Mechanical behaviour of Materials

• Materials & Manufacturing
• HBO
• Studiejaar 2

Quiz

Mechanical behaviour of Materials

What is the point P shown in the stress-strain curve?

1. Lower elastic limit
2. Elastic limit
3. Proportionality limit
4. breaking point

The points on the curve comes in the given order,
A. proportionality limit, B. elastic limit
C. upper yield point, D. lower yield point
E. yield plateau, F. ultimate point, G. breaking point.

1. Yes
2. No

Where is the necking region
in stress-strain curve?

1. Between lower & upper yield point
2. Between plastic & elastic limit
3. Between ultimate point & rupture
4. Between Ultimate & initial point

what property smartphone glass should have?

1. Higher hardness
2. higher Young's modulus
3. higher fracture toughness
4. all of the above

Residual stresses can also be calculated the same way as the stresses due to the external loads is calculated.

1. True
2. false

in what terms, fatigue life is measured?

1. Time of failures
2. Number of cycles of failure
3. Stress of failure
4. appearance of fracture

Fatigue curves are popularly known as __________ curves.

1. S-R
2. R-N
3. N-R
4. S-N

What is the reason for fatigue failure?

1. Movement of dislocations
2. Submicroscopic cracks
3. Dynamic recovery
4. Continuous stress

Tensile test can be performed on

1. Impact testing machine
2. Universal testing machine
3. Rockwell tester
4. Brinell tester

The property of a material that resists penetration or indentation by means of abrasion or scratching is known as

1. Strength
2. hardness
3. toughness
4. brittleness

The impact test is done to test _____ of a material

1. Strength
2. Ductility
3. Toughness
4. Hardness