Two samples A and B of a brittle material have crack lengths in the ratio 3 : 1. The ratio of the tensile strengths (measured normal to the cracks) of A and B will be in the ratio
A. 1 : 3
B. √3 : 1
C. 1 : √3
D. 1 : 9
Answer: Option B
A. 1 : 3
B. √3 : 1
C. 1 : √3
D. 1 : 9
Answer: Option B
Which of the following are not commercially manufactured by powder metallurgy
A. Aircraft brake pads
B. Self-lubricating bearings
C. Tungsten carbide based cutting tools
D. Turbine blades
A. 10 degrees
B. 21 degrees
C. 30 degrees
D. 50 degrees
Which crystal system does not have all axial angles at 90 degrees?
A. Tetragonal
B. rhombohedral
C. orthorhombic
D. cubic
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