1
GATE PI 2003
MCQ (Single Correct Answer)
+2
-0.6
Cold working produces the following effects

$$1.$$$$\,\,\,\,\,\,\,\,\,\,\,\,\,\,$$ Stress are set up in the material
$$2.$$$$\,\,\,\,\,\,\,\,\,\,\,\,\,\,$$ Grain structure get distorted
$$3.$$$$\,\,\,\,\,\,\,\,\,\,\,\,\,\,$$ Strength and hardness of the metal are decreased
$$4.$$$$\,\,\,\,\,\,\,\,\,\,\,\,\,\,$$ Surface finish is reduced

A
$$1$$ & $$2$$
B
$$1,$$ $$2$$ & $$3$$
C
$$3$$ & $$4$$
D
$$1$$ & $$4$$
2
GATE PI 2003
MCQ (Single Correct Answer)
+2
-0.6
Consider the following steps in forging a connecting rod from the bar stock

$$1.$$ blocking $$\,\,\,\,\,\,\,\,\,$$ $$\,\,\,\,\,\,\,\,\,$$ $$\,\,\,\,\,\,\,\,\,$$$$2.$$ trimming
$$3.$$ finishing$$\,\,\,\,\,\,\,\,\,$$ $$\,\,\,\,\,\,\,\,\,$$ $$\,\,\,\,\,\,\,\,\,$$ $$4.$$ edging

Select the correct sequence of these operations using the codes given below

A
$$1-2-3-4$$
B
$$2-3-4-1$$
C
$$3-4-1-2$$
D
$$4-1-3-2$$
3
GATE PI 1994
MCQ (Single Correct Answer)
+2
-0.6
An annealed copper wire of $$25 mm$$ diameter is drawn into a wire of $$5$$ $$mm$$ dia. The average yield stress in this operation if the flow curve of the material is given
$$\sigma = 315{ \in ^{0.54}}\,MPa$$
A
$$592$$ $$MPa$$
B
$$458$$ $$MPa$$
C
$$342$$ $$MPa$$
D
None
4
GATE PI 1992
Fill in the Blanks
+2
-0
To stress relive a cold worked steel part, it is heated to a temp close to ..... A....... and grains obtained after cooling are........ B.........
A. Lower critical temp/ upper critical temp
B. Fine / coarser
EXAM MAP