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# Cold Working, Recrystallisation, Rolling And Forging - MCQ Test 1

## 20 Questions MCQ Test RRB JE for Mechanical Engineering | Cold Working, Recrystallisation, Rolling And Forging - MCQ Test 1

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This mock test of Cold Working, Recrystallisation, Rolling And Forging - MCQ Test 1 for Mechanical Engineering helps you for every Mechanical Engineering entrance exam. This contains 20 Multiple Choice Questions for Mechanical Engineering Cold Working, Recrystallisation, Rolling And Forging - MCQ Test 1 (mcq) to study with solutions a complete question bank. The solved questions answers in this Cold Working, Recrystallisation, Rolling And Forging - MCQ Test 1 quiz give you a good mix of easy questions and tough questions. Mechanical Engineering students definitely take this Cold Working, Recrystallisation, Rolling And Forging - MCQ Test 1 exercise for a better result in the exam. You can find other Cold Working, Recrystallisation, Rolling And Forging - MCQ Test 1 extra questions, long questions & short questions for Mechanical Engineering on EduRev as well by searching above.
QUESTION: 1

Solution:
QUESTION: 2

Solution:
QUESTION: 3

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

Solution:
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.

Solution:
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

Solution:
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.

Solution:

Should be above the recrystallisation temperature

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?

Solution:

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.

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

Solution:
QUESTION: 9

Cold working of steel is defined as working

Solution:
QUESTION: 10

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

Solution:
QUESTION: 11

Specify the sequence correctly

Solution:
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.

Solution:
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:

Solution:
QUESTION: 14

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

Solution:
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?

Solution:
QUESTION: 16

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

Solution:

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

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

Solution:

True strain

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?

Solution:

Use small dia rolls to reduce Roll force

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.

Solution:

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

QUESTION: 20

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

Solution: