0
Mcqs

Powder Metallurgy Mcqs

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

 

Powder Metallurgy Multiple Choice Questions Highlights

  • 1000+ Multiple Choice Questions & Answers (MCQs) in Powder Metallurgy 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 Powder Metallurgy Subject.

 

Who should Practice Powder Metallurgy MCQs?

  • Students who are preparing for college tests and exams such as mid-term tests and semester tests on Powder Metallurgy.
  • Students who are preparing for Online/Offline Tests/Contests in Powder Metallurgy.
  • Students who wish to sharpen their knowledge of Powder Metallurgy Subject.
  • Anyone preparing for Aptitude test in Powder Metallurgy.
  • 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:

External lubrication is not preferred for sizing, coining, and repressing.

A) True B) False
 
Answer & Explanation Answer: B) False

Explanation: Use of external lubricants (liquid or dry) is preferred for various post sintering operations like sizing, coining, and repressing and care should be taken to avoid retention of lubricant by the part which may interfere with further operations like plating.

View Answer Discuss

Category: Mechanical Engineering MCQs
Sub Category: Powder Metallurgy Mcqs

318
Q:

Which of the following changes do not occur on during recrystallization?

A) Pore shrinkage B) Phase changes
C) Grain shrinkage D) Precipitation
 
Answer & Explanation Answer: C) Grain shrinkage

Explanation: Recrystallization includes changes in the microstructure, phase changes, grain growth, precipitation and pore shrinkage.

View Answer Discuss

Category: Mechanical Engineering MCQs
Sub Category: Powder Metallurgy Mcqs

260
Q:

Doping of Ni in tungsten compacts is an example of _________

A) Activated sintering B) Reaction sintering
C) Microwave sintering D) Gas plasma sintering
 
Answer & Explanation Answer: A) Activated sintering

Explanation: The doping of Ni in tungsten compacts is an example of activated sintering. In activated sintering, the addition of a small amount of an alloying element called ‘doping’ increases the rate of densification to a great extent compared to the undoped compacts.

View Answer Discuss

Category: Mechanical Engineering MCQs
Sub Category: Powder Metallurgy Mcqs

165
Q:

Which of the following characteristic the ‘doping’ additive should not possess?

A) Segregate at the grain boundary B) Formation of low melting point phase
C) High atomic weight D) High solubility
 
Answer & Explanation Answer: C) High atomic weight

Explanation: To promote activated sintering, any additive must form a low-melting phase during sintering and also must segregate at the grain boundaries. The additive must also have a very high solubility for the base metal to promote the rapid diffusion of base metal through the additive phase.

View Answer Discuss

Category: Mechanical Engineering MCQs
Sub Category: Powder Metallurgy Mcqs

134
Q:

Which of the following characteristics does irregular shaped particles do not possess?

A) Reduced apparent density B) Good pressing properties
C) Good sintering properties D) Maximum flow rate
 
Answer & Explanation Answer: D) Maximum flow rate

Explanation: Irregularly shaped particles possess reduced apparent density and flow rate but good pressing and sintering properties. Spherical shaped particles possess maximum apparent density and flow rate but reduced pressing and sintering properties.

View Answer Discuss

Category: Mechanical Engineering MCQs
Sub Category: Powder Metallurgy Mcqs

134
Q:

SiN is prepared by _______

A) Reaction sintering B) Hot forging
C) Solid-state sintering D) Liquid phase sintering
 
Answer & Explanation Answer: A) Reaction sintering

Explanation: Reaction sintering may also involve heating in a gas atmosphere, which reacts with the powder compact resulting in the formation of the desired compound. A typical example is the production of reaction bonded SiN made by sintering green compact of Si powders in N2 atmosphere at 1,523 to 1,673 K for time up-to 70 hours.

View Answer Discuss

Category: Mechanical Engineering MCQs
Sub Category: Powder Metallurgy Mcqs

132
Q:

The initial free energy of the compact before sintering must be _______

A) Positive B) Negative
C) Zero D) Infinite
 
Answer & Explanation Answer: B) Negative

Explanation: Initially, the free energy of the system (compact) (dE) must be negative, that is, the free energy of solid-solid interfaces must have lower free energy than the solid-vapor interface. Thus, during sintering, the newly formed solid-solid interfaces (i.e. grain boundaries) replace the existing solid-vapor interfaces, thereby lowering the free energy of the system.

View Answer Discuss

Category: Mechanical Engineering MCQs
Sub Category: Powder Metallurgy Mcqs

125
Q:

________ transforms compacted mechanical bonds between powder particles into metallurgical bonds.

A) Sintering B) SHP
C) Mechanical alloying D) Metal Injection Molding
 
Answer & Explanation Answer: A) Sintering

Explanation: Sintering is defined as the heating of loose or compacted aggregate of metal powders below the melting point of base metal to transform it to a denser material by interparticle bonding and thus, sintering transforms compacted mechanical bonds between powder particles into metallurgical bonds.

View Answer Discuss

Category: Mechanical Engineering MCQs
Sub Category: Powder Metallurgy Mcqs

123