Addition of copper to aluminium results in_____________________?

Related Mcqs:

1. Aluminium bronze contains aluminium and copper in the ratio of___________________?

   A. 50 : 50
   B. 40 : 60
   C. 60 : 40
   D. 10 : 90
   E. 90 : 10

2. Addition of manganese to aluminium results in__________________?

   A. improvement of casting characteristics
   B. improvement of corrosion resistance
   C. one of the best known age and precipitation-hardening systems
   D. improving machinability
   E. none of the above

3. Addition of silicon to aluminium results in____________________?

   A. improvement of casting characteristics
   B. improvement of corrosion resistance
   C. one of the best known age and precipitation-hardening systems
   D. improving machinability
   E. none of the above

4. Addition of lead and bismuth to aluminium results in_________________?

   A. improvement of casting characteristics
   B. improvement of corrosion resistance
   C. one of the best known age and precipitation-hardening systems
   D. improving machinability
   E. none of the above

5. Mach number is significant in_____________________?

   A. supersonics, as with projectiles and jet propulsion
   B. full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc.
   C. simultaneous motion through two fluids where there is a surface of dis-continuity, gravity force, and wave making effects, as with ship’s hulls
   D. all of fhe above
   E. none of the above

6. A specimen of aluminium metal when observed under microscope shows __________________?

   A. B.C.C. crystalline structure
   B. F.C.C. crystal structure
   C. H.C.P. structure
   D. a complex cubic structure
   E. orthorhombic crystalline structure

7. Alnico, an alloy used extensively for permanent magnets contains iron, nickel, aluminium and cobalt in the following ratio _____________________?

   A. 50 : 20 : 20 : 10
   B. 40 : 30 : 20 : 10
   C. 50 : 20 : 10 : 20
   D. 30 : 20 : 30 : 20
   E. 50 : 10 : 20 : 20

8. Which is false statement about properties of aluminium ___________________?

   A. modulus of elasticity is fairly low
   B. wear resistance is very good
   C. fatigue strength is not high
   D. creep strength limits its use to fairly low temperatures
   E. corrosion resistance is good

9. Aluminium bronze contains__________________?

   A. 94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe
   B. 92.5% aluminium, 4% copper, 2% nickel, and 1.5% Mg
   C. 10% aluminium and 90% copper
   D. 90% magnesium and 9% aluminium with some copper
   E. 10% aluminium and 90% tin

10. Brass (alloy of copper and zinc) is an example of__________________?

    A. substitutional solid solution
    B. interstitial solid solution
    C. intermetallic compounds
    D. all of the above
    E. none of the above