Class VII

Sea and land breezes are due to
  1. conduction
  2. convection
  3. radiation
  4. expansion
Homes and buildings are kept well ventilated by making use of
  1. conduction
  2. convection
  3. radiation
  4. convection currents
If one part of fluid is heated it
  1. expands
  2. less denser
  3. rises
  4. all of them
In bridges to overcome expansion there is use of
  1. rollers
  2. sliding joints
  3. both a and b
  4. allowance
Blocks of concrete which are few meters long are laid with gaps to overcome
  1. expansion
  2. conduction
  3. convection
  4. radiation
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