Automobile Designer Question:
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Backlash is

(a) Sum of the clearance of two gears
(b) Mutual play between two gears
(c) Amount by which the width of a tooth space exceeds the thickness of the engaging tooth on pitch circle
(d) Any of the above

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What is Hertzian stress? (a) Tensile stress on inner surface of cylinder (b) Bending stress on two contact surface (c) Contact stress on two contact surfaces (d) Shear stress on two contact surfaces	A bolt of uniform strength can be developed by (a) Keeping the core dia of threads equal to the dia of unthreaded portion of bolt (b) Keeping the core dia of threads smaller than the dia of unthreaded portion of bolt (c) Keeping the nominal dia of threads equal to the dia of unthreaded portion of bolt (d) None of the above