Related Mcqs:

1. _______________ is the hardest oxide and is hence used where high wear resistance at high temperature is required?

   A. Beryllium
   B. Zirconia
   C. Alumina
   D. Magnesia

2. Alloying elements present in Haynes stellite, which has superior performance than high speed steel, are____________________?

   A. Nickel, cobalt & chromium
   B. Tungsten, chromium & cobalt
   C. Manganese, chromium & cobalt
   D. Tungsten, molybdenum & nickel

3. Which of the following alloying elements is present in maximum percentage in high speed steel ?

   A. Molybdenum
   B. Chromium
   C. Tungsten
   D. Vanadium

4. Which of the following is not a principal alloying element for the structural steel ?

   A. Molybdenum
   B. Nickel
   C. Manganese
   D. Chromium

5. All of the following alloying elements of steel increases hardness but sacrifice ductility, except________________?

   A. Nickel
   B. Vanadium
   C. Molybdenum
   D. Chromium

6. Machinability of hard alloys and tool steels is improved by_____________________?

   A. Spheroidising
   B. Annealing
   C. Tempering
   D. Normalising

7. While the recrystallisation temperature for pure metals is 0.3 Tm, the same for alloys is equal to ______________ × Tm (where, Tm Melting temperature) ?

   A. 0.25
   B. 0.45
   C. 0.70
   D. 0.95

8. _____________________ of grey cast iron produces white cast iron?

   A. Tempering
   B. Rapid heating
   C. Rapid cooling
   D. Slow cooling

9. The ratio of the shear stress to the principal stress on a principal plane is______________________?

   A. 0
   B. 1
   C. 1/2
   D. 1/3

10. Nickel and ______________ are the alloying element added in steel to increase its toughness?

    A. Molybdenum
    B. Chromium
    C. Vanadium
    D. Silicon