NOCTI Welding Test –Actual Practice Questions
Complete Practice Exam with Correct Answers and
Detailed Explanations Latest Update This Year
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SECTION 1: SAFETY & PERSONAL PROTECTIVE EQUIPMENT (Questions 1-15)
Q1. What is the primary function of the lens in a welding helmet?
A) To magnify the weld pool for better visibility
B) To protect the welder's eyes from infrared and ultraviolet radiation
C) To provide a tint that reduces overall brightness
D) To allow the welder to see through smoke and fumes
Correct Answer: B. To protect the welder's eyes from infrared and ultraviolet
radiation
The lens's main purpose is to filter out harmful UV and IR radiation produced by
the arc, which can cause eye damage like arc flash. While it reduces brightness,
the primary function is radiation protection .
Q2. According to OSHA standards, what is the minimum recommended distance
for storing oxygen cylinders away from fuel gas cylinders?
,A) 5 feet
B) 10 feet
C) 20 feet
D) 30 feet
Correct Answer: C. 20 feet
OSHA requires a minimum separation of 20 feet between stored oxygen and fuel
gas cylinders, or a non-combustible barrier at least 5 feet high with a 30-minute
fire rating .
Q3. What is the most important safety equipment used in arc welding?
A) Clothing
B) Leather gloves
C) Welding helmet
D) Electrode holder
Correct Answer: C. Welding helmet
The welding helmet provides essential protection for the eyes and face against arc
radiation (UV/IR), sparks, and debris. Eye protection is the most critical safety
consideration in arc welding .
Q4. A Class A fire extinguisher can be safely used on which type of fire?
A) Wood
B) Grease
,C) Electrical
D) Flammable liquids
Correct Answer: A. Wood
A Class A fire extinguisher is appropriate for use only on regular combustible
materials such as wood, paper, cloth, etc. .
Q5. When welding in a confined space, the welder must have:
A) A fire extinguisher inside the space
B) A watchperson outside the space
C) Self-contained breathing apparatus
D) A ventilation fan only
Correct Answer: B. A watchperson outside the space
OSHA requires that a watchperson be outside the space and in constant contact
with the person in the confined space in order to ensure the person's safety and
call for emergency assistance if needed .
SECTION 2: WELDING SYMBOLS & BLUEPRINT READING (Questions 6-15)
Q6. On a welding symbol, the arrow line connects the reference line to the joint.
What does the side of the joint the arrow points to signify?
A) The side to which the weld symbol is applied
B) The side that requires preheat
, C) The side that will be back-gouged
D) The side that must be ground flush
Correct Answer: A. The side to which the weld symbol is applied
The arrow side of a welding symbol is the side of the joint that the arrow points to.
The weld symbol is placed below the reference line for the arrow side .
Q7. The reference line on a welding symbol is drawn:
A) Vertical
B) Horizontal
C) Either way
D) Diagonal
Correct Answer: B. Horizontal
The reference line on a welding symbol is drawn horizontally. All welding symbols
are built around this horizontal reference line .
Q8. Welding symbols are read from:
A) Left to Right
B) Right to Left
C) Either way
D) Top to Bottom
Correct Answer: A. Left to Right
Complete Practice Exam with Correct Answers and
Detailed Explanations Latest Update This Year
Instant Pdf Download
SECTION 1: SAFETY & PERSONAL PROTECTIVE EQUIPMENT (Questions 1-15)
Q1. What is the primary function of the lens in a welding helmet?
A) To magnify the weld pool for better visibility
B) To protect the welder's eyes from infrared and ultraviolet radiation
C) To provide a tint that reduces overall brightness
D) To allow the welder to see through smoke and fumes
Correct Answer: B. To protect the welder's eyes from infrared and ultraviolet
radiation
The lens's main purpose is to filter out harmful UV and IR radiation produced by
the arc, which can cause eye damage like arc flash. While it reduces brightness,
the primary function is radiation protection .
Q2. According to OSHA standards, what is the minimum recommended distance
for storing oxygen cylinders away from fuel gas cylinders?
,A) 5 feet
B) 10 feet
C) 20 feet
D) 30 feet
Correct Answer: C. 20 feet
OSHA requires a minimum separation of 20 feet between stored oxygen and fuel
gas cylinders, or a non-combustible barrier at least 5 feet high with a 30-minute
fire rating .
Q3. What is the most important safety equipment used in arc welding?
A) Clothing
B) Leather gloves
C) Welding helmet
D) Electrode holder
Correct Answer: C. Welding helmet
The welding helmet provides essential protection for the eyes and face against arc
radiation (UV/IR), sparks, and debris. Eye protection is the most critical safety
consideration in arc welding .
Q4. A Class A fire extinguisher can be safely used on which type of fire?
A) Wood
B) Grease
,C) Electrical
D) Flammable liquids
Correct Answer: A. Wood
A Class A fire extinguisher is appropriate for use only on regular combustible
materials such as wood, paper, cloth, etc. .
Q5. When welding in a confined space, the welder must have:
A) A fire extinguisher inside the space
B) A watchperson outside the space
C) Self-contained breathing apparatus
D) A ventilation fan only
Correct Answer: B. A watchperson outside the space
OSHA requires that a watchperson be outside the space and in constant contact
with the person in the confined space in order to ensure the person's safety and
call for emergency assistance if needed .
SECTION 2: WELDING SYMBOLS & BLUEPRINT READING (Questions 6-15)
Q6. On a welding symbol, the arrow line connects the reference line to the joint.
What does the side of the joint the arrow points to signify?
A) The side to which the weld symbol is applied
B) The side that requires preheat
, C) The side that will be back-gouged
D) The side that must be ground flush
Correct Answer: A. The side to which the weld symbol is applied
The arrow side of a welding symbol is the side of the joint that the arrow points to.
The weld symbol is placed below the reference line for the arrow side .
Q7. The reference line on a welding symbol is drawn:
A) Vertical
B) Horizontal
C) Either way
D) Diagonal
Correct Answer: B. Horizontal
The reference line on a welding symbol is drawn horizontally. All welding symbols
are built around this horizontal reference line .
Q8. Welding symbols are read from:
A) Left to Right
B) Right to Left
C) Either way
D) Top to Bottom
Correct Answer: A. Left to Right
