A planetary mill is used for
A. hot reduction of a slab directly to strip
B. grinding ceramic powders to a very fine mesh
C. reduction gear in a pulley system
D. rotary kiln assembly in cement production
Answer: Option A
This Question Belongs to Metallurgical Engineering >> Mechanical Metallurgy
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In a tensile test of ductile material, necking starts at
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B. upper yield stress
C. ultimate tensile strength
D. just before fracture
A. $$2 + \frac{{\sigma 3}}{2}$$
B. $$4 + \frac{{\sigma 3}}{5}$$
C. $$5 + \frac{{\sigma 3}}{2}$$
D. $$5 + \frac{{\sigma 3}}{3}$$
A. P-1, Q-2, R-3
B. P-4, Q-3, R-1
C. P-3, Q-1, R-4
D. P-2, Q-1, R-3
A. the outer edges of the rod
B. $$\frac{r}{3}$$ from the centre
C. $$\frac{r}{2}$$ from the centre
D. the centre
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