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Machine Design

Machine Design
The shock resistance of steel is increased by adding

Chromium
Cobalt and molybdenum
Nickel
Nickel and chromium

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Machine Design
Lewis equation in gears is used to find the

Tensile stress in bending
Compressive stress in bending
Fatigue stress
Shear stress

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Machine Design
The radial distance of a tooth from the pitch circle to the top of the tooth is called

Dedendum
Clearance
Addendum
Working depth

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Machine Design
The notch sensitivity q is expressed in terms of fatigue stress concentration factor Kf and theoretical stress concentration factor Kt as

(Kf - 1)/ (Kt - 1)
(Kf + 1)/ (Kt + 1)
(Kt - 1)/ (Kf - 1)
(Kt + 1)/ (Kf + 1)

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Machine Design
Which of the following statement is correct for gears?

All of these
The addendum is less than dedendum
The pitch circle diameter is equal to the product of module and number of teeth
The pitch circle is always greater than the base circle

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Machine Design
A thin spherical shell of internal diameter d is subjected to an internal pressure p. If V is the storage capacity of shell, then its diameter will be

(6V/ π)1/2
(6V/ π)2
(6V/ π)3
(6V/ π)1/3

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