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Mechanical Engineering

Casting MCQ (Interview-Exam) Question-Answer – Difference between Pattern and Casting

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Casting MCQ (Interview-Exam) Question-Answer – Difference between Pattern and Casting
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Q.1 Which of the following carries the mould cavity where the metal is to be poured?

       A. Pattern

       B. Core

       C. Casting

       D. Sand

Ans : Pattern


Q.2 Which of the following statement is true?

       A. Pattern is the replica of the casting object

       B. Molten material is casted into the casting cavity

       C. Casting is the replica of the object to be cast

       D. Casting and the pattern are same things

Ans : Pattern is the replica of the casting object


Q.3 The following diagram shows the application of which of the allowances given to a pattern?

The following diagram shows the application of which of the allowances given to a pattern?

       A. Draft allowance

       B. Distortion allowance

       C. Shrinkage allowance

       D. Shake allowance

Ans : Draft allowance


Q.4 Which of the following is ‘not’ an allowance given to the pattern for casting?

       A. Draft

       B. Machining

       C. Shrinkage

       D. Hole

Ans : Hole


Q.5 The quality of the final product is not dependent on _______________.

       A. Allowance provided to the pattern

       B. The metal used in Casting

       C. Method of withdrawal of pattern

       D. The complexity of the casting

Ans : The metal used in Casting


Q.6 What will be the machining allowance for a bore of a 405mm cast iron object to be casted?

       A. 2.0mm

       B. 5.0mm

       C. 1.0mm

       D. 3.0mm

Ans : 5.0mm


Q.7 What is the function of cores in the casting process?

       A. To provide differential cooling rates at specific portions

       B. For ease of flow of the molten material

       C. To support the pattern

       D. To make holes and cavities

Ans : To make holes and cavities


Q.8 The life of a pattern is most likely to depend upon which of the following term?

       A. Type of cooling rate of the casting

       B. Size of the pattern

       C. Number of castings produced

       D. Size of the casting

Ans : Number of castings produced


Q.9 A draft allowance is provided to ___________

       A. Only the interior dimensions

       B. Only the dimensions that are perpendicular to the parting plane

       C. All linear faces

       D. Only the exterior dimensions

Ans : Only the dimensions that are perpendicular to the parting plane


Q.10 Which of the following is ‘not’ an advantage of the usage of pattern in a casting of metals?

       A. It is cost efficient and profitable for mass production

       B. Cores in the pattern could be used to decrease the amount of machining done for making cavities

       C. Using patterns to cast objects, less time is consumed for mass production

       D. Production of the pattern requires extra effort to cast the object

Ans : Production of the pattern requires extra effort to cast the object


 

“pattern” and “casting” refer to distinct processes related to the manufacturing of metal components, often using foundry techniques. Let’s explore the difference between pattern and casting:

  1. Pattern:
    • A pattern is a replica or model of the final metal component that needs to be cast.
    • It is typically made of wood, metal, or other materials with good dimensional stability.
    • The pattern is used to create a mold cavity into which molten metal will be poured to produce the final casting.
    • Patterns are designed to include the necessary features, such as allowances for shrinkage and gating systems for the molten metal to flow into the mold.
  2. Casting:
    • Casting is the process of forming a metal component by pouring molten metal into a mold cavity and allowing it to solidify.
    • The mold cavity is created by placing the pattern in a mold material, such as sand, which is then compacted around the pattern to form the mold.
    • Once the mold is prepared, molten metal is poured into it, filling the void left by the pattern.
    • After the metal solidifies, the mold is opened, and the casting is removed. The casting is then cleaned, finished, and often subjected to additional processes like heat treatment or machining.

A pattern is a model used to create a mold, while casting is the actual process of pouring molten metal into that mold to produce a final component. The combination of pattern and casting is a common method for producing complex metal parts with high accuracy and relatively low cost in various industries, including automotive, aerospace, and machinery manufacturing.

Casting Difference between Pattern and Casting Mechanical Engineering Mechanical Engineering MCQs Pattern

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