Decomposition of cementite to form ferrite and graphite is known as _______

Prevention of growth of cast irons

What_is_the_temperature_in_a_core_box_typically?$

200¬¨¬®‚Äö√†√ªC ‚Äö√Ñ√∂‚àö√ë‚àö¬® 270¬¨¬®‚Äö√†√ªC

120¬¨¬®‚Äö√†√ªC ‚Äö√Ñ√∂‚àö√ë‚àö¬® 160¬¨¬®‚Äö√†√ªC

180¬¨¬®‚Äö√†√ªC ‚Äö√Ñ√∂‚àö√ë‚àö¬® 260¬¨¬®‚Äö√†√ªC

200¬¨¬®‚Äö√†√ªC ‚Äö√Ñ√∂‚àö√ë‚àö¬® 270¬¨¬®‚Äö√†√ªC

290¬¨¬®‚Äö√†√ªC ‚Äö√Ñ√∂‚àö√ë‚àö¬® 350¬¨¬®‚Äö√†√ªC

Decomposition of cementite to form ferrite and graphite is known as ______?

Prevention of growth of cast irons

At what temperature does pure iron turn into FCC structure?

810 ¬¨¬®‚Äö√†√ªC

800 ¬¨¬®‚Äö√†√ªC

900 ¬¨¬®‚Äö√†√ªC

910 ¬¨¬®‚Äö√†√ªC

810 ¬¨¬®‚Äö√†√ªC

42 + Mcqs in Cast Irons in Engineering Materials Metallurgy Page 1 McqOptions

1.	What is the effect of Nickel on cast irons?
A.	Stabilizes carbides
B.	Increases hardness
C.	Refines grain structure
D.	Improves corrosion resistance
Answer» D. Improves corrosion resistance

Discussion

2.	How are malleable cast irons designated for different grades?
A.	By tensile strength
B.	By six or seven-digit numbers
C.	By five-digit numbers
D.	By alphabets
Answer» D. By alphabets

Discussion

3.	Which of the following cast irons cannot be machined?
A.	White cast iron
B.	Grey cast iron
C.	Malleable cast iron
D.	Spheroidal graphite cast iron
Answer» B. Grey cast iron

Discussion

4.	Decomposition of cementite to form ferrite and graphite is known as _______
A.	Decomposition of cast irons
B.	Production of cast irons
C.	Growth of cast irons
D.	Prevention of growth of cast irons
Answer» D. Prevention of growth of cast irons

Discussion

5.	What is the form graphite structure in ductile cast iron?
A.	Spheroidal
B.	Nodular
C.	Flakes
D.	Layers
Answer» C. Flakes

Discussion

6.	In malleable cast iron, the graphite turns into spheroidal particles.
A.	True
B.	False
Answer» B. False

Discussion

7.	Which of the following can be carbon composition of cast iron?
A.	1%
B.	1.5%
C.	0.5%
D.	2.5%
Answer» E.

Discussion

8.	What is the temperature in a core box typically?
A.	120°C – 160°C
B.	180°C – 260°C
C.	200°C – 270°C
D.	290°C – 350°C
Answer» C. 200°C – 270°C

Discussion

9.	Which of the following materials cannot be used for making a core box?
A.	Aluminium
B.	Steel
C.	Zinc
D.	Cast iron
Answer» D. Cast iron

Discussion

10.	What is the tensile strength of thick gray cast iron?
A.	71 MPa
B.	83 MPa
C.	95 MPa
D.	107 MPa
Answer» C. 95 MPa

Discussion

11.	What would be the tensile strength of gray cast iron of class 20?
A.	120 MPa
B.	163 MPa
C.	138 MPa
D.	152 MPa
Answer» D. 152 MPa

Discussion

12.	Presence of which material in a gray cast iron causes reduced ductility?
A.	Graphite
B.	Aluminium
C.	Coke
D.	Zinc
Answer» B. Aluminium

Discussion

13.	WHICH_OF_THE_FOLLOWING_CAST_IRONS_CANNOT_BE_MACHINED??$
A.	White cast iron
B.	Grey cast iron
C.	Malleable cast iron
D.	Spheroidal graphite cast iron
Answer» B. Grey cast iron

Discussion

14.	IN_MALLEABLE_CAST_IRON,_THE_GRAPHITE_TURNS_INTO_SPHEROIDAL_PARTICLES.?$
A.	True
B.	False
Answer» B. False

Discussion

15.	WHICH_OF_THE_FOLLOWING_MATERIALS_CANNOT_BE_USED_FOR_MAKING_A_CORE_BOX??$
A.	Aluminium
B.	Steel
C.	Zinc
D.	Cast iron
Answer» D. Cast iron

Discussion

16.	What is the effect of Nickel on cast irons?$
A.	Stabilizes carbides
B.	Increases hardness
C.	Refines grain structure
D.	Improves corrosion resistance
Answer» D. Improves corrosion resistance

Discussion

17.	How are malleable cast irons designated for different grades?$
A.	By tensile strength
B.	By six or seven-digit numbers
C.	By five-digit numbers
D.	By alphabets
Answer» D. By alphabets

Discussion

18.	What_is_the_form_graphite_structure_in_ductile_cast_iron?$
A.	Spheroidal
B.	Nodular
C.	Flakes
D.	Layers
Answer» C. Flakes

Discussion

19.	What_is_the_temperature_in_a_core_box_typically?$
A.	120¬¨¬®‚Äö√†√ªC ‚Äö√Ñ√∂‚àö√ë‚àö¬® 160¬¨¬®‚Äö√†√ªC
B.	180¬¨¬®‚Äö√†√ªC ‚Äö√Ñ√∂‚àö√ë‚àö¬® 260¬¨¬®‚Äö√†√ªC
C.	200¬¨¬®‚Äö√†√ªC ‚Äö√Ñ√∂‚àö√ë‚àö¬® 270¬¨¬®‚Äö√†√ªC
D.	290¬¨¬®‚Äö√†√ªC ‚Äö√Ñ√∂‚àö√ë‚àö¬® 350¬¨¬®‚Äö√†√ªC
Answer» C. 200¬¨¬®‚Äö√†√ªC ‚Äö√Ñ√∂‚àö√ë‚àö¬® 270¬¨¬®‚Äö√†√ªC

Discussion

20.	What is the defining property of Wrought Irons?
A.	High carbon
B.	Low carbon
C.	No carbon
D.	Completely carbon-filled
Answer» C. No carbon

Discussion

21.	Which of these are applications of grey cast iron?
A.	Camshafts, engine blocks
B.	Wear plates, pump linings
C.	Brake shoes, pedals
D.	Gears, rocker arms
Answer» B. Wear plates, pump linings

Discussion

22.	Due to the presence of which of the following does white cast iron appear white?
A.	Pearlite
B.	Ledeburite
C.	Martensite
D.	Cementite
Answer» E.

Discussion

23.	Up to what thickness can hot box process can be used for production?
A.	10 mm- 40 mm
B.	30 mm- 50 mm
C.	40 mm- 80 mm
D.	70 mm- 100 mm
Answer» E.

Discussion

24.	Decomposition of cementite to form ferrite and graphite is known as ______?
A.	Decomposition of cast irons
B.	Production of cast irons
C.	Growth of cast irons
D.	Prevention of growth of cast irons
Answer» D. Prevention of growth of cast irons

Discussion

25.	Which of the following alloying element is added as a degasser?
A.	Silicon
B.	Sulphur
C.	Nickel
D.	Titanium
Answer» E.

Discussion

26.	Shell molding process is a costly process for gray iron castings.
A.	True
B.	False
Answer» C.

Discussion

27.	What is the effect of phosphorus and sulphur in cast irons?
A.	Induces brittleness
B.	Increases strength
C.	Destabilizes cementite
D.	No effect
Answer» B. Increases strength

Discussion

28.	Which of the following alloying element refines pearlite structure?
A.	Silicon
B.	Sulphur
C.	Nickel
D.	Titanium
Answer» D. Titanium

Discussion

29.	Green sand molding provides the best surface finish.
A.	True
B.	False
Answer» C.

Discussion

30.	An iron with high-silicon content is a _______
A.	White iron
B.	Grey iron
C.	Malleable iron
D.	Pig iron
Answer» C. Malleable iron

Discussion

31.	Which of the following alloying element increase hardness?
A.	Silicon
B.	Sulphur
C.	Nickel
D.	Titanium
Answer» C. Nickel

Discussion

32.	Up to what mass of gray cast irons can shell molds take?
A.	300 kg
B.	400 kg
C.	500 kg
D.	600 kg
Answer» D. 600 kg

Discussion

33.	Which element causes cementite to behave in a stable manner?
A.	Silicon
B.	Sulphur
C.	Manganese
D.	Carbon
Answer» C. Manganese

Discussion

34.	Which of the following alloying element forces the carbon out of the solution?
A.	Silicon
B.	Sulphur
C.	Nickel
D.	Titanium
Answer» B. Sulphur

Discussion

35.	If the iron surface contains graphite, it is known as ________
A.	Alloy cast iron
B.	White iron
C.	Grey iron
D.	Spheroidal graphite
Answer» D. Spheroidal graphite

Discussion

36.	At what temperature does pure iron turn into FCC structure?
A.	800 ¬¨¬®‚Äö√†√ªC
B.	900 ¬¨¬®‚Äö√†√ªC
C.	910 ¬¨¬®‚Äö√†√ªC
D.	810 ¬¨¬®‚Äö√†√ªC
Answer» D. 810 ¬¨¬®‚Äö√†√ªC

Discussion

37.	What is the tensile strength of a thick gray cast iron?
A.	71 MPa
B.	83 MPa
C.	95 MPa
D.	107 MPa
Answer» C. 95 MPa

Discussion

38.	Iron obtained from broken ______ is known as white iron.
A.	Cementite
B.	Graphite
C.	Pearlite
D.	Bainite
Answer» B. Graphite

Discussion

39.	Cast iron tends to be brittle.
A.	True
B.	False
Answer» B. False

Discussion

40.	What would be the tensile strength of a gray cast iron of class 20?
A.	120 MPa
B.	163 MPa
C.	138 MPa
D.	152 MPa
Answer» D. 152 MPa

Discussion

41.	Cast iron is a _____ alloy.
A.	Eutectic
B.	Eutectoid
C.	Peritectic
D.	Peritectoid
Answer» B. Eutectoid

Discussion

42.	How much carbon is present in cast irons?
A.	Less than 0.05%
B.	Up to 1.5%
C.	1.5% to 2%
D.	More than 2%
Answer» E.

Discussion

Explore topic-wise MCQs in Engineering Materials Metallurgy.

What is the effect of Nickel on cast irons?

How are malleable cast irons designated for different grades?

Which of the following cast irons cannot be machined?

Decomposition of cementite to form ferrite and graphite is known as _______

What is the form graphite structure in ductile cast iron?

In malleable cast iron, the graphite turns into spheroidal particles.

Which of the following can be carbon composition of cast iron?

What is the temperature in a core box typically?

Which of the following materials cannot be used for making a core box?

What is the tensile strength of thick gray cast iron?

What would be the tensile strength of gray cast iron of class 20?

Presence of which material in a gray cast iron causes reduced ductility?

WHICH_OF_THE_FOLLOWING_CAST_IRONS_CANNOT_BE_MACHINED??$

IN_MALLEABLE_CAST_IRON,_THE_GRAPHITE_TURNS_INTO_SPHEROIDAL_PARTICLES.?$

WHICH_OF_THE_FOLLOWING_MATERIALS_CANNOT_BE_USED_FOR_MAKING_A_CORE_BOX??$

What is the effect of Nickel on cast irons?$

How are malleable cast irons designated for different grades?$

What_is_the_form_graphite_structure_in_ductile_cast_iron?$

What_is_the_temperature_in_a_core_box_typically?$

What is the defining property of Wrought Irons?

Which of these are applications of grey cast iron?

Due to the presence of which of the following does white cast iron appear white?

Up to what thickness can hot box process can be used for production?

Decomposition of cementite to form ferrite and graphite is known as ______?

Which of the following alloying element is added as a degasser?

Shell molding process is a costly process for gray iron castings.

What is the effect of phosphorus and sulphur in cast irons?

Which of the following alloying element refines pearlite structure?

Green sand molding provides the best surface finish.

An iron with high-silicon content is a _______

Which of the following alloying element increase hardness?

Up to what mass of gray cast irons can shell molds take?

Which element causes cementite to behave in a stable manner?

Which of the following alloying element forces the carbon out of the solution?

If the iron surface contains graphite, it is known as ________

At what temperature does pure iron turn into FCC structure?

What is the tensile strength of a thick gray cast iron?

Iron obtained from broken ______ is known as white iron.

Cast iron tends to be brittle.

What would be the tensile strength of a gray cast iron of class 20?

Cast iron is a _____ alloy.

How much carbon is present in cast irons?