API 653 Questions with CORRECT Answers

API 653 Questions with CORRECT Answers

Question:
A welder is qualified on a plate in the 3G position. The welder is qualified for what fillet
weld position(s)?
A. None
B. F, H
C. F, H, V
D. All fillets
Answer:
C. F, H, V


Question:
When must a shim be placed under an Image Quality Indicator?
A. When the area of interest is darker.
B. When the area of interest is darker by more than 15%.
C. When the area of interest is lighter
D. When the area of interest is lighter by more than 15%.
Answer:
D. When the area of interest is lighter by more than 15%.


Question:
A welder passes a qualification test using a 3 NPS pipe with a groove weld. What is the
maximum pipe diameter that the welder is now qualified to weld?
A. 2-7/8"
B. 4"
C. 8"
D. Unlimited
Answer:
D. Unlimited

, Question:
A portion of a 1/2" thick shell plate is replaced. What is the closest distance allowed
between this plate and the adjacent vertical weld?
A. 3"
B. 6"
C. 10"
D. 12"
Answer:
B. 6"


Question:
A 3/4" thick A-662-C plate is used for during a tank shell repair. For this material,
determine the tank's lowest operating temperature. (Impact testing of the material has
not been performed.)
A. -25 °F
B. -10 °F
C. +15 °F
D. +41 °F
Answer:
C. +15 °F


Question:
A flush patch (patch with butt welds) is installed in a shell plate that is 1" thick. What is
the closest distance allowed between this piece and the existing horizontal weld?
A. 3"
B. 6"
C. 8"
D. 10"
Answer:
D. 10"