Eduqas A-Level Product Design product analysis and systems overview quiz quiz

Calculate the gear ratio of a simple gear train by dividing the total number of teeth on the driven gear by the number on the driver gear

Wire a potential divider so that the output voltage is taken across one of the two resistors in the circuit

Analyse a product systematically under headings such as Aesthetics, Cost, Customer, Environment, Size, Safety, Function and Materials

Heat-treat steel by quenching and then tempering it to control its final hardness and toughness

Tension on top and compression on the bottom

Compression throughout

Tension throughout

Compression on top and tension on the bottom

20 N m

12.5 N m

90 N m

0.008 N m

It adds a great deal of extra material to the frame, which is what carries the increased load

Triangles are rigid and cannot be distorted, unlike rectangles which rack into parallelograms

It makes the frame much heavier, and the extra weight is what gives it the added strength

It changes the material the frame is made from to a stiffer and stronger one altogether

First class (pivot in the middle)

Third class (effort in the middle)

Second class (load in the middle)

No lever can

0.33

0.8

12

3

3:1, output slower with more torque

1:3, output faster with less torque

1:1, no change

3:1, output faster with more torque

Transmit rotary motion between two parallel shafts completely unchanged, like a pair of meshing spur gears

Convert rotary motion into reciprocating or oscillating motion, with the cam profile setting the movement

Multiply an input force in the way that a lever does, by using a long effort arm and a short load arm

Store electrical charge in the way that a capacitor does within an electronic control circuit

Temperature

Sound

Light level

Pressure

8.1 V

4.5 V

9 V

0.9 V

Because the control circuit supplies too little current to drive the motor directly; the transistor or relay switches the larger current from a separate supply

To make the motor spin backwards, by reversing the direction of the current that flows through its windings whenever the control circuit changes its output state

To slow the motor down, by reducing the voltage that the control circuit is able to deliver to it

To change the colour of the motor casing so that it matches the rest of the finished product

It can never be reprogrammed once it leaves the factory, so its behaviour is permanently fixed in the hardware itself

Its behaviour is set in software, so it can be changed without rewiring, and one chip replaces many components

It needs no power supply of any kind to run its stored program and drive the connected outputs

It removes the need for any output devices, since the chip itself performs the product's function