The following are examples of mechanism except:

Here are the answers to the questions:

16. The question asks for an example that is not a mechanism. However, a gear system, cams and follower, chain system (e.g., chain drive), and pulley system are all generally considered examples of mechanisms as they transmit or transform motion and force. Given that all options are mechanisms, the question is flawed. If forced to choose the least fitting, sometimes "Chain System" might be interpreted as just the component (the chain) rather than the entire drive mechanism, but this is a weak distinction. Based on standard definitions, all are mechanisms.

    • C) Chain System (Acknowledging that all options are generally considered mechanisms, this choice is made under the assumption of a subtle, potentially flawed, distinction intended by the question setter.)

17. A common application of a screw jack is to lift heavy loads with minimal input force. Screw jacks provide a significant mechanical advantage, converting rotational input into powerful linear output.

    • A) Lift heavy loads with minimal input force

18. A crank mechanism (crankshaft and connecting rod) is a fundamental component in internal combustion engines, converting the reciprocating motion of pistons into rotary motion.

    • B) Internal combustion engines

19. The choice of mechanism for a particular job depends on factors like its functionality (how to use it), its cost, and its availability. The tools to fix the mechanism are a consideration for maintenance, but not a primary factor in the initial choice of the mechanism for a job.

    • A) The tools to fix the mechanism

20. Figure 1 shows a tool with a stock, a beam, and two adjustable pins. This tool is specifically designed to mark two parallel lines simultaneously, which is the function of a mortise gauge.

    • B) Mortise gauge