ME8593 DME WEEKLY TEST 1 QUIZ

Hooke’s law holds good up to

• (a) breaking point

• (b) yield point

• (c) elastic limit

• d) plastic limit

The ratio of tensile stress to tensile strain within elastic limit is called

• (a) bulk modulus

• (b) Poisson’s ratio

• (c) modulus of rigidity

• (d) modulus of elasticity

The ratio of shear stress to shear strain is called

• (a) bulk modulus

• (b) Poisson’s ratio

• (c) modulus of rigidity

• (d) modulus of elasticity

The modulus of elasticity of carbon steel is

• (a) 207 000 N/mm2

• (b) 100 000 N/mm2

• (c) 50 000 N/mm2

• (d) 80 000 N/mm2

The modulus of elasticity of grey cast iron is

• (a) 207 000 N/mm2

• (b) 100 000 N/mm2

• (c) 50 000 N/mm2

• (d) 80 000 N/mm2

The modulus of rigidity of carbon steel is

• (a) 207 000 N/mm2

• (b) 100 000 N/mm2

• (c) 50 000 N/mm2

• (d) 80 000 N/mm2

The modulus of rigidity of grey cast iron is

• (a) 207 000 N/mm2

• (b) 100 000 N/mm2

• (c) 40 000 N/mm2

• (d) 80 000 N/mm2

The Poisson’s ratio of grey cast iron is

• (a) 0.40

• (b) 0.29

• (c) 0.21

• (d) 0.75

The Poisson’s ratio of carbon steels is

• (a) 0.40

• (b) 0.29

• (c) 0.21

• (d) 0.75

Within elastic limit, the stress is

• (a) equal to strain

• (b) inversely proportional to strain

• (c) directly proportional to strain

• (d) directly proportional to the square of strain