250+ TOP MCQs on Cast Steel & Aluminium Alloys and Answers

Machine Design Multiple Choice Questions on “Cast Steel & Aluminium Alloys”.

1. Cast steel components do not exhibit the effect of directionality on mechanical properties.
a) True
b) False
Answer: a
Clarification: In casting process, there is no control over the fibre structure, thus non directional characteristics for cast steel components.

2. During solidification, cast steel shrinks to quite a great extent
a) True
b) False
Answer: a
Clarification: Excessive contractions observed in cast steel.

3. Relative density of aluminium is roughly _______ of steel
a) one-third
b) one-fifth
c) one-tenth
d) equal
View Answer

Answer: a
Clarification: Aluminium alloy=2.7 Steel=7.9.

4. Which of the following statement is true
a) Cast aluminium alloys are specified by a four digit system while wrought alloys by a five digit system
b) Cast aluminium alloys are specified by a five digit system while wrought alloys by a four digit system
c) Cast aluminium alloys are specified by a six digit system while wrought alloys by a five digit system
d) Cast aluminium alloys are specified by a five digit system while wrought alloys by a six digit system
Answer: a
Clarification: Standard set for nomenclature.

5. Which of the following are true for aluminium
a) Low specific gravity
b) Corrosion resistance
c) High thermal conductivity
d) All of the mentioned
Answer: d
Clarification: All are properties of aluminium.

6. Is it possible to completely relieve the residual stresses in a cast steel product?
a) True
b) False
Answer: b
Clarification: Solidification results in great amount of residual stresses.

7. Poor fluidity and contraction are compulsory to be taken into consideration while designing a cast steel product.
a) True
b) False
Answer: a
Clarification: Contraction affects to quite a extent in cast steel.

8. In alloy 4450, 2nd digit represents?
a) average percentage of major alloying elements, halved and rounded off
b) average percentage of major alloying elements
c) average percentage of minor alloying elements, halved and doubled
d) average percentage of minor alloying elements
Answer: a
Clarification: Second digit is used to represent major alloying element.

9. In alloy 4450, 4 represents?
a) Silicon
b) Aluminium
c) Manganese
d) Zinc
Answer: a
Clarification: In alloy nomenclature,1=Al;2=Cu;3=Mn;4=Si;5=Mg.

10. An aluminium alloy casting with 9.8% Cu, 1.0% Fe and 0.25% Mg
a) Alloy 2585
b) Alloy 3586
c) Alloy 2686
d) Alloy 3584
Answer: a
Clarification: 1st digit=2(Copper) ; 2nd digit=9.8/2=5 ;3rd digit=8(Iron); 4th digit=5(Magnesium).