Today's Mini Test

Here are the questions and answers for today's mini test:

1. Name and draw the schematic diagram for two mechanisms which transmit motion through 90.

2. Name this mechanism and state its purpose:

Ratchet and Pawl - allows movement in one direction only.

3. Calculate the velocity ratio of this mechanism:

 

4. If the motor in the above system is turning at 500 rev/min, how fast is the output turning?

5. Work out the torque of this motor:

6. Calculate the reaction forces:

7. Name and draw three types of belt which could be used in a belt and pulley system.

8. What could you add to a belt and pulley system which has stretched and become loose?

Tensioner or jockey wheel