CCI Steel Construction & Welding Inspection 2 — Questions and Answers
Question 1: An inspector observes an underfilled groove weld where the weld metal surface is below the surrounding base metal surface. This condition is called:
- Undercut
- Underfill (Correct answer)
- Overlap
- Porosity
Correct answer: Underfill
Underfill is a weld discontinuity where the weld metal does not fill the groove flush with the base metal surface, reducing the effective throat of the weld.
Question 2: What is the maximum permissible undercut depth for statically loaded non-tubular connections per AWS D1.1?
- 1/64 inch (0.4 mm)
- 1/32 inch (0.8 mm)
- 1/16 inch (1.6 mm) (Correct answer)
- 3/32 inch (2.4 mm)
Correct answer: 1/16 inch (1.6 mm)
AWS D1.1 permits undercut up to 1/16 inch (1.6 mm) for statically loaded non-tubular connections in most cases, provided it does not exceed 1/8 inch in length.
Question 3: Which non-destructive testing method uses high-frequency sound waves to detect internal weld discontinuities?
- Magnetic particle testing (MT)
- Liquid penetrant testing (PT)
- Ultrasonic testing (UT) (Correct answer)
- Radiographic testing (RT)
Correct answer: Ultrasonic testing (UT)
Ultrasonic testing (UT) uses high-frequency sound waves that are reflected by internal discontinuities, making it effective for detecting subsurface flaws in welds and base metal.
Question 4: For a pretensioned high-strength bolt connection, the turn-of-nut method requires bolts to be rotated beyond the snug-tight condition by how much for bolts with L/D ≤ 4 and both faces perpendicular to the bolt axis?
- 1/4 turn
- 1/3 turn
- 1/2 turn (Correct answer)
- 2/3 turn
Correct answer: 1/2 turn
The RCSC Specification requires 1/2 turn (180°) beyond snug-tight for bolt grip lengths up to and including 4 diameters when both connected parts have perpendicular faces.
Question 5: ASTM A325 and A490 high-strength bolts have been superseded by which ASTM standard?
- ASTM F436
- ASTM F1554
- ASTM F3125 (Correct answer)
- ASTM A563
Correct answer: ASTM F3125
ASTM F3125 is the consolidated standard that incorporates former ASTM A325, A490, F1852, and F2280 high-strength bolt specifications under grades A325, A490, F1852, and F2280.
Question 6: During steel erection inspection, an inspector notes that a column base plate has a gap on one side. Which document governs the tolerances for base plate bearing?
- AISC Code of Standard Practice (Correct answer)
- ACI 318
- AWS D1.1
- OSHA 1926 Subpart R
Correct answer: AISC Code of Standard Practice
The AISC Code of Standard Practice sets the standards for fabrication and erection tolerances for structural steel, including column base plate bearing requirements.
Question 7: What type of weld is specified when the design intent is to transfer shear parallel to the longitudinal axis of the weld, such as connecting a beam flange to a web?
- Groove weld
- Fillet weld (Correct answer)
- Plug weld
- Slot weld
Correct answer: Fillet weld
Fillet welds are triangular cross-section welds commonly used to join two members at an angle, effectively transferring shear loads parallel to their longitudinal axis.
CCI Steel Construction & Welding Inspection 2
An inspector observes an underfilled groove weld where the weld metal surface is below the surrounding base metal surface.
This condition is called: