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**1. ASME B 16.5 does not cover:**

**a. Class 150 flanges **

**b. Class 300 flanged fittings **

**c. Butt welded pipe caps **

**d. All of the above**

**2. The maximum hydrostatic test pressure permitted for a flange in a system hydrostatic test is:**

**a. Not required **

**b. Conducted at 1.5 x class rating @100°F **

**c. Conducted at 25 psi above class rating **

**d. Required only for welded flanges**

**3. “High strength” bolting is described as equivalent to:**

**a. ASTM A 193 B5 **

**b. ASTM A 193 B7 **

**c. ASTM 320 GR8 **

**d. Any high carbon steel bolt**

**4. The pressure class ratings covered by ASME B16.5 are:**

**a. 150, 300, 400, 600, 900, 1500, 2500 **

**b. 150, 300, 400, 450,600,900,1500 **

**c. 125, 150, 300, 400, 600, 900, 1500, 2500 **

**d. 150, 300, 400, 600, 700, 900, 1000, 1500**

**5. The standard finish for raised face flanges per ASME B16.5 is:**

**a. 250 µ to 500 µ / inch **

**b. 125 µ to 250 µ / inch **

**c. 260 mm to 500 mm / inch **

**d. 250 µ / mm to 500 µ / mm**

**6. Socket weld and threaded flanges are not recommended for service beyond the following temperatures if thermal cycles are involved:**

**a. –20 – 650°F **

**b. –30 – 600° F **

**c. –50 – 500°F **

**d. –50 – 500°C**

**7. “Low strength bolting” is:**

**a. ≤ 30 KSI yield strength **

**b. ≥ 30 KSI yield strength **

**c. ≥ 30 KSI tensile strength **

**d. ≥ 100 KSI yield strength**

**8. Ring joint sidewall surfaces (gasket groove) must not exceed __________roughness.**

**a. 50 µ / in **

**b. 63 µ / in **

**c. 100 µ/in **

**d. 63 mm / in**

**9. Which of the following items must be marked on all flanges or flanged fittings?**

**a. Temperature **

**b. Actual working pressure **

**c. ASTM material specification **

**d. Hydrotest pressure**

**10. When used above ________ °F, class 150 flanges may develop leakage unless special precautions are taken regarding loads or thermal gradients.**

**a. 150 **

**b. 300 **

**c. 600 **

**d. 400 **

**11. The three basic parts to a flanged joint are:**

**a. Flanges, welds, gaskets **

**b. Flanges, bolts, nuts **

**c. Flanges, bolts, gaskets**

**d. Flanges, gaskets, threads**

**12. Class 600 flanged joints may develop leakage, unless special considerations for thermal gradients are applied at temperatures above ________°F.**

**a. 600 **

**b. 800 **

**c. 950 **

**d. 750 **

**13. A Class 400 flanged fitting must be hydrotested at what pressure, if the 100°F rating is 800 psig?**

**a. 1020 psig **

**b. 1200 psig **

**c. 1225 psig **

**d. Not required per ASME B 16.5**

**14. The maximum temperature for hydro testing a fitting is:**

**a. 120F **

**b. 1250C **

**c. Per Construction Code requirements **

**d. Per Owner / User system requirements**

**15. The minimum duration for hydro testing on NPS 12 fitting shall be:**

**a. 2 min **

**b. 1 min **

**c. 3 min **

**d. No requirements to test fittings**

**16. The maximum depth and radial projection of an imperfection (deeper than the bottom of the serration) on a NPS 14 raised face flange is:**

**a. 0.31” **

**b. 0.018” **

**c. 0.18” **

**d. 0.25”**

**17. On an NPS 24, 600 Class flange, the thickness of the flange (minimum) is:**

**a. 4 ½” **

**b. 3.00” **

**c. 6.0” **

**d. 4.0” **

**18. The allowable pressure (in psig) on a 100°F, Class 150 8” flange made from A182 Grade F2 material is:**

**a. 170 **

**b. 290 **

**c. 300 **

**d. 400**

**19. If a Class 1500 flange is to be made from A-182 F347 stainless steel and will be used at 280 psig with a carbon content of 0.09%, at what maximum temperature can this flange be used?**

**a. 1000°F **

**b. 1300°F **

**c. 1180°F **

**d. 2000°F**

**20. What is the minimum wall thickness of a Class 900 fitting that is NPS 16?**

**a. 1.56” **

**b. 2.6” **

**c. 3.2” **

**d. 4.1”**

**21. What is the rated working pressure of a flanged fitting that is a 400 Class with a material stress value of 16,200 psi?**

**a. 1000 psig **

**b. 1500 psig **

**c. 800 psig **

**d. 740 psig**

**22. What is the minimum wall thickness of a NPS 5 Class 1500 fitting?**

**a. 0.091” **

**b. 0.91” **

**c. 1.00” **

**d. 1.15”**

**23. What is the maximum system hydrostatic test pressure required for a Class 300 flange that is made from Group 1.10 material?**

**a. 1125 psig **

**b. 450 psig **

**c. 1000 psig **

**d. None of the above**

**24. A local area has been thinned on the wall thickness of a flanged fitting. The fitting is NPS 8 Class 400, and the local area has been thinned to 0.400”. Is this corrosion acceptable per ASME B 16.5?**

**a. Yes **

**b. No **

**c. Cannot be calculated from information given **

**d. Wall thicknesses may not be less than that shown in B16.5**

**25. In question No.9, what is the maximum circular area of sub-minimum thickness allowed, in square inches?**

**a. 2.75 **

**b. 0.74 **

**c. 1.85 **

**d. 0.431 **

**26. From problem No.9 and No.10 above, if two areas of sub-minimum thickness are observed on the fitting, what is the minimum distance between the edges of these circles?**

**a. 3.0” **

**b. 2.70” **

**c. 8.0” **

**d. 3.70” **

**27. What is the maximum system hydrostatic test pressure required for a Class 600 flange in a flanged joint made from Group 3.5 material?**

**a. 2250 psi **

**b. 1500 psi **

**c. 1000 psi **

**d. None of the above**

**28. A local area has been thinned on the wall of a flanged fitting. The fitting is NPS 12 Class 900, and the local area has been thinned to 0.945”. What is the minimum acceptable thickness for this thinned area per ASME B 16.5?**

**a. 0.9375” **

**b. 1.250” **

**c. 1.750” **

**d. Cannot be calculated from information given**

**29. From the information in Question No.13, what is the maximum circular area of subminimum thickness allowed in square inches?**

**a. 2.75” **

**b. 1.33” **

**c. 1.85” **

**d. 0.431”**

**30. Using the information in questions No.13, 14 , if two areas of sub-minimum thickness are observed on the fitting, what is the minimum distance between the edges of these circles?**

**a. 3.0” **

**b. 2.70” **

**c. 6.52” **

**d. 4.70”**

**31. What would be the calculated thickness of a new NPS 14 flanged fitting with a 900 psi class designation?**

**a. 0.830” **

**b. 1.28” .**

**c. 1.112” **

**d. None of the above**

**32. A NPS flanged fitting is operating at a temperature of 6500F and has a pressure class rating of 600 psi. Using a stress value of 17,400 psi, what would be the maximum permitted rated working pressure?**

**a. 2000 psi **

**b. 1193 psi **

**c. 1175 psi **

**d. 1500 psi**