Reta Book 2 Chapter 1 questions with
complete solutions
1- Which of the following factors below does not affect heat transfer - correct answer ✔✔
Density.
2-An example of a poor conductor of heat is. - correct answer ✔✔ Wood.
3- Thermal conductivity ('k') is - correct answer ✔✔ The number of BTUs that will pass in one
hour through a material 1'' thick with an area 1ft2 if the temperature difference from one side
to the other is 1'f
4-Which is not a source of fouling of a heat exchanger surface - correct answer ✔✔ Water.
5- Which is a true statement - correct answer ✔✔ The higher the k factor the greater the
thermal conductivity
6- Optimum U factor for the given material that the heat exchanger is made of the results when
- correct answer ✔✔ There is no impeding substance such as ice dirt or oil on the surfaces of
the heat exchanger tubes.
7- When air flow is decreased across a heat exchange surface,cooling capacity is - correct
answer ✔✔ Reduced
8-Centrifugal fans have advantage over propeller fans in that they............ than prop fans. -
correct answer ✔✔ Are quieter
complete solutions
1- Which of the following factors below does not affect heat transfer - correct answer ✔✔
Density.
2-An example of a poor conductor of heat is. - correct answer ✔✔ Wood.
3- Thermal conductivity ('k') is - correct answer ✔✔ The number of BTUs that will pass in one
hour through a material 1'' thick with an area 1ft2 if the temperature difference from one side
to the other is 1'f
4-Which is not a source of fouling of a heat exchanger surface - correct answer ✔✔ Water.
5- Which is a true statement - correct answer ✔✔ The higher the k factor the greater the
thermal conductivity
6- Optimum U factor for the given material that the heat exchanger is made of the results when
- correct answer ✔✔ There is no impeding substance such as ice dirt or oil on the surfaces of
the heat exchanger tubes.
7- When air flow is decreased across a heat exchange surface,cooling capacity is - correct
answer ✔✔ Reduced
8-Centrifugal fans have advantage over propeller fans in that they............ than prop fans. -
correct answer ✔✔ Are quieter
