Machine Design Mcqs Questions MCQs
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Question 13. When a closely coiled helical spring is subjected to a couple about its axis, the stress induced in the wire material of the spring is
- Bending stress only
- A combination of torsional shear stress and bending
- Direct shear stress only
- A combination of bending stress and direct shear stress
Answer: Option A
Question 18. In replacing the v-belts, a complete set of new belts is used instead of replacing a single damaged belt because
- Belts are available in sets
- Only one belt cannot be fitted with other used belts
- The new belt will carry more than its share and result in short life
- New and old belts will cause vibrations
Answer: Option C
- The solid length of a spring is the product of total number of coils and the diameter of the wire
- The spring index is the ratio of mean diameter of the coil to the diameter of the wire
- The spring stiffness is the load required per unit deflection of the spring
- The pitch of the coil is the axial distance between adjacent coils in the compressed state
Answer: Option D
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