Test 3: Complete Chapter – Concepts, Applications and Details

Question 1

In thermometers, thermal expansion in a narrow tube helps in:

• Athe measurement of temperature
• Breducing pressure
• Cproducing light
• Dcooling liquids

Question 2

A stuck metal lid on a glass jar becomes easier to open when warm water is run over it because the lid:

• Aexpands slightly
• Bcontracts
• Cmelts
• Dbecomes lighter

Question 3

Warning labels and pressure relief valves on aerosol or propane containers are provided because:

• Agases expand when heated and pressure can build up causing explosions
• Bgases contract in sunlight
• Cliquids evaporate at room temperature only
• Dmetals melt in sunlight

Question 4

Flexible joints and loops are used in piping systems to:

• Aabsorb the movement due to expansion and contraction
• Bincrease water pressure
• Ccool the water
• Dreduce water flow

Question 5

In Fig. 10.4 (a), the balloon shrinks because of:

• Acontraction of air on cooling
• Bexpansion of air on heating
• Cevaporation of water
• Dcondensation of balloon