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Machine Design

Machine Design
The shock resistance of steel is increased by adding

Nickel
Cobalt and molybdenum
Chromium
Nickel and chromium

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Machine Design
The dedendum is the radial distance from the

Addendum circle to the clearance circle
Pitch circle to the bottom of a tooth
Pitch circle to the top of a tooth
Top of a tooth to the bottom of a tooth

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Machine Design
A shaft is subjected to fluctuating loads for which the normal torque (T) and bending moment (M) are 1000 N-m and 500 N-m respectively. If the combined shock and fatigue factor for bending is 1.5 and combined shock and fatigue factor for torsion is 2, then the equivalent twisting moment for the shaft is

2050 N-m
2100 N-m
2000 N-m
2136 N-m

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Machine Design
The most important dimension in the design of a nut is

Height
Inside diameter
Outside diameter
Pitch diameter

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Machine Design
If d is the normal diameter of a bolt in mm, then the initial tension in kg in a bolt used for making a fluid tight joint as for steam engine cover joint is calculated by the relation

168 d
124 d
138 d
151 d

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Machine Design
Which of the following formula is used in designing a connecting rod?

Johnson's parabolic formula
Johnson's straight line formula
Rankine's formula
Euler's formula

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