API 510 Chapter 9

API 510 Chapter 9 ASME VIII Pressure Design

Take a Free API 510 Exam Chapter 9 Practice test with Latest ASME VIII Pressure Design Question and Answers

1.

Q1. ASME VIII UG-27: shells under internal pressure
The stress trying to split a vessel shell longitudinal weld open is called?

 
 
 
 

2.

Q2. ASME VIII UG-27: shells under internal pressure
The stress formulae of UG-27 relevant to cylinders are used for?

 
 
 
 

3.

Q3. ASME VIII UG-27: shells under internal pressure
The main cylinder dimension used in the UG-27 cylinder formulae is?

 
 
 
 

4.

Q4. ASME VIII UG-27: shells under internal pressure
The parameter E used in the UG-27 cylinder formulae is?

 
 
 
 

5.

Q5. ASME VIII UG-27: shells under internal pressure
A vessel with a longitudinally seamed shell circumferentially welded to hemispherical heads is pressurized internally until it fails. Which of these formulae would you use to calculate the pressure at which the split would occur?

 
 
 
 

6.

Q6. ASME VIII UG-27: shells under internal pressure
Which of these vessels could you not use the UG-27 formulae for (using a given joint efficiency of E =1) if the material has allowable stress at its design temperature of 20 ksi?

 
 
 
 

7.

Q7. ASME VIII UG-27: shells under internal pressure
A vessel has the following given parameters
OD = 36 in
Wall thickness = 1 in
Joint efficiency E = 1
Allowable stress at design temperature = 20 ksi
What is the maximum allowable working pressure (MAWP) at its design temperature?

 
 
 
 

8.

Q8. ASME VIII UG-32 and UG-16 (b): heads under internal pressure
What is the absolute minimum allowable thickness of a vessel head of any design, irrespective of service fluid and material, if it is to have a corrosion allowance of 2 mm?

 
 
 
 

9.

Q9. ASME VIII UG-32: heads under internal pressure
Which of these head designs has a knuckle radius and crown radius?

 
 
 
 

10.

Q10. ASME VIII UG-32 (d): ellipsoidal head design
What is the minimum required thickness (t corroded) of a 2:1
ellipsoidal head of t/L > 0.002 with the following dimensions:
D = inside diameter of 40 inches
P = pressure of 300 psi
E = 0.85 (double-sided butt weld with spot examination
(UW-12))
S = 15 800 psi

 
 
 
 

11.

9.8 Set 2: MAWP and pressure testing familiarization questions
Q1. ASME VIII UG-98: MAWP location
At what location is MAWP specified?

 
 
 
 

12.

Q2. ASME VIII UG-99: standard hydrostatic test
What is the current multiplier of hydrostatic test pressure compared to MAWP, excluding any temperature correction?

 
 
 
 

13.

Q3. ASME VIII UG-99: standard hydrostatic test
A vessel with a MAWP of 1000 psi at a design temperature of 700 °F is hydrostatically tested at 1300 psi at ambient temperature. What is wrong with this?

 
 
 
 

14.

Q4. ASME VIII UG-99: standard hydrostatic test
A vessel has a design pressure of 125 psi and a design temperature of 600 °F. The material allowable stresses (S) are shown in ASME II as follows:
. S at ambient temperature =18.8 ksi
. S at 600 °F = 11.4 ksi
What is the correct hydrostatic test pressure at ambient temperature?

 
 
 
 

15.

Q5. ASME VIII UG-99 (g): standard hydrostatic test
A vessel has a design pressure of 200 psi and a design temperature of 400 °F. The material allowable stresses (S) are shown in ASME II as follows:
. S at ambient temperature = 20 ksi
. S at 400 °F = 18 ksi
If it is hydrostatically tested at ambient temperature, at what pressure should an inspection be made of the weld joints and seams?

 
 
 
 

16.

Q6. ASME VIII UG-100 and UG-20: pneumatic test
Which of these statements is false?

 
 
 
 

17.

Q7. ASME VIII UG-100 (c): pneumatic test
A vessel is to be pneumatically tested to 100 psi with air. The vessel is manufactured from a material that has a minimum design metal temperature of 10 °F. What is the minimum temperature at which the vessel can be safely tested?

 
 
 
 

18.

Q8. ASME VIII UG-100 (d): pneumatic test
What are the increments used to increase the pressure up to pneumatic test pressure?

 
 
 
 

19.

Q9. ASME VIII UG-100 (d): pneumatic test
A vessel has a design pressure of 200 psi and a design temperature of 400 °F. The material allowable stresses (S) are shown in ASME II as follows:
. S at ambient temperature = 20 ksi
. S at 400 °F = 18 ksi
If it is pneumatically tested at ambient temperature, and as it is air and has no hydrostatic head effects, at what pressure should a leakage inspection be made of the weld joints and seams?

 
 
 
 

20.

Q10. ASME VIII UG-102: test gauges
A vessel is to be pressure tested to 150 psi. Which of the following ranges should be used for the test gauge?

 
 
 
 

21.

9.10 Set 3: Vessels Under External Pressure Familiarization Questions
Q1. ASME VIII UG-28: shells under external pressure
What is the relationship between the maximum internal pressure (P) a vessel can resist and the maximum external pressure (Pa) it can resist?

 
 
 
 

22.

Q2. ASME VIII UG-28 (b): lines of support
Where is the ‘line of support’ assumed to be in a vessel head with head depth h (where h excludes the straight flange part)?

 
 
 
 

23.

Q3. ASME VIII UG-28(c): formula limits
Which formula should you use to determine the maximum allowable external pressure (Pa) for a cylinder with a wall thickness of 20 % of its external diameter Do?

 
 
 
 

24.

Q4. ASME VIII UG-28(c): formula limits
Limited data for a vessel are given as:
Outside diameter Do = 60 in
Length between supports L = 15 feet
Factor A = 0.000 18
Factor B = 2500
These are all the data you have. How thick does the vessel wall
have to be suitable for use under a full vacuum?

 
 
 
 

25.

Q5. ASME VIII UG-28: A, B factors
In an exam question, from where are you likely to get the values for external pressure (Pa) factors A and B?

 
 
 
 

Question 1 of 25

Click Here To Read Next API 510 exam Chapter 10 – ASME VIII Welding and NDE Free Practice test

Now try these familiarization questions on shell and head calculations.

9.6 Set 1: shells/heads under internal pressure familiarization questions

Now try these familiarization questions on MAWP and pressure testing.

9.8 Set 2: MAWP and pressure testing familiarization questions

Now try these familiarization questions.

9.10 Set 3: vessels under external pressure familiarization questions

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