Plumbing Test question with complete solution rated A+ already passed 2023

Plumbing Test question with complete solution rated A+ already passed 2023 Which of the following traps are permitted by special permission? A. bell B. S C. drum D. crown vented trap - correct answer C A roof mounted ari conditioner unit is condensing at the rate of 5 GPM. How much DFU? A. 4 B. 5 C. 10 D. 12 - correct answer B According to the International Plumbing Code, when plastic piping is installed in a concealed location and passing through a stud joist or rafter, the piping may not pass any closer than ___ inches from the edge of the wood member. A. 3/4 B. 1 C. 1 1/4 D. 1 1/2 - correct answer D The measured length along the centerline of the pip and its fittings is? A. true length B. measured length C. developed length D. actual length - correct answer C What is the approximated number of threads for a 2 1/2" schedule 40 pipe which will be used in a fuel gas piping system? A. 9 B. 10 C. 11 D. 12 - correct answer D .43 PSI = How many Feet of Head? A. 1 B. 2.31 C. 4.4 D. 43 - correct answer A What is the PSI at the bottom of the drainage pipe if the test for a 4" drainage system is 30' of head? A. 15 psi B. 14 psi C. 13 psi D. 12 psi - correct answer D PSI = feet of head x .433 30 (feet of head) x .433 = 12.99 When gas piping is installed through wood studs and is less than 1 1/4" from the nearest end of the stud, the point of passage shall be protected with a face plate not less than ___. A. 1/32 B. 1/16 C. 3/32