Question

1.(a) In Green sand ,green refers to (colour/moisture content) (b) List any two types of defects in casting (c) Hot working operation is carried out -------------recrystallization temperature (d)Hot piercing is used to produce seam less tubes (True/False) 2. What is core? What is the purpose of core 3. List out various types of hand-moulding tools 4. List out the hot-working processes 5. Define cold working. List out any two cold working process? PART – B Instructions: Part B consists of 3 Units. Answer any one full question from each unit. Each question carries 8 marks and may have sub questions. 6.(aExplain Die casting. Write the advantages and disadvantages and its applications. (OR) (b) Explain Centrifugal casting. Write the advantages and disadvantages and its applications. 7.(a)Describe the sand moulding process using a solid pattern (OR) (bExplain the properties of moulding sand 8(a)Explain in detail various types of hot extrusion methods (OR) (b)Write the differences between hot working and cold working​

Answer 1

Answer:

Explanation:

Green sand mould contains 3-6 % of water, due to containing of moisture it is termed as green sand. Green sand has enough strength so that the constructed mould retains its shape. Moisture makes the sand more feasible and 95% reusable.

Answer 2

Explanation:

moisture is refers to green