1. The transfer of heat from one region to another by fluid motion due to changes in the fluid's density as more heat is added to one region than the other.
a. heat transfer
b. convection
C. conduction
d. radiation

2. The transfer of energy from an area or an object with higher temperature to an area or object with lower temperature.
a. heat transfer
b. convection
C. conduction
d. radiation

3. Devices that transform thermal energy or heat into mechanical energy or work.
a. steam engine
b. heat engine
c. gasoline engine
d. diesel engine

4. It operates when water is made to vaporize by a boiler.
a. steam engine
b. heat engine
c. gasoline engine
d. diesel engine

5. It only air is taken in during the intake.
a, steam engine
b. heat engine
c. gasoline engined.
d. diesel engine

6. A mixture of air and fuel is compressed by the piston during intake.
a steam engine
b. heat engine
c. gasoline engine
d. diesel engine​​