Powder metallurgy technique is used in the production of ____________________ tools ?

Related Mcqs:

1. Powder metallurgy process does not make metal powder by_________________________?

   A. Atomisation
   B. Grinding/milling
   C. Hammering
   D. Electrolytic deposition

2. Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition of_____________________?

   A. 90% tungsten carbide and 10% cobalt
   B. 70% aluminium oxide & 30% silica
   C. 30% nickel, 15% chromium & 55% tungsten
   D. 65% tungsten & 35% zirconium

3. For preparation of porous bearings by powder metallurgy, preferred particle shape is___________________?

   A. Spherical
   B. Nodular
   C. Irregular
   D. No preferred shape

4. Powder metallurgy is used to produce__________________?

   A. High precision components with complex cavities and sharp features
   B. Components of large size
   C. Porosity free components
   D. Components of such alloys whose constituents do not form alloys readily

5. Which of the following can be manufactured using powder metallurgy techniques ?

   A. Brake linings
   B. Bearings
   C. Carbide tool tips
   D. All A, B and C

6. Identify the correct statement with reference to the extractive metallurgy of aluminium ?

   A. The electrolyte consists of molten Na3AlF6 with approximately 1 to 8% Al2O3
   B. Approximately 80% of the aluminium deposited on the cathode comes from cryolite
   C. Sodium is deposited along with aluminium, but is immediately vaporised
   D. Anode effect sets in when the cryolite concentration goes below 40%.

7. Property responsible for the talcum powder to cling to the skin is the__________________?

   A. Capillary action
   B. Adhesion
   C. Cohesion
   D. Surface tension

8. Alloy powder manufactured by the following process have spherical shapes ?

   A. Electrochemical deposition
   B. Gaseous reduction
   C. Atomisation
   D. Mechanical attrition

9. Which of the following is the most wear resistant grade of carbide used for the cutting tools ?

   A. Aluminium carbide
   B. Tungsten carbide
   C. Nickel carbide
   D. Iron carbide

10. High speed steel tools retain their hardness upto a temperature of __________________ °C?

    A. 500
    B. 750
    C. 900
    D. 1100