Engineering Materials Mcqs
This set of Mechanical engineering Multiple Choice Questions & Answers (MCQs) focuses on study of “ Engineering Materials ”. These questions are chosen from a collection of most authoritative and best reference books on Mechanical engineering. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, University and College entrance exams, Jobs and interviews. One should practice our MCQS to assimilate Engineering Materials comprehensively.
2. A reversible change in the atomic structure of steel with corresponding change in the properties is known as___________________?
Molecular change
Physical change
Allotropic change
Solidus change
Answer & Solution
No Solution for this Answer..! Report or Discus this Question
3. The crystal of alpha iron is ____________________?
Body centred cubic
Face centred cubic
Hexagonal close packed
Cubic structure
Answer & Solution
No Solution for this Answer..! Report or Discus this Question
4. For the allotropic forms of iron, the points of arrest are __________________?
The points where no further change oc-curs
Constant for all metals
The points where there is no further flow of metal
The points of discontinuity
Answer & Solution
No Solution for this Answer..! Report or Discus this Question
5. The percentage of carbon in grey iron castings usually varies between __________________?
0.5 to 1%
1 – 2%
2.5 to 4.5%
5 – 7%
Answer & Solution
No Solution for this Answer..! Report or Discus this Question
6. The unique property of cast iron is its high ___________________?
Malleability
Ductility
Surface finish
Damping characteristics
Answer & Solution
No Solution for this Answer..! Report or Discus this Question
7. In grey cast iron, carbon is present in the form of____________________?
Cementite
Free carbon
Flakes
Spheroids
8. In malleable iron, carbon is present in the form of___________________?
Cementite
Free carbon
Flakes
Spheroids
Nodular aggregates of graphite
Answer & Solution
No Solution for this Answer..! Report or Discus this Question
9. The following types of materials are usually the most ductile__________________?
Face-centred cubic lattice
Body-centred cubic lattice
Hexagonal close-packed lattice
All of the above
Answer & Solution
No Solution for this Answer..! Report or Discus this Question
10. Sulphur in pig iron tends to make it___________________?
Hard
Soft
Ductile
Tough
11. Iron is ____________________?
Paramagnetic
Ferromagnetic
Ferroelectric
Dielectric
Answer & Solution
No Solution for this Answer..! Report or Discus this Question
12. Chilled cast iron has____________________?
No graphite
A very high percentage of graphite
A low percentage of graphite
Graphite as its basic constituent of composition
Answer & Solution
No Solution for this Answer..! Report or Discus this Question
13. White cast iron contains carbon in the form of__________________?
Free carbon
Graphite
Cementite
White carbon
Answer & Solution
No Solution for this Answer..! Report or Discus this Question
14. An important property of high silicon (12 – 18%) cast iron is the high__________________?
Tenacity
Brittleness
Plasticity
Corrosion resistance
Hardness
Answer & Solution
No Solution for this Answer..! Report or Discus this Question
15. Steel contains____________________?
80% or more iron
50% or more iron
Alloying elements like chromium, tungsten nickel and copper
Elements like phosphorus, sulphur and silicon in varying quantities
Answer & Solution
No Solution for this Answer..! Report or Discus this Question