BM3 Exchangers Ch 4

What are tubesheets typically made from?

• a) Forged discs or plate
• b) Rolled bars
• c) Cast iron
• d) Steel sheets

What is the purpose of grooves in tubesheets?

• a) To reduce weight
• b) To lock tubes in place
• c) For aesthetic purposes
• d) To increase heat transfer

When are holes drilled in a tubesheet?

• a) Before machining
• b) After machining
• c) During assembly
• d) After heat treatment

Why are tubesheets stack drilled in double tubesheet exchangers?

• a) To save time
• b) To ensure hole alignment
• c) To prevent burrs
• d) To create grooves

What is the purpose of reaming tube holes?

• a) To enlarge the holes
• b) To add grooves
• c) To remove burrs and achieve precise diameter
• d) To reduce wall thickness

What does TEMA specify about tube hole edges?

• a) They must have burrs
• b) They must be beveled
• c) They must be free of burrs
• d) They must be rounded

What does TEMA Class R require for tube hole grooves?

• a) Single groove only
• b) Two grooves of specific width and depth
• c) Four grooves of varying depth
• d) Grooves only for tubes smaller than 5/8"

What type of bolts allow the bundle to be bolted to the shell independent of the channel head?

• a) Shoulder bolts
• b) Stud bolts
• c) Hex bolts
• d) Socket head bolts

What diameter tolerance is used to prevent work-hardening during tube expansion?

• a) Loose fit tolerance
• b) Standard fit tolerance
• c) Special close fit tolerance
• d) Tight tolerance

What does drill drift refer to in tube manufacturing?

• a) Misalignment of drill holes
• b) Overlapping of drilled holes
• c) Excessive burrs
• d) Drill speed issues