AQA GCSE Engineering: Systems overview quiz quiz

Sensor, motor, battery

Start, decision, stop

Input, process, output

Brief, specification, evaluation

A closed loop has no feedback at all; an open loop is the one that self-corrects

They are really exactly the same thing as each other

An open loop system always has to use a microcontroller chip

A closed loop uses feedback to self-correct; an open loop has no feedback

A thermostat keeping a room at a set temperature

A timed toaster that pops up after a fixed set time

A torch that is switched on and off by hand

A doorbell that is pressed once by a visitor

Linear, circular, vibrating and spinning motion

Linear, rotary, reciprocating, oscillating

Push, pull, twist and bend movement

Input, process, output and feedback

Rotary turning motion

Oscillating along a curve

Reciprocating

Linear in one direction

A pair of spur gears

A pulley and belt

A simple lever

A cam and follower

$3:1$, so the output turns three times slower

$1:3$, so the output turns three times faster

$1:1$, so the speed is unchanged

$2:1$, so the output turns twice as fast

A transistor used as a switching device

A light-dependent resistor (LDR)

An LED that gives out light

A buzzer that makes a sound

Input: transistor; process: LDR; output: LED

Input: LED; process: transistor; output: LDR

Input: LDR; process: transistor; output: LED

Input: LDR; process: LED; output: transistor

It is only an output component whose job is to make light for the user

It is only an input sensor that detects changes in the surroundings

It simply supplies all of the electrical power needed to drive the rest of the circuit

It is the process stage: it reads inputs, runs a stored program and switches outputs

A diamond

A rectangle

A parallelogram

A rounded rectangle (terminator)

It can never be reprogrammed once it has been built into a circuit

Its behaviour is changed by reprogramming rather than rewiring

It is completely unable to make any decisions on its own

It always uses far more components than a fixed-wired circuit