A. d1/2
B. d-1/2
C. d
D. d-1
Related Mcqs:
- 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 - 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 - _______________ test determines the yield strength, Young’s modulus of elasticity, percentage reduction in area & percentage elongation of a material ?
A. Tensile
B. Fatigue
C. Impact
D. None of these - The behaviour of a metal specimen, which when plastically strained in tension reduces its yield stress in compression and vice versa; is termed as the_______________?
A. Work hardening
B. Bauschinger effect
C. Creeping effect
D. Stress recovery effect - Wohler test is a destructive test to find out the ___________________ strength of a prepared metal specimen ?
A. Creep
B. Fatigue
C. Endurance
D. Tensile - ____________ is the process used for setting up compressive stresses in the surface of a metal to improve its fatigue strength ?
A. Lancing
B. Shot peening
C. Slugging
D. Spinning - Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity) ____________________?
A. 1/k
B. k
C. k2
D. 1/k2 - ____________________ flux is used for the extraction of metal from its self fluxing ores?
A. No
B. Acid
C. Basic
D. Neutral - ____________________ metal is used as a bearing liner material?
A. Pewter
B. White
C. Babbitt
D. Gun - Reduction in the grain size reduces the _________________ of the material?
A. Fatigue resistance
B. Tensile strength
C. Creep resistance
D. All A, B. & C
