A. Increases
B. Decreases
C. Remain constant
D. Either A. or B.; depends on the material
Related Mcqs:
- Reduction in the grain size reduces the _________________ of the material?
A. Fatigue resistance
B. Tensile strength
C. Creep resistance
D. All A, B. & C - On decreasing the grain size of a polycrystalline material, the property most likely to deteriorate is__________________?
A. Creep
B. Toughness
C. Tensile strength
D. Fatigue - Consideration of the creep is the most important in case of the_____________________?
A. Blades of gas turbine
B. Piston of an I. C. engine
C. Flywheel of steam engine
D. Cycle chain - A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material ?
A. Steel
B. Glass
C. Rubber
D. Brass - Yield strength of a polycrystalline metal with an average grain size „d’, is proportional to ____________________?
A. d1/2
B. d-1/2
C. d
D. d-1 - For grinding of softer materials, the grinding wheel should have _________________ grain size ?
A. Finer
B. Coarser
C. Medium
D. Any type of - In the formation of cermets, the ratio of ceramic material to metallic material is usually 80:20. Which of the following is a cermet ?
A. Zirconia
B. Alumina
C. Bakelite
D. Tungsten carbide - A material in which the atoms are arranged regularly in some directions but not in others, is termed as ‘mesomorphous material’; an example of which is_________________?
A. Lead
B. Glass
C. Mica
D. Silver - The stress at which extension of the material takes place more rapidly as compared to the increase in load is termed as the _____________ point of the material?
A. Elastic
B. Ultimate
C. Yielding
D. Breaking - An oxidation process is accompanied with decrease in the____________________?
A. Number of electrons
B. Oxidation number
C. Number of ions
D. All A , B. & C.
