Powder Metallurgy — Part 1 MCQs with Explanations

All of these is the correct answer to “Which of the following components can be manufactured by powder metallurgy technique”. This question is standard in competitive examination syllabi for Powder Metallurgy.

I, II and III are true, but IV is not true is the correct answer to “Advantages of Casting are: (I) Can create complex part geometries, 3-D shapes (II) Can create both external and internal shapes and large hollow shapes (III) It is a near net shape process for small to large parts (IV) Very good mechanical strength can be obtained for as-cast component”. This question is standard in competitive examination syllabi for Powder Metallurgy.

in the range of 40 to 300MPa and 500 to 2200°C respectively is the correct answer to “During hot isostatic pressing of powder particulates, the pressure and temperatures are”. This question is standard in competitive examination syllabi for Powder Metallurgy.

Both B and C is the correct answer to “Density in sintering product is improved by”. This question is standard in competitive examination syllabi for Powder Metallurgy.

Same is the correct answer to “In case of binary alloys, when the tangent touches plot for two phases, it means that at that composition, chemical potential of component A in both phases are”. This question is standard in competitive examination syllabi for Powder Metallurgy.

1000 C/s is the correct answer to “In ultrarapid solidification process of powder production, the rate of cooling is”. This question is standard in competitive examination syllabi for Powder Metallurgy.

Sintering of powder is the correct answer to “Powder Metallurgy is the branch of metallurgy in which parts are produced by”. This question is standard in competitive examination syllabi for Powder Metallurgy.

ISO 3252 is the correct answer to “The statement of sintering "The thermal treatment of a powder or compact, at a temperature below the melting point of the main constituent for the purpose of increasing its strength" is given by”. This question is standard in competitive examination syllabi for Powder Metallurgy.

grain boundaries is the correct answer to “During intermediate steps the pores are situated at the intersection of three or four”. This question is standard in competitive examination syllabi for Powder Metallurgy.

Any number od data may lie within -1σ to +1σ is the correct answer to “For random distribution of particle size, standard deviation is defined in such a way that:”. This question is standard in competitive examination syllabi for Powder Metallurgy.

All of these is the correct answer to “Which of the following method is used to produce powder in powder metallurgy”. This question is standard in competitive examination syllabi for Powder Metallurgy.

Soluble gas atomization is the correct answer to “Vacuum atomization is also known as . . . . . . . .”. This question is standard in competitive examination syllabi for Powder Metallurgy.

all of these is the correct answer to “The particle shape influences”. This question is standard in competitive examination syllabi for Powder Metallurgy.

all of these is the correct answer to “Pick best answer for following statements”. This question is standard in competitive examination syllabi for Powder Metallurgy.

all of these is the correct answer to “Advantages of powder metallurgy are”. This question is standard in competitive examination syllabi for Powder Metallurgy.

Cermet is the correct answer to “Which of the following term can be used to describe a cemented carbide:”. This question is standard in competitive examination syllabi for Powder Metallurgy.

three is the correct answer to “The sintering of powder particulates is completed in how many stages”. This question is standard in competitive examination syllabi for Powder Metallurgy.

Only 1, 2 and 4 are true is the correct answer to “Which of the following is (are) true regarding powder metallurgy? 1. Zero or minimal scrap 2. No secondary operation 3. Poor surface finish 4. High dimensional accuracy of components manufactured”. This question is standard in competitive examination syllabi for Powder Metallurgy.

8 - 10 times the charged particles is the correct answer to “The mass of the balls in vibratory ball mill”. This question is standard in competitive examination syllabi for Powder Metallurgy.

porosity is the correct answer to “The process of infiltration in sintered products is to improve”. This question is standard in competitive examination syllabi for Powder Metallurgy.

decreases is the correct answer to “If the mesh size increases, powder particle size”. This question is standard in competitive examination syllabi for Powder Metallurgy.

angular is the correct answer to “. . . . . . . . particle shape is obtained for powders produced from hard, brittle deposits.”. This question is standard in competitive examination syllabi for Powder Metallurgy.

Pressure compaction process is the correct answer to “Explosive compaction is”. This question is standard in competitive examination syllabi for Powder Metallurgy.

size, shape, and surface area of powder particles is the correct answer to “Final properties of the finished powder metallurgy product depends on”. This question is standard in competitive examination syllabi for Powder Metallurgy.

cements is the correct answer to “Which materials when mixed with water first form slurry, then set and finally harden”. This question is standard in competitive examination syllabi for Powder Metallurgy.

High is the correct answer to “The dimensional accuracy in powder metallurgy”. This question is standard in competitive examination syllabi for Powder Metallurgy.

Sintered part is the correct answer to “A part produced by Powder metallurgy is termed as”. This question is standard in competitive examination syllabi for Powder Metallurgy.

4 to 200 is the correct answer to “In powder metallurgy, range of particle size (in microns) is”. This question is standard in competitive examination syllabi for Powder Metallurgy.

molten metal is forced through a small orifice and broken up by a stream of compressed air is the correct answer to “In atomization process”. This question is standard in competitive examination syllabi for Powder Metallurgy.

inversely proportional to the radius of curvature of the surface is the correct answer to “The vacancy concentration during sintering”. This question is standard in competitive examination syllabi for Powder Metallurgy.

Powder metallurgy is the correct answer to “Porous product can be effectively produced by using”. This question is standard in competitive examination syllabi for Powder Metallurgy.

BET method measures surface area related to both closed pores as well as open pores is the correct answer to “With regard to BET gas adsorption method and Darcy's gas permeability method, which of the following is true”. This question is standard in competitive examination syllabi for Powder Metallurgy.

improve physical and chemical properties is the correct answer to “Metal powders treatment is refer to”. This question is standard in competitive examination syllabi for Powder Metallurgy.

Log-Normal distribution is the correct answer to “Usually powder particles show this kind of distribution”. This question is standard in competitive examination syllabi for Powder Metallurgy.

sinter density is the correct answer to “Which of the following is highest density in sintering process”. This question is standard in competitive examination syllabi for Powder Metallurgy.

Stress, vapour pressure and vacancy concentration is the correct answer to “The driving force of the sintering process depends on the term/terms”. This question is standard in competitive examination syllabi for Powder Metallurgy.

increase in roll diameter is the correct answer to “The increase in density and strength of powder compacts for a given strip thickness can be achieve by”. This question is standard in competitive examination syllabi for Powder Metallurgy.

370° - 500°C, up to 24 hrs is the correct answer to “For powder of Aluminium and its alloys, the sintering temperature and time is”. This question is standard in competitive examination syllabi for Powder Metallurgy.

Volume diffusion and grain boundary diffusion is the correct answer to “Pick out correct option for bulk transport phenomena of mechanism of mass transport during sintering are”. This question is standard in competitive examination syllabi for Powder Metallurgy.

spraying is the correct answer to “Glaze coatings are applied on the green body by”. This question is standard in competitive examination syllabi for Powder Metallurgy.