Point out the incorrect statement among the options?
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Answer: B. For calculating forces and efficiency of riveted joint, either rivet diameter or rivet hole
Explanation
Riveted joint strength calculations must account for the actual metal cross-section removed by drilling operations. The diameter of the rivet hole is larger than the nominal shank diameter to allow fastener insertion. Using nominal rivet diameter instead of hole diameter underestimates material removal in strength calculations. Rivets are mechanical fasteners used historically to join structural steel plates in bridges and pressure vessels. Hole clearance tolerances ensure that hot or cold driven rivets fit properly into structural member alignments. Design codes specify exact geometric parameters for rivet pitch, edge distance, and hole diameter dimensions.
Although welded construction has largely replaced riveting, understanding joint mechanics remains vital for historical restoration. Pressure vessel safety standards require precise calculation of joint efficiencies to prevent catastrophic structural rupture. Structural inspectors check riveted connections carefully for signs of stress concentration and fatigue cracking. Option A correctly defines the geometric classification threshold distinguishing thin-walled from thick-walled pressure vessels. Option C correctly states that longitudinal seams utilize butt joints to preserve uniform cylindrical vessel geometry. Option D correctly describes opening size limits that bypass complex reinforcement calculations in pressure vessels.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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