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Machine Design

Machine Design
Crushing resistance required to crush the rivet per pitch length is

p.d.σc
(p - d) t.σc
n.d.t.σc
p.t.σc

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Machine Design
Two closely coiled helical springs with stiffness k₁ and k₂ respectively are connected in series. The stiffness of an equivalent spring is given by

(k₁ - k₂)/ (k₁ k₂)
(k₁ k₂)/ (k₁ + k₂)
(k₁ + k₂)/ (k₁ k₂)
(k₁ - k₂)/ (k₁ + k₂)

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Machine Design
The allowable static stress for steel gears is approximately __________ of the ultimate tensile stress.

One-third
One-fourth
One-half
Double

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Machine Design
The number of slots in a 25 mm castle nut is

6
4
8
2

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Machine Design
A steel containing up to 0.15% carbon is known as

High carbon steel
Dead mild steel
Mild steel
Medium carbon steel

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Machine Design
The ratio of pitch circle diameter in millimeters to the number of teeth, is called

Circular pitch
Module
None of these
Diametral pitch

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