Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
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1. A welder performing a root pass on a carbon steel pipe in the 6G
position notices intermittent lack of penetration at the bottom
quadrant of the joint despite maintaining a consistent amperage
setting. Which of the following is the most likely cause of this defect
during Shielded Metal Arc Welding (SMAW) using an E6010 electrode?
A. Excessively wide root opening combined with high travel speed
B. Improper electrode angle causing insufficient keyhole control
C. Excessively low preheat temperature on low-carbon steel
D. Use of direct current electrode positive instead of alternating current
B. Improper electrode angle causing insufficient keyhole control
,Improper manipulation and failure to maintain proper keyhole control in
the lower quadrant of a 6G pipe weld commonly causes incomplete
penetration. Electrode angle directly affects puddle support, root fusion,
and penetration consistency during vertical and overhead progression.
2. During qualification testing for a Florida pipe welding certification, a
welder is required to follow AWS D1.1 and ASME Section IX
requirements. Which document primarily governs welder qualification
variables for pressure piping applications?
A. AWS A5.1
B. API 1104
C. ASME Section IX
D. ASTM A53
C. ASME Section IX
ASME Section IX establishes qualification requirements for welding
procedures, welders, and welding operators used in pressure-retaining
components and piping systems. It defines essential variables, testing
methods, and qualification continuity requirements.
3. While Gas Tungsten Arc Welding (GTAW) stainless steel pipe, a welder
notices discoloration and sugaring on the backside of the root weld.
Which corrective action should be taken first?
,A. Increase tungsten diameter
B. Increase travel speed dramatically
C. Improve inert gas purging inside the pipe
D. Reduce filler metal diameter
C. Improve inert gas purging inside the pipe
Sugaring occurs when stainless steel is exposed to oxygen at elevated
temperatures during welding. Proper argon purging prevents oxidation on
the backside of the weld and preserves corrosion resistance and weld
integrity.
4. Which welding position is considered the most difficult and
comprehensive qualification position for pipe welding because it
combines flat, horizontal, vertical, and overhead welding?
A. 1G
B. 2G
C. 5G
D. 6G
D. 6G
The 6G position places the pipe at a fixed 45-degree angle, requiring the
welder to perform welds in all positions during a single test. This
qualification demonstrates a high level of welding skill and versatility.
, 5. A welder preparing a pipe joint for SMAW root pass welding measures
the root face and discovers it exceeds the welding procedure
specification tolerance. What is the most likely consequence of an
excessively thick land?
A. Increased risk of excessive reinforcement
B. Increased likelihood of burn-through
C. Difficulty achieving complete root penetration
D. Excessive shielding gas contamination
C. Difficulty achieving complete root penetration
An excessively thick root face restricts heat penetration into the joint root,
making it difficult to establish proper fusion and penetration. This often
leads to incomplete penetration or lack of fusion defects.
6. Which discontinuity is characterized by slag trapped between weld
passes and commonly results from insufficient cleaning or improper
electrode manipulation?
A. Porosity
B. Slag inclusion
C. Lamellar tearing
D. Undercut
B. Slag inclusion