unit 4

1. spring length under fully compressed condition.
7. it is one of the device used to convert rotary motion into translatory motion
9. multiple thread are used to secure
11. when friction angle is more than helix angle then torque required to raise the load is
12. it is one type of spring.
13. resultant shear stress is maximum in which edge of spring
14. it is modification of square thread

1. It is defined as ratio of mean diameter of coil to the diameter of wire.
2. spring in unloaded condition is known as
3. if the efficiency of screw jack is more than 50% then it is called .
4. if the efficiency of screw jack is less than 50% then it is called .
5. it is defined as load required per unit deflection
6. when friction angle is less than helix angle then torque required to raise the load is
8. it is one of the failure of spring
10. it is axial distance between adjacent coil.