Heat Transfer - Jamb Physics Past Questions and Answers

Question 11:

• JAMB 1986

The mode of heat transfer which does not require a material medium is

A. Conduction
B. Radiation
C. Convection
D. Propagation

Question 12:

• JAMB 1987

The vacuum in a thermos flask helps to reduce heat transfer by?

A. Convection and radiation
B. Convection and conduction
C. Conduction and radiation
D. Radiation only

Question 13:

• JAMB 1987

Which of the following phenomena explains the fact that a house whose roof is coated with white paint will be cooler in the hot season than one coated with black paint ?

A. Conduction
B. Convection
C. Refraction
D. Reflection

Question 14:

• JAMB 1988

When heat is applied to one end of a metal rod, the molecules at the other end soon begin to vibrate with greater amplitude than before because heat has been transferred by

A. Radiation
B. Convection
C. Conduction
D. Evaporation

Question 15:

• JAMB 1990

Which of the following statements? i. land and sea breezes are natural convection currents. ii. convection may occur in liquids or gasses but not in solids. iii. the vacuum in a thermos flask prevents heat loss due to convection only.

A. I and ii only
B. I and iii only
C. I and iii only
D. I, ii, and iii