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Mcqs

Phase Transformation Mcqs

Our 1000+ Phase Transformation MCQs (Multiple Choice Questions and Answers) focus on all areas of Phase Transformation covering 100+ topics. These topics are chosen from a collection of the most authoritative and best reference books on Phase Transformation. One should spend 1 hour daily practicing these MCQs for 2-3 months to learn and assimilate the Phase Transformation subject comprehensively. This way of systematic learning will prepare anyone easily for Phase Transformation exams, contests, online tests, quizzes, MCQ-tests, viva-voce, interviews, and certifications.

 

Phase Transformation Multiple Choice Questions Highlights

  • 1000+ Multiple Choice Questions & Answers (MCQs) in Phase Transformation with a detailed explanation of every question.
  • These MCQs cover theoretical concepts, true-false(T/F) statements, fill-in-the-blanks, and match the following style statements.
  • These MCQs also cover numerical as well as diagram-oriented MCQs.
  • These MCQs are organized chapterwise and each Chapter is further organized topicwise.
  • Every MCQ set focuses on a specific topic of a given Chapter in the Phase Transformation Subject.

 

Who should Practice Phase Transformation MCQs?

  • Students who are preparing for college tests and exams such as mid-term tests and semester tests on Phase Transformation.
  • Students who are preparing for Online/Offline Tests/Contests in Phase Transformation.
  • Students who wish to sharpen their knowledge of Phase Transformation Subject.
  • Anyone preparing for Aptitude test in Phase Transformation.
  • Anyone preparing for interviews (campus/off-campus interviews, walk-in interviews, and company interviews).
  • Anyone preparing for entrance examinations and other competitive examinations.
  • All - Experienced, Freshers and College / School Students.
Latest Popular
Q:

The quantum of energy in an elastic wave is called a ___________

A) Debye model B) Sonar
C) Phonon D) Photon
 
Answer & Explanation Answer: C) Phonon

Explanation: Phonon is the name for the quantum of energy in an elastic wave. Sonar is method or technique to detect object on or under the surface of water. Debye model is a technique to estimate the phonon contribution to the specific heat.

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Category: Mechanical Engineering MCQs
Sub Category: Phase Transformation Mcqs

203
Q:

If we consider that there are no volume and enthalpy changes caused by mixing, then the only contribution to the entropy will be__________

A) Thermal B) Configurational
C) Hydrostatic D) Rotational
 
Answer & Explanation Answer: B) Configurational

Explanation: The only contribution to the entropy will be Configurational. Configurational entropy comes from the possibility of arranging the atoms A and B in different ways for a particular macro state.

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Category: Mechanical Engineering MCQs
Sub Category: Phase Transformation Mcqs

197
Q:

Let’s take the tip of a growing dendrite. Here in this case it can be seen that the tip velocity tends to zero for a particular value of r known as______

A) Critical radius B) Open radius
C) Closed radius D) Extended radius
 
Answer & Explanation Answer: A) Critical radius

Explanation: The above mentioned condition takes place when the radius tends to the critical radius and this is due to the Gibbs-Thomson effect and the r tends to infinity due to slower heat conduction. The maximum velocity can be acquired when the value of r = 2r*.

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Category: Mechanical Engineering MCQs
Sub Category: Phase Transformation Mcqs

191
Q:

Which among the following condition about a simple binary system is not a part of Hume- Rothery rule?

A) Same crystal structure B) Size difference is less than 15
C) Electronegativity’s have similar values D) Composition should be almost similar
 
Answer & Explanation Answer: D) Composition should be almost similar

Explanation: Hume-Rothery rules doesn’t state anything about the composition of the system. Hume-Rothery rule states about the atomic size factor, it states about the similarity of 2 elements based on the solid solubility factor, it tells about the dissolving capacity of a metal based on its valency and it relates the electronegativity with solubility.

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Category: Mechanical Engineering MCQs
Sub Category: Phase Transformation Mcqs

184
Q:

Gibbs free energy of a homogeneous nucleation is _____

A) Greater than heterogeneous nucleation B) Less than heterogeneous nucleation
C) Greater than or equal to heterogeneous nucleation D) Less than or equal to heterogeneous nucleation
 
Answer & Explanation Answer: C) Greater than or equal to heterogeneous nucleation

Explanation: ?G heterogeneous is equal to some S(?)*?G of homogeneous where S(?) ? 1, is a function of the wetting angle. So hence the product of this will always be less than or equal to the homogeneous nucleation.

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Category: Mechanical Engineering MCQs
Sub Category: Phase Transformation Mcqs

179
Q:

Calculate the maximum grain size D’max possible, if the radius of the spherical particle is 5mm and the volume fraction is given as 0.2?

A) 33.33mm B) 66.66mm
C) 10mm D) 38.33mm
 
Answer & Explanation Answer: A) 33.33mm

Explanation: The driving force will be insufficient to overcome the drag of the particles and grain growth stagnates. A maximum grain size will be given by 4r/3f. Substituting the values of f and r as 0.2 and 5mm we get the required answer.

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Category: Mechanical Engineering MCQs
Sub Category: Phase Transformation Mcqs

168
Q:

Which rule gives the relative number of moles of ? and ? that must be present, if the overall composition is given as some X? (?, ? are stable forms of 2 substance)

A) Richard’s Rule B) Raoul’s Rule
C) Henry’s Rule D) Lever rule
 
Answer & Explanation Answer: D) Lever rule

Explanation: If the overall composition of the phase mixture is X, the lever rule gives the relative number of moles of ? and ? that must be present and the Gibbs free energy can be calculated from the molar energy curve for the phase.

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Category: Mechanical Engineering MCQs
Sub Category: Phase Transformation Mcqs

155
Q:

Which among the following is not a zone in solidified alloy ingots?

A) Columnar zone B) Outer chill zone
C) Central equiaxed zone D) Coverage zone
 
Answer & Explanation Answer: D) Coverage zone

Explanation: (i) An outer chill zone of equiaxed crystals, (ii) A columnar zone of elongated or column-like grains, and (iii) A central equiaxed zone. If you take in general these are the three different zones that can be distinguished in solidified alloy ingots.

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Category: Mechanical Engineering MCQs
Sub Category: Phase Transformation Mcqs

155