Heat exchangers
  • 1. Which type of heat exchanger uses a set of parallel tubes to transfer heat?
A) Plate
B) Double-pipe
C) Shell and tube
D) Finned tube
  • 2. Which material is commonly used for the construction of heat exchanger tubes?
A) Copper
B) Steel
C) Aluminum
D) Plastic
  • 3. What is used to enhance heat transfer in a heat exchanger by increasing surface area?
A) Fins
B) Gaskets
C) Valves
D) Bearings
  • 4. What helps maintain efficient heat transfer by preventing fouling in a heat exchanger?
A) Higher flow rate
B) Increased pressure
C) Regular cleaning and maintenance
D) Less insulation
  • 5. What is the function of the header in a shell and tube heat exchanger?
A) Reduce pressure
B) Separate hot and cold fluids
C) Control temperature
D) Distribute the fluid evenly to the tubes
  • 6. What is meant by the term 'heat exchanger fouling'?
A) Decrease in fluid velocity
B) Increase in heat transfer rate
C) Accumulation of deposits on heat transfer surfaces
D) Expansion of tube material
  • 7. What is the purpose of the bypass valve in a heat exchanger system?
A) Regulate pressure
B) Control flow rate through the exchanger
C) Remove air from the system
D) Increase heat transfer
  • 8. What is the function of the expansion valve in a refrigeration system?
A) Increase the pressure of the refrigerant
B) Remove moisture from the system
C) Cool the refrigerant
D) Regulate the flow of refrigerant into the evaporator
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