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
When the speed of belt increases,

The coefficient of friction between the belt and pulley decreases
The power transmitted will increase
The coefficient of friction between the belt and pulley increases
The power transmitted will decrease

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Machine Design
A bolt of M 24 × 2 means that

The nominal diameter of bolt is 24 mm and pitch is 2 mm
The pitch of the thread is 24 mm and depth is 2 mm
Cross-sectional area of the threads is 24 mm²
The effective diameter of bolt is 24 mm and there are 2 threads per cm

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