Quiz on Stub-in & Stub-on Connections Welcome to your Quiz on Stub-in & Stub-on Connections 1. When a hole is made in pipe to take tapping, it becomes weaker True False 2. Stub-in & Stub-on are weaker connections True False 3. Stub-in Connection is fabricated by making larger hole than the branch connection? True False 4. Stub-on Connection is fabricated by making larger hole than the branch connection? True False 5. When there is difference of more than 1 size between header pipe & branch connection Stub-in connection is used Stub-on Connection is used 6. Hole required in header pipe is equal to the inside diameter of Branch in Stub-in Connection Stub-on Connection 7. Branch pipes go inside the header pipe in Stub-in Connections Stub-on Connections 8. Branch pipe goes only up to the outer pipe of Header pipe in Stub-in connection Stub-on Connections 9. Weld Strength is more in Stub-in Connection Stub-on Connection 10. Branch to header size connection is done with Butt welding in Stub-in Connection Stub-on Connection 11. Branch to header size connection is done with Fillet welding in Stub-in Connection Stub-on Connection 12. Which of the following can handle higher pressures Stub-in Connection Stub-on Connection 13. Why Stub-in connections are weaker than Stub-on Because of bigger hole Fillet welds are weaker than Buttwelds Both of the above None of the above 14. We go for branch fittings, if both Stub-in & Stub-on connections are not suitable True False 1 out of 7
