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Physics 9 Chapter 8 - Thermal Properties of Matter -31
At which time, bridges made of steel girders contract?
a) At day
b) At after noon
c) At noon
d) At night
In which of the following thermal expansion is used in temperature measurements?
b) Fluorescent tube
c) 100W bulb
In thermometer, which of the following process is used for temperature measurements?
c) Thermal expansion
To open the cap of a bottle that is tight enough, immerse it in ...................for a minute or so?
a) Hot petrol
b) Cold petrol
c) Cold water
d) Hot water
If we immerse the cap of a bottle in hot water, what happens?
a) Cap explode
b) Cap contract
c) Cap expands
d) Cap constricts
To join steel plates tightly together, which of the following are forced through holes in the plates?
a) Blue hot rivets
b) Pink hot rivets
c) Green hot rivets
d) Red hot rivets
What happens to rivets on cooling?
b) No effect
The strips of bimetal strips are made of..............?
c) None of these
Which of the following metal is present in bimetal strip?
How many strips are present in a bimetal strip?
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