QUESTION: 53

In design and fabrication, it is advisable to avoid sharp changes in cross section, such as short radius fillets or undercut that can give rise to _________. Long-seam welds are particularly susceptible to reheat cracking due to mismatch caused by fit up problems.

Stress concentrations
Cracking
Circumferential stress
All of the above

Answer(s): A

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QUESTION: 54

The most important factors affecting graphitization are the chemistry, stress, temperature and _______.

Velocity
Time at exposure
Pressure
Ductility

Answer(s): B

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QUESTION: 55

Creep damage is found in high temperature equipment operating above the ________. Fired heater tubes and components, Catalytic reactors, FCC reactors and FCC fractionator and regenerator internals all operate in or near this.

Transition range
MADT
Creep range
None of the above

Answer(s): C

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QUESTION: 56

Amine stress corrosion cracking is most often associated with lean amine services. The pure alkanolamine does not cause cracking. Cracking in rich amine services are most often associated with _______ problems.

H²S
Stress
Wet H²S
Temperature

Answer(s): C

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QUESTION: 56

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