Pick out the wrong statement.
A. Erosion corrosion which is identified by surface grooves, occurs due to the combined action of corrosive environment and mechanical abrasion
B. Stress corrosion occurs due to the combined action of corrosive environment and the compressive stress
C. Stainless steel is prone to stress corrosion in solution containing chloride ion
D. In case of stress corrosion, the direction of crack propagation is perpendicular to the applied tensile stress
Answer: Option B
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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