# Laws of Heat Transfer - Convection - MCQs with Answers

## Laws of Heat Transfer - Convection - MCQs with Answers

Q1. What is the correct formula for the rate of heat transfer by convection form a surface of area A at temperature T to the surrounding fluid at temperature T0?

Where h is convection heat transfer coefficient

a. qc = h A (T – T0)4
b. qc = h A (T4 – T04)
c. qc = h A (T – T0)
d. none of the above

ANSWER: c. qc = h A (T – T0)

Q2. What is the mode of heat transfer from the hot surface to the adjacent layer of fluid which surrounds the surface?

a. conduction mode of heat transfer
b. radiation mode of heat transfer
c. convection mode of heat transfer
d. none of the above

ANSWER: a. conduction mode of heat transfer

Q3. Convective heat transfer coefficient is also known as

a. film convection factor
b. film coefficient
c. film conductance
d. none of the above

Q4. Suppose a hot water is placed inside a closed metal vessel of thickness 5 mm. There is atmospheric air outside the vessel at temperature lower than the temperature of hot water. The heat is transferred from the hot water to atmospheric air. What is the mode of heat transfer in this condition?

a. conduction then convection
b. convection then conduction
c. convection then conduction then convection
d. conduction then convection then conduction