Engineering Materials MCQ with Answers

11) The ultimate tensile stress of mild steel compared to ultimate compressive stress is

Answer is:

more

12) Tensile strength of a material is obtained by dividing the maximum load during the test by the

Answer is:

original cross-sectional area

13) The impact strength of a material is an index of its

Answer is:

toughness

Explanation:

Toughness: When a huge external force is applied on a metal, the metal will experience fracture. Toughness is the ability of a metal to resist fracture. The ability of a material to resist fracture due to high impact loads, is called toughness.

Hardness: Hardness is the ability of a metal to resist permanent change of shape caused by an external force.

The impact strength of a material is an index of its

14) The Young′s modulus of a wire is defined as the stress which will increase the length of wire compared to its original length

Answer is:

same amount

15) Percentage reduction of area in performing tensile test on cast iron may be of the order of

Answer is:

11) The ultimate tensile stress of mild steel compared to ultimate compressive stress is

more

12) Tensile strength of a material is obtained by dividing the maximum load during the test by the

original cross-sectional area

13) The impact strength of a material is an index of its

toughness

14) The Young′s modulus of a wire is defined as the stress which will increase the length of wire compared to its original length

same amount

15) Percentage reduction of area in performing tensile test on cast iron may be of the order of

0%