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Science MCQs

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2100
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Question 1171 Medium

What is riveting?

A
Joining metal plates using hot rivets
B
Measuring temperature
C
Insulating heat
D
Expanding metals
Question 1172 Medium

Why are metal tyres heated before fixing on wheels?

A
To expand and fit tightly when cooled
B
To soften the metal
C
To make them lighter
D
To clean them
Question 1173 Medium

How does a vacuum flask keep liquids hot?

A
By reducing heat transfer
B
By producing heat
C
By absorbing heat
D
By reflecting all light
Question 1174 Medium

What is the purpose of double glazing in windows?

A
To reduce heat transfer
B
To increase light
C
To decorate
D
To strengthen glass
Question 1175 Medium

What causes air bubbles to form when heating a flask in water?

A
Air contracts
B
Water boils
C
Flask cracks
D
Air expands and escapes
Question 1176 Medium

What is the role of rollers in bridge construction?

A
For aesthetics
B
To support weight
C
To reduce cost
D
To allow expansion and contraction
Question 1177 Medium

What is the main reason metals are good conductors?

A
Low mass
B
Vibrating atoms
C
High density
D
Free electrons
Question 1178 Medium

Which scale has 180 divisions between fixed points?

A
Rankine
B
Celsius
C
Kelvin
D
Fahrenheit
Question 1179 Medium

What is 0°C in Fahrenheit?

A
100°F
B
0°F
C
212°F
D
32°F
Question 1180 Medium

What is 100°C in Fahrenheit?

A
373°F
B
100°F
C
32°F
D
212°F
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