Explore topic-wise MCQs in Engineering Materials Metallurgy.

This section includes 25 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Materials Metallurgy knowledge and support exam preparation. Choose a topic below to get started.

1.

In sand casting of magnesium alloys, what is the amount of silica sand used in an American mix?

A. 80 lb
B. 90 lb
C. 100 lb
D. 110 lb
Answer» D. 110 lb
Discussion
2.

Magnesium alloys have a low strength to weight ratio.

A. True
B. False
Answer» C.
Discussion
3.

In grain refinement process, only hexachlorobenzene is used.

A. True
B. False
Answer» C.
Discussion
4.

Which of the following is not a property of a magnesium alloy?

A. High damping capacity
B. High electrical conductivity
C. Good fatigue strength
D. High thermal resistivity
Answer» E.
Discussion
5.

Pure magnesium melts at what temperature?

A. 600°C
B. 650°C
C. 700°C
D. 750°C
Answer» C. 700°C
Discussion
6.

Which of the following alloys is used in nuclear reactors?

A. Elektron
B. Magnox
C. Mag-Thor
D. Pyrotechnics
Answer» C. Mag-Thor
Discussion
7.

IN_GRAIN_REFINEMENT_PROCESS,_ONLY_HEXACHLOROBENZENE_IS_USED.?$

A. True
B. False
Answer» C.
Discussion
8.

WHICH_OF_THE_FOLLOWING_ALLOYS_IS_USED_IN_NUCLEAR_REACTORS??$

A. Elektron
B. Magnox
C. Mag-Thor
D. Pyrotechnics
Answer» C. Mag-Thor
Discussion
9.

In sand casting of magnesium alloys, what is the amount of silica sand used in an American mix?$

A. 80 lb
B. 90 lb
C. 100 lb
D. 110 lb
Answer» D. 110 lb
Discussion
10.

Magnesium alloys have a low strength to weight ratio.$

A. True
B. False
Answer» C.
Discussion
11.

In sand casting of magnesium alloys, what is the amount of bentonite sand used in a British mix?

A. 3 lb
B. 4 lb
C. 5 lb
D. 6 lb
Answer» C. 5 lb
Discussion
12.

What should the temperature ideally be to remove the casting after making of magnesium alloys?

A. Below 450°C
B. Below 300°C
C. Below 350°C
D. Below 300°C
Answer» E.
Discussion
13.

A magnesium alloy containing 3% rare earth metal exhibits which of the following characteristics?

A. Creep resistance up to 250oC
B. Good founding properties
C. Die-casting alloy
D. Good overall properties
Answer» B. Good founding properties
Discussion
14.

In magnesium alloys, what is the maximum amount of allowed aluminum?

A. 11%
B. 13%
C. 19%
D. 24%
Answer» B. 13%
Discussion
15.

Which of the following is a type of aluminum alloy with magnesium?

A. Mag-Thor
B. Magnox
C. Birmabright
D. Elektron
Answer» D. Elektron
Discussion
16.

What should be the temperature of the mixture while alloying takes place?

A. 550°C
B. 600°C
C. 650°C
D. 700°C
Answer» E.
Discussion
17.

Dow metal contains ______ of magnesium.

A. 0%
B. 5%
C. 50%
D. 90%
Answer» E.
Discussion
18.

What is the color of pure magnesium metal?

A. Red
B. White
C. Black
D. Yellow
Answer» C. Black
Discussion
19.

How does a high amount of magnesium affect alloys?

A. Increases strength
B. Increases corrosion resistance
C. Lowers density
D. Becomes brittle
Answer» E.
Discussion
20.

Magnalium is an alloy of magnesium, ________

A. Nickel and Tin
B. Zinc and Tin
C. Nickel and Zinc
D. Zirconium and Zinc
Answer» B. Zinc and Tin
Discussion
21.

Which of the following can be the casting temperature for magnesium alloys?

A. 630°C
B. 760°C
C. 850°C
D. 970°C
Answer» C. 850¬¨¬®‚Äö√†√ªC
Discussion
22.

Which of the following is not a property of magnesium?

A. Low strength
B. Vulnerable to corrosion
C. Expensive
D. Heavyweight
Answer» E.
Discussion
23.

Which of the following metals is least used in making magnesium alloys?

A. Aluminium
B. Zinc
C. Copper
D. Manganese
Answer» D. Manganese
Discussion
24.

What is the melting point of magnesium?

A. 419<sup>o</sup>C
B. 650<sup>o</sup>C
C. 1091<sup>o</sup>C
D. 2562<sup>o</sup>C
Answer» C. 1091<sup>o</sup>C
Discussion
25.

What is the specific gravity of magnesium?

A. 1.74
B. 2.7
C. 6.3
D. 8.9
Answer» B. 2.7
Discussion