ASNT Visual Testing - Level I & II Practice Questions — 10 Free (2026)

Answer them, then check the reasoning and the clause each one comes from. No account, no card, nothing to dismiss.

10 CLOSED BOOK4 STANDARDS

ASNT VT I-II at a glance

Question bank: 600 questions
Mock papers: 5 full-length
This sample: 10 closed book

The ten questions below draw on ISO 5817, AWS D1.1, ISO 3058 and ISO 6520.1.

Common questions

Do I need an account to try these?: No. The ten questions on this page are open to anyone — no registration, no card. An account is only needed for the full bank.
What does “the clause it comes from” mean?: Every answer names the publication and the paragraph the rule sits in, so you can find it in your own copy rather than taking our word for it. That is the habit the open-book part of these exams rewards.
How large is the full ASNT VT I-II bank?: 600 questions, including 5 full-length mock papers.
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10 QUESTIONS

CLOSED BOOKASNT VT I-II1 / 10

A lamp gives 800 lux at one metre. What does it give at two metres?

Worked answers

All ten ASNT Visual Testing - Level I & II questions with the correct option, why it is correct and the paragraph it comes from. Attempt them above first — the reasoning is worth more than the key.

Show the ten answers and their references

Q1 · ASNT VT I-II · Closed book
A lamp gives 800 lux at one metre. What does it give at two metres?
- A. 100 lux
- B. 200 lux ✓
- C. 400 lux
- D. 800 lux
- E. 1600 lux
Illuminance from a small source falls with the square of the distance. Doubling the distance spreads the light over four times the area, so 800 lux becomes 200 lux. ASNT Study Guide Visual and Optical Testing, lighting
Q2 · ISO 5817 · Closed book
A specification limits excess weld metal to 1 mm plus 0.1 times the weld width. What is permitted on a 20 mm wide weld?
- A. 1 mm
- B. 2 mm
- C. 3 mm ✓
- D. 4 mm
- E. 5 mm
1 mm plus 0.1 times 20 mm gives 3 mm. Limits of this form grow with the weld width, so the arithmetic has to be repeated for every weld. ISO 5817 quality levels for imperfections
Q3 · AWS D1.1 · Closed book
A contract requires 10 percent visual examination of 240 joints. How many are examined?
- A. 12 joints
- B. 24 joints ✓
- C. 36 joints
- D. 48 joints
- E. 60 joints
10 percent of 240 joints is 24 joints. The selection basis should be fixed before work starts, otherwise the sample says nothing about the rest. AWS D1.1 structural welding code steel
Q4 · ISO 3058 · Closed book
A simple magnifier has a focal length of 50 mm. What is its approximate power?
- A. 2 x
- B. 3 x
- C. 5 x ✓
- D. 8 x
- E. 10 x
The power of a simple magnifier is approximately the near point of the eye, 250 mm, divided by the focal length: 250 divided by 50 gives about 5 x. ISO 3058 aids to visual inspection
Q5 · ISO 5817 · Closed book
An undercut limit is 5 percent of a 12 mm wall. What depth is permitted?
- A. 0.3 mm
- B. 0.6 mm ✓
- C. 1.2 mm
- D. 1.8 mm
- E. 2.4 mm
5 percent of 12 mm is 0.6 mm. Limits expressed as a proportion of wall thickness change with every joint. ISO 5817 quality levels for imperfections
Q6 · ISO 3058 · Closed book
The eye resolves 0.09 mm unaided. What does a 4 x magnifier make resolvable?
- A. 0.011 mm
- B. 0.023 mm ✓
- C. 0.045 mm
- D. 0.090 mm
- E. 0.180 mm
A 4 x magnifier makes detail four times finer resolvable: 0.09 mm divided by 4 is about 0.023 mm, within the limits of the optics and the lighting. ISO 3058 aids to visual inspection
Q7 · AWS D1.1 · Closed book
A fillet weld has a 10 mm leg. What is the design throat for an equal leg fillet?
- A. 5 mm
- B. 6 mm
- C. 7 mm ✓
- D. 8 mm
- E. 10 mm
For an equal leg fillet the theoretical throat is the leg multiplied by cos 45 degrees, about 0.707, so a 10 mm leg gives about 7 mm. AWS D1.1 structural welding code steel
Q8 · ISO 6520.1 · Closed book
How does excess penetration present at the root of a joint?
- A. As a shallow depression running along the root of the welded joint
- B. As weld metal protruding beyond the root surface ✓
- C. As a groove
- D. As porosity
- E. As a crack
It matters most in pipework, where the protrusion restricts flow and can be caught by anything passing through the bore. ISO 6520-1 classification of geometric imperfections
Q9 · ISO 6520.1 · Closed book
How does undercut present itself at a weld toe?
- A. As a raised bead
- B. As a rounded cavity lying within the deposited weld metal itself
- C. As a groove in the parent metal alongside the weld ✓
- D. As a spatter bead lying beside the toe
- E. As a crack
It is metal that has been melted away and not replaced, which leaves a notch running along the edge of the weld. ISO 6520-1 classification of geometric imperfections
Q10 · ISO 6520.1 · Closed book
How does surface porosity present on a weld cap?
- A. As rounded holes open at the surface of the metal ✓
- B. As a groove
- C. As a step
- D. As a sharp linear feature running along the toe of the welded joint
- E. As spatter
Gas trapped as the metal froze leaves a rounded cavity, and the rounded shape is what separates it from a crack. ISO 6520-1 classification of geometric imperfections

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