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Machine Design

Machine Design
In order to have smooth operation, the minimum number of teeth on the smaller sprocket, for moderate speeds, should be

25
17
15
21

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Machine Design
The shear plane in case of bolts should

Never be across the threaded portion
Be normal to threaded portion of shank
Be across threaded portion of shank
Be parallel to axis of bolt

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Machine Design
Eye bolts are used for

Lifting and transportation of machines and cubicles
Absorbing shock and vibrations
Transmission of power
Foundation purposes

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Machine Design
In a steam engine, the piston rod is usually connected to the cross-head by means of a

Cotter joint
Oldham coupling
Knuckle joint
Universal joint

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Machine Design
In worm gears, the angle between the tangent to the pitch helix and an element of the cylinder, is known as

Pressure angle
Pitch lead angle
None of these
Helix angle

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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

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

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