Bridge is not a machine, it is a structure.
A bridge is a structure built to span a physical obstacle, such as a body of water, valley, or road, without closing the way underneath. It is constructed for the purpose of providing passage over the obstacle, usually something that can be detrimental to cross otherwise.
17) What is NOT an example of a machine ?
Answer is:
Bridge
Explanation:
Related Lifting Appliances MCQ with Answers
Answer is:
The threads increase the distance a force is applied
Answer is:
output force is 4 times the effort
Answer is:
3
Answer is:
Helical tension spring
Explanation:
Helical tension spring resists a tensile load applied by means of a suitable end form, hook or loop.
Tension helical springs, also known as extension springs, are comprised of tightly wound helical coils that are designed to operate in the direction of the tension. The spring stretches to a particular length when a force is applied to it. These springs have hooks at both its ends, and are attached to the product. When components attached to the spring are pulled apart from either sides, the spring tries to hold itself together to resist pulling, thereby causing the springing action. When no force is applied, the loops of spring are touching a hook, or loop on the other end. These springs are generally used to deliver return force to the components that are extended.
