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Test: Cold Working, Recrystallisation, Rolling & Forging - 1


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20 Questions MCQ Test GATE Mechanical (ME) 2023 Mock Test Series | Test: Cold Working, Recrystallisation, Rolling & Forging - 1

Test: Cold Working, Recrystallisation, Rolling & Forging - 1 for Mechanical Engineering 2022 is part of GATE Mechanical (ME) 2023 Mock Test Series preparation. The Test: Cold Working, Recrystallisation, Rolling & Forging - 1 questions and answers have been prepared according to the Mechanical Engineering exam syllabus.The Test: Cold Working, Recrystallisation, Rolling & Forging - 1 MCQs are made for Mechanical Engineering 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Cold Working, Recrystallisation, Rolling & Forging - 1 below.
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Test: Cold Working, Recrystallisation, Rolling & Forging - 1 - Question 1

Which one of the following is the process to refine the grains of metal after it has been distorted by hammering or cold working?

Test: Cold Working, Recrystallisation, Rolling & Forging - 1 - Question 2

Which of the following are the cold working processes?

(1) Forging
(2) Bending
(3) Squeezing 
(4) Pipe Welding
(5) Drawing

Test: Cold Working, Recrystallisation, Rolling & Forging - 1 - Question 3

Which of the following is not improved by cold working of metals?

Test: Cold Working, Recrystallisation, Rolling & Forging - 1 - Question 4

Assertion (A): To obtain large deformations by cold working intermediate annealing is not required.
Reason (R): Cold working is perfol1ned below the recrystallisation temperature of the work material. 

Test: Cold Working, Recrystallisation, Rolling & Forging - 1 - Question 5

Consider the following statements: 
When a metal or alloy is cold worked
1. it is worked below room temperature.
2. it is worked below recrystallisation temperature.
3. its hardness and strength increase.
4. its hardness increases but strength does not increase. 

Q.

Of these correct statements are

Test: Cold Working, Recrystallisation, Rolling & Forging - 1 - Question 6

Assertion (A): In case of hot working of metals, the temperature at which the process is finally stopped should not be above the recrystallisation temperature.
Reason (R): If the process is stopped above the recrystallisation temperature, grain growth will take place again and spoil the attained structure. 

Detailed Solution for Test: Cold Working, Recrystallisation, Rolling & Forging - 1 - Question 6

Should be above the recrystallisation temperature

Test: Cold Working, Recrystallisation, Rolling & Forging - 1 - Question 7

Consider the following statements:
In comparison to hot working, in cold working,
1. higher forces are required
2. no heating is required
3. less ductility is required
4. better surface finish is obtained

Q. Which of the statements given above are correct? 

Detailed Solution for Test: Cold Working, Recrystallisation, Rolling & Forging - 1 - Question 7

Correct Answer :- b

Explanation : Although 1 is also correct but according to given option (b) is the most suitable. 3 is wrong because working more ductility is required.

Test: Cold Working, Recrystallisation, Rolling & Forging - 1 - Question 8

Assertion (A): Cold working of metals results in increase of strength and hardness
Reason (R): Cold working reduces the total number of dislocations per unit volume of the material 

Test: Cold Working, Recrystallisation, Rolling & Forging - 1 - Question 9

Cold working of steel is defined as working 

Test: Cold Working, Recrystallisation, Rolling & Forging - 1 - Question 10

In metals subjected to cold working, strain hardening effect is due to 

Test: Cold Working, Recrystallisation, Rolling & Forging - 1 - Question 11

Specify the sequence correctly 

Test: Cold Working, Recrystallisation, Rolling & Forging - 1 - Question 12

Assertion (A): While rolling metal sheet in rolling mill, the edges are sometimes not straight
and flat but are wavy. [IES-2003]
Reason (R): Non-uniform mechanical properties of the flat material rolled out result in waviness of the edges.

Test: Cold Working, Recrystallisation, Rolling & Forging - 1 - Question 13

Which of the following assumptions are correct for cold rolling?
1. The material is plastic.
2. The arc of contact is circular with a radius greater than the radius of the roll.
3. Coefficient of friction is constant over the arc of contact and acts in one direction
throughout the arc of contact.

Q.

Select the correct answer using the codes given below:Codes:

Test: Cold Working, Recrystallisation, Rolling & Forging - 1 - Question 14

In the rolling process, roll separating force can be decreased by 

Test: Cold Working, Recrystallisation, Rolling & Forging - 1 - Question 15

Consider the following statements:
1. Forging reduces the grain size of the metal, which results in a decrease in strength and toughness.
2. Forged components can be provided with thin sections, without reducing the strength. 

Q.

Which of the statements given above is/are correct?

Test: Cold Working, Recrystallisation, Rolling & Forging - 1 - Question 16

Which one of the following manufacturing processes requires the provision of ‘gutters’? 

Detailed Solution for Test: Cold Working, Recrystallisation, Rolling & Forging - 1 - Question 16

Closed die forging requires the provision of flash gutters to provide space for excess
material and ensure complete and defect free forged part.

Test: Cold Working, Recrystallisation, Rolling & Forging - 1 - Question 17

In open-die forging, disc of diameter 200 mm and height 60 mm is compressed without any barreling effect. The final diameter of the disc is 400 mm. The true strain is

Detailed Solution for Test: Cold Working, Recrystallisation, Rolling & Forging - 1 - Question 17

True strain

negative sign indicates compressive strain.

Test: Cold Working, Recrystallisation, Rolling & Forging - 1 - Question 18

Consider the following statements:
Roll forces in rolling can be reduced by
1. reducing friction
2. using large diameter rolls to increase the contact area.
3. taking smaller reductions per pass to reduce the contact area. 

Q.

Which of the statements given above are correct?

Detailed Solution for Test: Cold Working, Recrystallisation, Rolling & Forging - 1 - Question 18

Use small dia rolls to reduce Roll force

Test: Cold Working, Recrystallisation, Rolling & Forging - 1 - Question 19

Assertion (A): Forging dies are provided with taper or draft angles on vertical surfaces.
Reason (R): It facilitates complete filling of die cavity and favourable grain flow. 

Detailed Solution for Test: Cold Working, Recrystallisation, Rolling & Forging - 1 - Question 19

R is false; it facilitates removal of product from die.

Test: Cold Working, Recrystallisation, Rolling & Forging - 1 - Question 20

In rolling a strip between two rolls, the position of the neutral point in the arc of contact doesnot depend on 

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