Mechanical Properties - 2 - Free MCQ Practice Test with solutions, GATE

Superplastic behaviour is observed in

It refers to the capability of some materials to undergo very large elongation before failure which can be of the order of few hundered percent to as much as 200 percent. This is in context of

Match the List-I (Property) with List-ll (Testing machine):
List-I
A. Tensile strength
B. Impact strength
C. Bending strength
D. Fatigue strength
List-ll
1. Rotating bending machine
2. Three-point loading machine
3. Universal testing machine
4. Izod testing machine

During tensile-testing of a specimen using a Universal Testing Machine, the parameters actually measured include.

Increasing temperature has the following effects on stress-strain curves:
1. It increases ductility and toughness.
2. It increases ductility and reduces toughness,
3. It lowers yield stress and modulus of elasticity.
4. It increases yield stress but modulus of elasticity remains unaffected.
Which of the above statements are true?

Which of the following phenomenon is not used in the measurement of hardness?

Which hardness method can measure hardness of a grain?

The fatigue strength of mild steel is

In a tensile specimen, the elongation at the time of fracture is

For a tensile test, it can be demonstrated that necking begins at