Mechanical Engineering Objective | Mechanical Engineering Online Test

1. The impact strength of an material is an index of its

a. Toughness

b. Tensile strength

c. Capability of being cold worked

d. Hardness

e. Fatigue strength

Answer:

Toughness


 

2. If a material expands freely due to heating, it will develop

a. Thermal stress

b. Tensile stress

c. Bending

d. Compressive stress

e. No stress

Answer:

No stress


 

3. Ductility of material can be defined as

a. Ability to undergo large permanent deformation in compression

b. Ability to recover its original form

c. Ability to undergo large permanent deformation in tension

d. All of the above

e. None of the above

Answer:

Ability to undergo large permanent deformation in compression


 

4. Cast iron is characterized by minimum of following % of carbon

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a. 0.2%

b. 0.8%

c. 1.3%

d. 2%

e. None of the above

Answer:

2%


 

5. Inconel is an alloy of

a. Nickel, chromium and iron

b. Nickel and copper

c. Nickel and chromium

d. Nickel and zinc

e. Nickel and lead

Answer:

Nickel, chromium and iron


 

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2 comments

  • the answer for ductility is : ability to undergo large permanent deformation in tension ( like drawing of thin wires)
    though ductility and malleability are use synonymously, there is a small technical difference between them in that malleability is the ability to undergo large permanent deformation in compression ( like flattening of a metal to sheet)..

  • 3. Ductility of material can be defined as

    c. Ability to undergo large permanent deformation in tension

    this is best answer i can prefer…

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