1
GATE PI 1990
MCQ (Single Correct Answer)
+5
-1.5
A steel wire of length $$100$$ $$m$$ and diameter $$12.214$$ $$mm$$ is drawn to a final diameter of $$10mm.$$ Tensile tests of specimen made before and after the drawing operation gave yield stress as $$200$$ $$MPa$$ and $$400$$ $$MPa$$ respectively,

The length of drawn wire is

A
$$100$$ $$m$$
B
$$125$$ $$m$$
C
$$150$$ $$m$$
D
$$175$$ $$m$$
2
GATE PI 1990
MCQ (Single Correct Answer)
+5
-1.5
A steel wire of length $$100$$ $$m$$ and diameter $$12.214$$ $$mm$$ is drawn to a final diameter of $$10mm.$$ Tensile tests of specimen made before and after the drawing operation gave yield stress as $$200$$ $$MPa$$ and $$400$$ $$MPa$$ respectively,

The yield stress of the steel at a true stain $$0.2,$$ by assuming linear strain hardening law.

A
$$200$$ $$MPa$$
B
$$300$$ $$MPa$$
C
$$400$$ $$MPa$$
D
$$600$$ $$MPa$$
3
GATE PI 1990
MCQ (Single Correct Answer)
+2
-0.6
Calculate the smallest punch diameter that can be designed for piercing sheet metal strip with the following data. Crushing strength of the punch material is $$1500$$ $$MPa.$$ Thickness of the sheet is $$2$$ $$mm,$$ factor of safety is $$3,$$ and shear strength of the sheet material $$500$$ $$MPa$$ is
A
$$2mm$$
B
$$6mm$$
C
$$8mm$$
D
$$24mm$$
4
GATE PI 1990
MCQ (Single Correct Answer)
+2
-0.6
Assertion (A): Basic hole system is advocated by Indian Standards for fit design
Explanation (E): Holes can be produced to any size.
A
Both $$A$$ and $$E$$ are correct & $$E$$ explanation $$A$$
B
Both $$A$$ and $$E$$ are true but $$E$$ not explains $$A$$
C
$$A$$ is true but $$E$$ is false
D
$$A$$ is false but $$E$$ is true.
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