Whole Course

Question 1

State the 2 types of gear chains

Answer 1

Simple and compound gear chains

Question 2

State the type of control that has no feedback

Answer 2

Open loop control

Question 3

State the type of control that does have feedback

Answer 3

Closed loop control

Question 4

Describe the function of a transistor

Answer 4

Acts as a switch

Question 5

State the name of the left bit of a transistor

Answer 5

Base

Question 6

State the name of the top right bit of a transistor

Answer 6

Collector

Question 7

State the name of the bottom right bit of a transistor

Answer 7

Emitter

Question 8

Describe 2 environmental impacts of using solar as a source of energy

Answer 8

• It does not produce greenhouse gases
• Habitat is destroyed and wildlife disrupted

Question 9

Describe the purpose of a “go to start” button at the end of a flowchart

Answer 9

Create a continuous loop

Question 10

Describe the purpose of replacing a resistor with a variable resistor

Answer 10

The resistance of the variable resistor can be changed which will change the ___

Question 11

Describe 2 advantages of using computer simulation to test a logic circuit before constructing a prototype

Answer 11

• No risk of damage to the user
• Quicker to assemble the circuit

Question 12

State the nature of the force created when something is pulling something

Answer 12

Tension

Question 13

Describe an advantage of using a microcontroller instead of a hard wired circuit

Answer 13

It is reprogrammable

Question 14

Explain the impact of using hydropower on climate change

Answer 14

Once in use hydropower does not emit any greenhouse gases so does not contribute to global warming

Question 15

Explain the difference in the size of instroke and outstroke forces of a piston

Answer 15

The two areas are different so the outstroke force is larger

Question 16

Describe a way to reduce the wear on components due to friction

Answer 16

Lubricate the parts

Question 17

Describe a piece of information that should be included on a free body diagram

Answer 17

Direction of a force

Question 18

State the name of the component that could be used to protect the transistor from a large input current

Answer 18

Fixed resistor

Question 19

Describe the function of main air

Answer 19

Air that operates a piston

Question 20

Describe the function of pilot air

Answer 20

Air used to actuate a valve

Question 21

How can the efficiency of a gear chain be improved?

Answer 21

Lubricate the gears to reduce friction

Question 22

Explain why using solar panels contributes to limiting climate change

Answer 22

Using solar panels does not use fossil fuels so no greenhouse gases will be released

Question 23

Describe how to make a double-acting cylinder outstroke slowly and smoothly

Answer 23

Add a uni-directional restrictor in the instroking pipe of the double acting cylinder

Question 24

Describe 2 advantages of connecting lamps in parallel

Answer 24

• If one lamp fails the rest will remain on
• All lamps will be maximum brightness

Question 25

Explain an advantage of using computer simulation when designing a circuit

Answer 25

No risk of damage to the user as any faults are only simulate

Question 26

Explain the switching function of a transistor

Answer 26

When an appropriate input signal is applied to the base an output current will flow at the collector or emitter

Question 27

State the 4 types of motion

Answer 27

- Linear - Rotary - Reciprocating - Oscillating

Question 28

Define linear motion

Answer 28

Moves something in a straight line like a train

Question 29

Define rotary motion

Answer 29

Moves around a centre point like a wheel

Question 30

Define reciprocating motion

Answer 30

Repeated back and forth movement like a piston

Question 31

Define oscillating motion

Answer 31

Curved back and forth movement that swings on a centre point like a pendulum

Question 32

State the term used to describe when forces acting on a structure are balanced

Answer 32

Equilibrium

Question 33

Describe one advantage of using a microcontroller instead of a hard wired circuit

Answer 33

It is reprogrammable