A. Induce stresses in it
B. Refine its grain structure
C. Reduce segregation
D. Improve its mechanical properties
Related Mcqs:
- Solidification time of a molten metal in a casting is proportional to (where, V = volume of metal & A = its surface area; in the casting) ?
A. V/A
B. V/A2
C. V2/A
D. V2/A2 - Normalising of an object does not________________________?
A. Refine coarse grain structure obtained during hot working
B. Improve ductility
C. Improve yield strength
D. Improve mechanical properties - Titanium is added to molten aluminium alloys before casting for the purpose of_____________________?
A. Grain refinement
B. Increasing corrosion resistance
C. Reducing porosity
D. Improving fluidity - Steel & cast iron pipes are produced by ______________ casting ?
A. Slush
B. Die
C. Investment
D. True centrifugal - The most suitable material for die casting is __________________?
A. Iron
B. Copper
C. Steel
D. Nickel - Presence of nickel & chromium in steel does not raise its _________________?
A. Elastic limit
B. Machining properties
C. Ductility
D. Resilience - Powder metallurgy process does not make metal powder by_________________________?
A. Atomisation
B. Grinding/milling
C. Hammering
D. Electrolytic deposition - Which of the following does not have a sharp melting point ?
A. Thoria
B. Glass
C. Ice
D. Pig iron - Wrought iron does not have__________________?
A. Uniform strength in all directions
B. Ability to hold protective coating
C. High ductility & corrosion resistance
D. Easily weldable characteristics - Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother ?
A. Cresylic acid
B. Xanthaies
C. Pine oil
D. All A, B. & C.
