Machine Design
Gear box is used

For speed reduction
To increase efficiency of system
To produce torque
To obtain variable speeds

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Machine Design
Which of the following statement is wrong for a connecting rod?

If Ixx > 4 Iyy, the buckling will occur about Y-axis
The most suitable section for the connecting rod is T-section
If Ixx < 4 Iyy, the buckling will occur about X-axis
The connecting rod will be equally strong in buckling about X-axis and Y-axis, if Ixx = 4 Iyy

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Machine Design
The creep in the belt is due to

Stresses beyond elastic limit of belt material
Material of belt
Unequal extensions in the belt due to tight and slack side tensions
Effect of temperature on belt

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