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Englisch Unit 4-6 Flashcards | StudBud
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Englisch Unit 4-6
What are tasers used for?
The clockwork radio can run for 30 minutes after winding.
Englisch Unit 4-6
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Englisch
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Questions
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Answers
1
The clockwork radio can run for 30 minutes after winding.
True
False
2
What are tasers used for?
To incapacitate suspects without serious injury
To shine light
To identify faces
To track criminals
3
Pulleys in the radio are noisier than gears.
False
True
4
Which is a disadvantage of CCTV cameras that use videotapes?
Too clear image
Very expensive
People forget to change tapes
Cannot be monitored
5
What is a disadvantage of concealed security tags?
They spoil clothes
Thieves can easily see them
They're too cheap
Sales staff may forget to deactivate them
6
Which of the following is a knife-proof item?
Body vest
Torch
GPS tracker
Radio
7
Which material is used for bike helmets due to its strength and light weight?
Titanium
Polystyrene and polycarbonate
Kevlar
Aluminium
8
What is the main disadvantage of aluminium in bike frames?
It's too heavy
It's very expensive
It's hard to shape
It breaks easily when bent too much
9
What does the winding handle on the clockwork radio do?
Starts the gears
Activates the pulley
Winds up the spring
Generates electricity
10
Anti-virus software is used to tag criminals.
True
False
11
How many turns does it take to fully wind the spring in the clockwork radio?
60
100
45
30
12
Steel is flexible but breaks easily.
False
True
13
Which of these is a component in the clockwork radio?
Spark plug
Steel spring
Fuel injector
Crankshaft
14
What does the Flascam system do when it detects a group in a restricted area?
Silently tracks them
Activates a flash and loud shout
Sprays tear gas
Sends a text alert
15
Helmets are used for head protection.
False
True
16
Which device can admit only the right people into secure areas?
RFID tag
Anti-virus software
Face-recognition device
X-ray scanner
17
Which of the following sports equipment is made from graphite composites?
Ice skates
Football
Tennis racket
Kayak
18
Trevor Baylis also invented an electric shoe.
True
False
19
Which material is used to make the bearing because it is hard?
Titanium
Steel
Carbon fibre
Kevlar
20
What year did Trevor Baylis invent the clockwork radio?
2001
1975
1981
1991
21
Which motion is described as ‘in a straight line’?
Linear
Reciprocating
Oscillating
Rotary
22
What is the main function of a Stirling engine?
Pumps fuel
Burns fuel directly
Converts temperature difference into movement
Uses electric current
23
What is the function of GPS in crime-fighting?
Help people know exactly where they are
Head protection
Criminal identification
Monitor conversations
24
A bike frame made of aluminium alloy is light but tends to break when bent too much.
True
False
25
The clockwork radio requires batteries to operate.
False
True
26
Which material is often used to make the tyres of a bike?
Nylon
Steel
Fibreglass
Rubber
27
What powers the radio once the spring unwinds?
Battery pack
Gears and generator
Small motor
Pulley only
28
What is the voltage output of the clockwork radio's generator?
3V
9V
12V
5V
29
Kevlar is used in rider clothing because it is weak and cheap.
False
True
30
Carbon fibre is light, strong, and very expensive.
True
False
31
What is a key advantage of titanium used in bike frames?
It's very flexible
It's cheap
It's made of recycled materials
It's corrosion-resistant and has high strength-to-weight ratio
