GK Questions on Heat & Temperature

GK Questions

Q.8 How will a metal container full of hot water in vacuum lose heat?

(A) by conduction

(B) by convection

(C) by radiation

(D) will stay hot forever

Q.9  A block of ice

(A) cannot radiate heat

(B) can radiate heat but cannot absorb heat

(C) can absorb heat but cannot radiate heat

(D) can radiate as well as absorb heat

Q.10 As a solid undergoes a phase change to a liquid state, it

(A) releases heat while remaining at a constant temperature.

(B) absorbs heat while remaining at a constant temperature.

(C) releases heat as the temperature decreases.

(D) absorbs heat as the temperature increases.

Q.11 A cup of hot tea on a metal table in a room loses heat by

(A) Conduction

(B) Convection

(C) Radiation

(D) All the above

Q.12 Which among the following is true of a sphere, a cube and circular plate of a same material and same mass heated to the same temperature?

(A) Sphere cools the slowest

(B) Circular plate cools the fastest

(C) Cube cools the fastest

(D) Circular plate cools the slowest

Q.13 At what temperature are the Celsius and Fahrenheit equal?

(A) + 40o

(B) - 40o

(C) - 0o

(D) + 100o

Q.14 What would happen to a hole in a metal sheet when the sheet is heated?

(A) It decreases in size

(B) It increases in size

(C) No change is seen

(D) First increases and then decreases

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