Material Science And Metallurgy (3131904) MCQs

MCQs of Powder Metallurgy

Showing 1 to 10 out of 12 Questions
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1.

Sintering is performed ___________

(a)

At room temperature
(b)

Below melting point
(c)

Above boiling point
(d)

At cryogenic temperature
Answer:

Option (b)

2.

Porous product can be effectively produced using 

(a)

casting
(b)

forging
(c)

turning
(d)

powder metallurgy
Answer:

Option (d)

3.

A part produced by Powder metallurgy is termed a

(a)

Welded part  
(b)

Cast part 
(c)

 Forging part 
(d)

Sintered part
Answer:

Option (d)

4.

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

(a)

Mechanical pulverisation 
(b)

Electrolytic process 
(c)

 Chemical reduction  
(d)

Atomization
Answer:

Option (a)

5.

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

(a)

Mechanical pulverisation  
(b)

Electrolytic process  
(c)

Chemical reduction  
(d)

Atomization
Answer:

Option (d)

6.

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
Answer:

Option (b)

7.

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
Answer:

Option (b)

8.

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
Answer:

Option (b)

9.

For powder of Aluminium and its alloys, the sintering temperature and time is

(a)

370° – 500°C, upto 24 hrs  
(b)

250° – 350°C, upto 18 hrs
(c)

400°-600°C, upto 20 hrs    
(d)

550° – 700°C, upto 22 hrs
Answer:

Option (a)

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
Answer:

Option (a)

Showing 1 to 10 out of 12 Questions
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