) Describe casting defects stating their causes and remedies.
54) What is pattern? List different types of patterns and explain any two with neat sketch.
55) Explain the following: (i) Rapping allowances (ii) Distortion allowances
56) List factors which affect salvaging of casting. Also list various salvage techniques of casting and
explain any one.
57) Discuss: (i) Shell Moulding (ii) Die Casting
58) Explain the properties of moulding sand.