Reta Book 2 Chapter 1 Exam Test
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
9-The operating engineer -Correct Answer ✔ ✔ Cannot change the
K factor of the metal but has some control of the overall U factor for
the evaporator as a unit.
10-The limiting factor of an evaporator's capacity that the operator
can't control is -Correct Answer ✔ ✔ Evaporator size.
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
9-The operating engineer -Correct Answer ✔ ✔ Cannot change the
K factor of the metal but has some control of the overall U factor for
the evaporator as a unit.
10-The limiting factor of an evaporator's capacity that the operator
can't control is -Correct Answer ✔ ✔ Evaporator size.
