Heat Chapter – Previous Year MCQs JKTET,JKSSB,RRB & NTSE Level)

 

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Heat Chapter – Previous Year MCQs (RRB & NTSE Level)

1. The SI unit of heat energy is
   A. Calorie
   B. Joule
   C. Watt
   D. Kelvin
   Answer: B

2. The instrument used to measure temperature is
   A. Barometer
   B. Thermometer
   C. Hygrometer
   D. Calorimeter
   Answer: B

3. Heat is a form of
   A. Matter
   B. Energy
   C. Force
   D. Power
   Answer: B

4. The SI unit of temperature is
   A. Celsius
   B. Fahrenheit
   C. Kelvin
   D. Joule
   Answer: C

5. The temperature at which Celsius and Fahrenheit scales show the same reading is
   A. −40°C
   B. 0°C
   C. 100°C
   D. −32°C
   Answer: A

6. Which mode of heat transfer does not require a material medium?
   A. Conduction
   B. Convection
   C. Radiation
   D. Evaporation
   Answer: C

7. In solids, heat is mainly transferred by
   A. Conduction
   B. Convection
   C. Radiation
   D. Reflection
   Answer: A

8. The process of transfer of heat in liquids and gases is called
   A. Conduction
   B. Convection
   C. Radiation
   D. Sublimation
   Answer: B

9. Land breeze occurs during
   A. Day
   B. Night
   C. Afternoon
   D. Noon
   Answer: B

10. The boiling point of water at standard atmospheric pressure is
    A. 0°C
    B. 50°C
    C. 100°C
    D. 212°C
    Answer: C

11. The amount of heat required to raise the temperature of 1 kg of a substance by 1°C is called
    A. Latent heat
    B. Specific heat capacity
    C. Thermal conductivity
    D. Heat capacity
    Answer: B

12. The heat required to change 1 kg of a solid into liquid at its melting point without change in temperature is
    A. Specific heat
    B. Sensible heat
    C. Latent heat of fusion
    D. Latent heat of vaporization
    Answer: C

13. The device used to measure heat changes during chemical reactions is
    A. Thermometer
    B. Calorimeter
    C. Barometer
    D. Hygrometer
    Answer: B

14. The good conductor of heat among the following is
    A. Wood
    B. Plastic
    C. Copper
    D. Air
    Answer: C

15. The expansion of solids on heating is known as
    A. Contraction
    B. Radiation
    C. Thermal expansion
    D. Compression
    Answer: C

16. The unit of specific heat capacity is
    A. J/kg°C
    B. J/kg
    C. kg/J
    D. J°C
    Answer: A

17. Black surfaces are good absorbers and
    A. Poor radiators
    B. Good radiators
    C. Poor conductors
    D. Good insulators
    Answer: B

18. When a liquid changes into gas at all temperatures, the process is called
    A. Boiling
    B. Melting
    C. Evaporation
    D. Condensation
    Answer: C

19. The transfer of heat from hotter body to colder body continues until
    A. Both bodies reach same temperature
    B. Hot body cools completely
    C. Cold body becomes hot
    D. Heat disappears
    Answer: A

20. Sea breeze occurs during
    A. Night
    B. Morning
    C. Day
    D. Midnight
    Answer: C