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Tell me what Are Three Methods Of Heat Transfer?

Answer:

Three methods of heat transfer are conduction, convection and radiation.

☛ Conduction: The transfer of energy by collisions between the atoms and molecules in a material.
☛ Convection: Transfers heat when particles move between objects or areas that differ in temperature.
☛ Radiation: The transfer of energy by waves.

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During suction stroke the pressure inside the cylinder is
a. Equal to atmospheric pressure
b. Above atmospheric pressure
c. Above or below atmospheric pressure
d. Below atmospheric pressure		Do you know an Injector Pressure In Heavy Vehicles? Why It Is Used?