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ESE 2019: Manufacturing Quiz-3

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Question 1

A: Patterns are made larger than the size required considering shrinkage allowance.
R: The grey cast iron has negative coefficient of shrinkage.

Question 2

Out of following cold rolled shapes, which can be cold rolled without having uniform cross-section and transverse dimension?
i. full-hard
ii. half-hard
iii. quarter-hard
iv. skin-rolled

Question 3

Which limit corresponds to maximum material condition of shaft and hole?

Question 4

Which product graph pattern shows S shaped life cycle curve when sales and profits with respect to time are plotted?

Question 5

Direction: Each of the question consist of two statements, one labeled as the ‘Statement (I)’ and the other as ‘Statement (II)’. Examine these two statements carefully and select the answer to these items using the codes given below:
Statement (I): Employing the extrusion process is not economical in case of large billets.
Statement (II): A significant part of the press capacity is lost overcoming frictional resistance between workpiece and cylinder wall during the extrusion process.

Question 6

Consider the following advantages of die casting over sand casting
1. Rapidity of the process
2. Smooth surface
3. Strong dense metal structure
Which of these statements are correct?

Question 7

Statements (I): The deflection of Arc from its intended path is called ‘Arc blow’.
Statements (II): The chances of Arc blow is common in A.C. arc welding.

Question 8

Assertion (A): Low-carbon steel has high weldability and is more easily welded.
Reason (R): Higher carbon contents tend to soften the welded joints resulting in development of cracks.

Question 9

Consider the following statements in respect of the oxidizing flame due to excess of oxygen in welding:
1. At high temperature, it combines with many metals to form hard and brittle oxides.
2. It causes the weld bead and the surrounding area to have a scummy appearance.
3. It has good welding effect in welding of copper-base metal.
Which of the above statements are correct?

Question 10

Consider the following statements with respect to the effects of a large nose radius on the tool
1. It deteriorates surface finish.
2. It increases the possibility of chatter.
3. It improves tool life.
Which of these statements is/are correct?
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