WAEC Physics questions: Heat transfer

10 questions with answers and explanations. Tap an option to check yourself.

1. Question 1· Heat transfer· WAEC

   A sea breeze blows during the day because

   • Athe sea is warmer than the land
   • Bthe land heats faster, warm air rises and cooler sea air moves in
   • Cthe wind comes from the moon
   • Dthere is no convection

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   Explanation and discussion

2. Question 2· Heat transfer· WAEC

   A vacuum flask reduces heat loss by radiation using

   • Aplastic case
   • Ba cork
   • Ca vacuum
   • Dsilvered walls

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   Explanation and discussion

3. Question 3· Heat transfer· WAEC

   Cooking pots have wooden or plastic handles because these materials are

   • Apoor conductors of heat
   • Bgood conductors of heat
   • Cheavy
   • Dshiny

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   Explanation and discussion

4. Question 4· Heat transfer· WAEC

   During the day, a breeze blows from the sea to the land because

   • Athe sea heats up faster than the land
   • Bthe land heats up faster than the sea
   • Cthe moon pulls the air
   • Dthe sun sets over the sea

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   Explanation and discussion

5. Question 5· Heat transfer· WAEC

   A vacuum flask reduces heat loss by conduction and convection mainly because of the

   • Avacuum between its double walls
   • Bsilvered walls
   • Ccork stopper
   • Dplastic case

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   Explanation and discussion

6. Question 6· Heat transfer· WAEC

   Convection cannot take place in

   • Asolids
   • Bliquids
   • Cgases
   • Dair

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   Explanation and discussion

7. Question 7· Heat transfer· WAEC

   The transfer of heat by the movement of the heated fluid itself is

   • Aconduction
   • Bconvection
   • Cradiation
   • Dinsulation

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   Explanation and discussion

8. Question 8· Heat transfer· WAEC

   On a hot afternoon in Kano, heat passes through the thickness of a metal roof sheet mainly by

   • Aevaporation
   • Bradiation
   • Cconvection
   • Dconduction

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   Explanation and discussion

9. Question 9· Heat transfer· WAEC

   In a vacuum flask the silvered walls reduce heat loss by

   • Aconduction
   • Bradiation
   • Cconvection
   • Devaporation

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   Explanation and discussion

10. Question 10· Heat transfer· WAEC

    Heat from a fire reaches a person sitting beside it mainly by

    • Aconvection
    • Bconduction
    • Cradiation
    • Devaporation

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    Explanation and discussion