Powder Metallurgy Bank PO MCQ Questions With Answers Quiz Questions

1. Green strength is

A Strength of unsintered components B Strength sintered components C Strength of raw metals D Difference in strength of sintered and unsintered components

2. Sintering is done to _____________

A increase final strength B decrease final strength C initially increase and then to decrease the strength D initially decrease and then to increase the strength

3. Process of forming metal powder by directing molten metal through an orifice after which it is break into small particle using high pressure fluid is known as?

A Atomization B Reduction C Crushing D Electrolysis

4. ___________ is simply the empty space in the product material.

A Viscosity B Malleability C Porosity D Ductility

5. Density in sintered product is improved byi.) hot pressing ii.) Cold pressing iii.) Machining iv.) Coining

A i, ii & iv B ii & iv C i & iv D i, ii, iii & iv

6. The _________________ process yields net-shape, or near-net-shape parts, so that little or no machining is required to obtain a finished part in many cases.

A Pulverisation B powder metallurgy C Atomic Reduction D Electrolytic process

7. Which method is used to make powder of metals having low melting point?

A Mechanical pulverisation B Electrolytic process C Chemical reduction D Atomization

8. The process which allows us to create high-quality components, while near-net-shape dimensional control provides a high degree of control over the manufacturing process, facilitating the production of complex shapes is _________________

A Powder metallurgy B Sand Casting C Machining D Metal casting

9. Which of the following tool is manufactured by powder metallurgy?

A High speed steel B Sintered carbides C High carbon steel D Low carbon steel

10. Sintering increases

A electrical conductivity, density and ductility B electrical conductivity, density and brittleness C porosity, electrical conductivity and brittleness D porosity, density and ductility

11. Range of particle size in powder to be used for powder metallurgy should vary from ___________________. Powder metallurgy has small wastage of material.

A 4 microns to 200 microns B 0.300 to 0.003 microns

12. In atomization

A passing molten metal through orifice and cooling it by dropping into water B molten metal is forced through a small orifice and broken up by a stream of compressed air C powder of metal is made by ball milling D the hydrogen reduces the oxide to metallic powder

13. Which of the following method is used to make powder for brittle metals?

A Mechanical Pulverisation B Electrolytic process C Chemical Reduction D Atomization

14. The parts produced by Powder metallurgy

A always require machining B are of higher dimensional accuracy C can not be heat treated D none of the above

15. Sintering is a ____________________process commonly used to increase the strength and structural integrity of a material. Powder metallurgy use sintering to convert metal powders to end-use parts.

A Mixing B heat treatment C Pressing D All the above

16. ___________ is the process of formation of metal powder to use in powder metallurgy by reducing some compound with CO or other reducing agents.

A Reduction B Atomisation C Pulverisation D Electrolytic Process

17. The production of highly porous parts by ________ using suitable spacer materials is a well-established technique for titanium and stainless steel.

A Press forming B Sand casting C Metal casting D powder metallurgy

18. The disintegration of a molten metal into particles by a rapidly moving gas or liquid stream or by other means is known as ____________

A Mechanical Pulverisation B Atomization C Chemical reduction D Electrolytic Process

19. Porosity of sintered products can be improved by process of ____________ by which the pores are filled with a lower melting point metal by capillary action

A Polymerisation B Pulverisation C Fragmentation D Infiltration