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Physics 9 Chapter 8 - Thermal Properties of Matter -31
1.
At which time, bridges made of steel girders contract?
a) At day
b) At after noon
c) At noon
d) At night
2.
In which of the following thermal expansion is used in temperature measurements?
a) Thermometer
b) Fluorescent tube
c) 100W bulb
d) Telescope
3.
In thermometer, which of the following process is used for temperature measurements?
a) Convection
b) Conduction
c) Thermal expansion
d) Radiation
4.
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
5.
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
6.
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
7.
What happens to rivets on cooling?
a) Contract
b) No effect
c) Explode
d) Expand
8.
The strips of bimetal strips are made of..............?
a) Metalloids
b) Metal
c) None of these
d) Non-metal
9.
Which of the following metal is present in bimetal strip?
a) Copper
b) Aluminium
c) Brass
d) Tungsten
10.
How many strips are present in a bimetal strip?
a) Five
b) Three
c) Four
d) Two
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