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Machine Design

Machine Design
Which one of the following is a positive drive?

V-belt drive
Chain drive
Crossed flat belt drive
Rope drive

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Machine Design
The constant factor in case of R10 series of preferred numbers is

1.06
1.58
1.12
1.26

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Machine Design
The material generally used for aircraft components is

Mild steel
High speed steel
Stainless steel
Aluminium

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

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

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

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Machine Design
In thrust bearings, the load acts

In any direction
Along the axis of rotation
Parallel to the axis of rotation
Perpendicular to the axis of rotation

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