Fatigue strength of a metal is improved by
A. Overstressing
B. Scratching the surface
C. Raising the temperature
D. Understressing
Answer: Option D
A. Overstressing
B. Scratching the surface
C. Raising the temperature
D. Understressing
Answer: Option D
Which of the following will resist maxi-mum shock & vibration without cracking?
A. Grey cast iron
B. White cast iron
C. Malleable iron
D. Graphite
A. Pulverised fuel
B. Travelling grate stoker firing
C. Circulating fluidised bed
D. Fluidised bed
Isotropic materials have the same __________ in all directions.
A. Induced stresses
B. Density
C. Elastic properties
D. Thermal properties
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