API 510 Pressure Testing Procedures

Question 1

What is the primary purpose of hydrostatic testing for pressure vessels?

Accepted Answer

To verify structural integrity under controlled pressure conditions

Answer

To measure vessel capacity

Answer

To clean the vessel interior

Answer

To calibrate pressure gauges

Question 2

What medium is typically used in hydrostatic pressure testing?

Accepted Answer

Water

Answer

Air

Answer

Nitrogen

Answer

Steam

Question 3

At what multiple of design pressure is a hydrostatic test typically conducted?

Accepted Answer

1.3 to 1.5 times design pressure

Answer

0.5 times design pressure

Answer

1.0 times design pressure

Answer

3.0 times design pressure

Question 4

What must be done before conducting a pressure test on a vessel?

Accepted Answer

Verify all connections, inspect welds, and ensure safety measures are in place

Answer

Start testing immediately

Answer

Remove all safety devices

Answer

Heat the vessel to operating temperature

Question 5

When is pneumatic testing used instead of hydrostatic testing?

Accepted Answer

When the vessel cannot support the weight of water or water could damage internal components

Answer

Always preferred over hydrostatic

Answer

Only for new vessels

Answer

Never - it is prohibited

Question 6

What should be monitored during a pressure hold period?

Accepted Answer

Pressure gauge readings for any pressure drops indicating leaks

Answer

Nothing - just wait

Answer

Temperature only

Answer

Vessel color changes