Explore topic-wise MCQs in Casting.

This section includes 19 Mcqs, each offering curated multiple-choice questions to sharpen your Casting knowledge and support exam preparation. Choose a topic below to get started.

1.

Which of the following gases can be beneficial in imparting certain desirable qualities to the castings?

A. Oxygen
B. Nitrogen
C. Hydrogen
D. Carbon monoxide
Answer» C. Hydrogen
Discussion
2.

Variation in solubility of gases can cause the generation of gases in metal castings.

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

Which of the following metals has the lowest liquid solubility (cc/kg) of hydrogen at atmospheric pressure?

A. Iron
B. Copper
C. Magnesium
D. Aluminium
Answer» E.
Discussion
4.

In the hydrogen removal process, carbon monoxide for ferrous alloys removes not only hydrogen but also nitrogen.

A. True
B. False
Answer» B. False
Discussion
5.

Nitrogen cannot be used for ferrous and nickel based alloys in hydrogen removal technique because_____

A. it leads to form high dross in metal castings
B. it gives rise to porosity in metal castings
C. it affects the grain size
D. it generates blow holes in metal castings
Answer» D. it generates blow holes in metal castings
Discussion
6.

Which of the following formulas show the Sievert’s law of percent of hydrogen (H) present in a melt?a) H = K(pH

A. H = K(pHa)2
B. H = K*pHa
C. H = K/pHa
D. H = K√pHa
Answer» E.
Discussion
7.

Which of the following metals comes in an exothermic group of metals when the solubility of hydrogen is concerned?

A. Iron
B. Titanium
C. Magnesium
D. Nickel
Answer» C. Magnesium
Discussion
8.

IN_THE_HYDROGEN_REMOVAL_PROCESS,_CARBON_MONOXIDE_FOR_FERROUS_ALLOYS_REMOVES_NOT_ONLY_HYDROGEN_BUT_ALSO_NITROGEN.?$

A. True
B. False
Answer» B. False
Discussion
9.

Variation in solubility of gases can cause generation of gases in metal castings.$

A. True
B. False
Answer» B. False
Discussion
10.

Which_of_the_following_metals_has_the_lowest_liquid_solubility_(cc/kg)_of_hydrogen_at_atmospheric_pressure?$

A. Iron
B. Copper
C. Magnesium
D. Aluminium
Answer» E.
Discussion
11.

Which_of_the_following_gases_can_be_beneficial_in_imparting_certain_desirable_qualities_to_the_castings?

A. Oxygen
B. Nitrogen
C. Hydrogen
D. Carbon monoxide
Answer» C. Hydrogen
Discussion
12.

Nitrogen cannot be used for ferrous and nickel based alloys in hydrogen removal technique because____?

A. it leads to form high dross in metal castings
B. it gives rise to porosity in metal castings
C. it affects the grain size
D. it generates blow holes in metal castings
Answer» D. it generates blow holes in metal castings
Discussion
13.

Improper venting arrangement causes mechanical trapping of gases in metal castings.

A. True
B. False
Answer» B. False
Discussion
14.

Which of the following methods is best for preventing the solutions of gases in metals?

A. Bubbling of gas
B. Vacuum melting
C. Venting arrangement
D. Elements inclusion
Answer» C. Venting arrangement
Discussion
15.

Maintaining of hydrogen level to a minimum in a melt is very important because there is no simple dehydrogenating technique.

A. True
B. False
Answer» B. False
Discussion
16.

Which of the following formulas show the Sievert’s law of percent of hydrogen (H) present in a melt?$

A. H = K(pHa)<sup>2</sup>
B. H = K*pHa
C. H = K/pHa
D. H = K‚àöpHa
Answer» E.
Discussion
17.

Presence of hydrogen in endothermic metals causes lattice distortion.

A. True
B. False
Answer» C.
Discussion
18.

Which of the following equations represent the solubility (S) of the hydrogen in the metals?

A. S = C exp[-E<sub>s</sub>/(kθ)]
B. S = C exp[-E<sub>s</sub>*(kθ)]
C. S = C log[-E<sub>s</sub>/(kθ)]
D. S = C log[-E<sub>s</sub>*(kθ)]
Answer» B. S = C exp[-E<sub>s</sub>*(k‚âà√≠‚Äö√†√®)]
Discussion
19.

Which of the following metals comes in exothermic group of metals when the solubility of hydrogen is concerned?

A. Iron
B. Titanium
C. Magnesium
D. Nickel
Answer» C. Magnesium
Discussion