1.
Ferromagnetic alpha iron exists in temperature range of________________?

A. Below 723°C

B. 770 – 910°C

C. 910-1440°C

D. 1400-1539°C

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2.
A reversible change in the atomic structure of steel with corresponding change in the properties is known as___________________?

A. Molecular change

B. Physical change

C. Allotropic change

D. Solidus change

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3.
The crystal of alpha iron is ____________________?

A. Body centred cubic

B. Face centred cubic

C. Hexagonal close packed

D. Cubic structure

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4.
For the allotropic forms of iron, the points of arrest are __________________?

A. The points where no further change oc-curs

B. Constant for all metals

C. The points where there is no further flow of metal

D. The points of discontinuity

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5.
The percentage of carbon in grey iron castings usually varies between __________________?

A. 0.5 to 1%

B. 1 – 2%

C. 2.5 to 4.5%

D. 5 – 7%

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6.
The unique property of cast iron is its high ___________________?

A. Malleability

B. Ductility

C. Surface finish

D. Damping characteristics

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7.
In grey cast iron, carbon is present in the form of____________________?

A. Cementite

B. Free carbon

C. Flakes

D. Spheroids

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8.
In malleable iron, carbon is present in the form of___________________?

A. Cementite

B. Free carbon

C. Flakes

D. Spheroids

E. Nodular aggregates of graphite

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9.
The following types of materials are usually the most ductile__________________?

A. Face-centred cubic lattice

B. Body-centred cubic lattice

C. Hexagonal close-packed lattice

D. All of the above

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10.
Sulphur in pig iron tends to make it___________________?

A. Hard

B. Soft

C. Ductile

D. Tough

Answer Discus (0)

11.
Iron is ____________________?

A. Paramagnetic

B. Ferromagnetic

C. Ferroelectric

D. Dielectric

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12.
Chilled cast iron has____________________?

A. No graphite

B. A very high percentage of graphite

C. A low percentage of graphite

D. Graphite as its basic constituent of composition

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13.
White cast iron contains carbon in the form of__________________?

A. Free carbon

B. Graphite

C. Cementite

D. White carbon

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14.
An important property of high silicon (12 – 18%) cast iron is the high__________________?

A. Tenacity

B. Brittleness

C. Plasticity

D. Corrosion resistance

E. Hardness

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15.
Steel contains____________________?

A. 80% or more iron

B. 50% or more iron

C. Alloying elements like chromium, tungsten nickel and copper

D. Elements like phosphorus, sulphur and silicon in varying quantities

Answer Discus (0)

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General Subjects

Business

Engineering Materials Mcqs

Computer MCQS

Sciences MCQS

1. Ferromagnetic alpha iron exists in temperature range of________________?

Answer & Solution

2. A reversible change in the atomic structure of steel with corresponding change in the properties is known as___________________?

Answer & Solution

3. The crystal of alpha iron is ____________________?

Answer & Solution

4. For the allotropic forms of iron, the points of arrest are __________________?

Answer & Solution

5. The percentage of carbon in grey iron castings usually varies between __________________?

Answer & Solution

6. The unique property of cast iron is its high ___________________?

Answer & Solution

7. In grey cast iron, carbon is present in the form of____________________?

Answer & Solution

8. In malleable iron, carbon is present in the form of___________________?

Answer & Solution

9. The following types of materials are usually the most ductile__________________?

Answer & Solution

10. Sulphur in pig iron tends to make it___________________?

Answer & Solution

11. Iron is ____________________?

Answer & Solution

12. Chilled cast iron has____________________?

Answer & Solution

13. White cast iron contains carbon in the form of__________________?

Answer & Solution

14. An important property of high silicon (12 – 18%) cast iron is the high__________________?

Answer & Solution

15. Steel contains____________________?

Answer & Solution

Engineering MCQS

General Subjects MCQS

1.
Ferromagnetic alpha iron exists in temperature range of________________?

2.
A reversible change in the atomic structure of steel with corresponding change in the properties is known as___________________?

3.
The crystal of alpha iron is ____________________?

4.
For the allotropic forms of iron, the points of arrest are __________________?

5.
The percentage of carbon in grey iron castings usually varies between __________________?

6.
The unique property of cast iron is its high ___________________?

7.
In grey cast iron, carbon is present in the form of____________________?

8.
In malleable iron, carbon is present in the form of___________________?

9.
The following types of materials are usually the most ductile__________________?

10.
Sulphur in pig iron tends to make it___________________?

11.
Iron is ____________________?

12.
Chilled cast iron has____________________?

13.
White cast iron contains carbon in the form of__________________?

14.
An important property of high silicon (12 – 18%) cast iron is the high__________________?

15.
Steel contains____________________?