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Machine Design

Machine Design
Which is positive drive?

Timing belt
V belt drive
Crossed belt drive
Flat belt drive

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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

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

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Machine Design
In helical gears, the distance between similar faces of adjacent teeth along a helix on the pitch cylinders normal to the teeth, is called

Diametral pitch
Module
Axial pitch
Normal pitch

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Machine Design
An alien bolt is

Self locking bolt
Same as stud
Provided with hexagonal depression in head
Used in high speed components

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Machine Design
If a bearing is designated by the number 305, it means that the bearing is of

Medium series whose bore is 25 mm
Light series whose bore is 5 mm
Light series whose bore is 25 mm
Medium series whose bore is 5 mm

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Machine Design
A screw will be self locking, if

Friction angle is less than helix angle
Friction angle is equal to helix angle
Efficiency of screw is 100%
Friction angle is more than helix angle

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