GATE PI 2005 | Metal Forming Process Question 33 | Metal Forming

GATE PI 2005

MCQ (Single Correct Answer)

-0.6

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.

Which of the statements given above are correct?

$$1,$$ $$2$$ and $$3$$

$$1,$$ $$2$$ and $$4$$

$$1$$ and $$3$$

$$2,$$ $$3$$ and $$4$$

GATE PI 2005

MCQ (Single Correct Answer)

-0.6

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

Both $$A$$ and $$R$$ are individually true and $$R$$ is the correct explanation of $$A$$

Both $$A$$ and $$R$$ are individually true but $$R$$ is not the correct explanation of $$A$$

$$A$$ is true but $$R$$ is false

$$A$$ is false but $$R$$ is true

GATE PI 2005

MCQ (Single Correct Answer)

-0.6

The true stress-true strain curve is given by $$\sigma = 1400\,{\varepsilon ^{0.33}},$$ where the stress $$\sigma $$ is in $$MPa.$$ The true stress at maximum load (in $$MPa$$) is

$$971$$

$$750$$

$$698$$

$$350$$

GATE PI 2005

MCQ (Single Correct Answer)

-0.6

A level having $${90^0}$$ bend is to be produced by drop forging using mild steel bar as raw material. The various operations to be performed on it during forging are:
$$P$$ - Cutting;
$$Q$$ - Bending;
$$R$$ - Fullering;
$$S$$ - Blocking cum finishing;
$$T$$ - Edgering

The correct sequence for performing the operations is:

$$P - Q - R - T - S$$

$$R - T - Q - S - P$$

$$T - R - S - Q - P$$

$$R - Q - T - S - P$$

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