CSWIP 3.1 Paper One Questions And Answers

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Here you can take a free CSWIP 3.1 practice test with the latest Paper One Questions and Answers (Multiple Choice).

1.

The predominant structure of hyper-eutectoid steel that has been quenched at above its upper critical point will be:

 
 
 
 

2.

Bend test specimens have been taken from a 25 mm thick carbon steel butt weld. Which would show lack of inter-run fusion?

 
 
 
 

3.

Proof stress is used when non-ferrous metals are undergoing tensile tests to determine the equivalent:

 
 
 
 

4.

When open site working, serious porosity in metal arc welds is brought to your attention. What would you investigate?

 
 
 
 

5.

The main reason for pre-heating medium and high carbon steels before cutting by oxy-fuel gas technique is to:

 
 
 
 

6.

One of the following alloys is non-magnetic – which?

 
 
 
 

7.

To test a component for vibrational loading, a suitable mechanical test would be:

 
 
 
 

8.

Pre-heating a carbon steel manual metal arc welding is carried out to minimise the risk of:

 
 
 
 

9.

When weld metal refinement takes place in a multi-run deposit, it is known by the term:

 
 
 
 

10.

During CO2 welding, the arc length is most likely to be affected by:

 
 
 
 

11.

The steel composition in a structural contract is changed from 0.15% carbon and 0.6% manganese to 0.2% carbon and 1.2% manganese. This might influence the incidence of:

 
 
 
 

12.

Preheating for arc welding applies to:

 
 
 
 

13.

One advantage of metal gas arc shielded welding is:

 
 
 
 

14.

You see a welder using an oxy-acetylene flame with a long feathered inner cone. What would be the effect of this on carbon steel?

 
 
 
 

15.

If submerged arc welding is used to make butt welds, which would you be most critical of?

 
 
 
 

16.

When manual metal arc welding is being carried out on an open construction site, which group of welders are most likely to require continuous monitoring?

 
 
 
 

17.

A fabricating procedure calls for fillet welds to be ‘blended in’ by grinding. This influences:

 
 
 
 

18.

One purpose of a microscopic examination of a weld is to establish the:

 
 
 
 

19.

Lamellar tearing has occurred in steel fabrication. BEFORE welding could it have been found by:

 
 
 
 

20.

You would certainly recognize a hydrogen controlled flux covered electrode from its:

 
 
 
 

21.

You are to oversee the arc welding of some machine fittings and find that they are cadmium plated. Would you:

 
 
 
 

22.

When TIG welding austenitic stainless steel pipe, argon gas backing is called for. This is to:

 
 
 
 

23.

One of the reasons for excluding hydrogen from the weld metal is to prevent the weld from:

 
 
 
 

24.

In UK practice, BS499 specifies that the drawing dimension quoted for a fillet weld is the:

 
 
 
 

25.

When a metal regains its original shape when a stress acting upon it is removed, the metal is said to have:

 
 
 
 

26.

You notice manual metal arc electrodes, stripped of flux, are being used as filler wire forTIG welding. You would object because:

 
 
 
 

27.

Which one of the following statements is correct?

 
 
 
 

28.

When ‘hydrogen control’ is specified for a manual metal arc welding project the electrode would normally be:

 
 
 
 

29.

A welder qualification test is to verify:

 
 
 
 

30.

For open-site manual metal welding the following equipment is available. Which would you choose for a safe site working?

 
 
 
 

Question 1 of 30

CSWIP 3.1 Paper One – Top 30 Questions and Answers (Free Practice Test)

Prepare for the CSWIP 3.1 Paper One Exam with our top 30 most important questions and answers. Free mock test with explanations, exam tips, and downloadable study material.

Are you preparing for the CSWIP 3.1 Welding Inspector Exam?

Then you’re in the right place. This free practice test will help you confidently prepare for CSWIP 3.1 Paper One (Theory Paper) with 30 hand-picked multiple-choice questions, detailed answers, and explanations based on the latest CSWIP syllabus.

At UpWeld.org, we’ve compiled the most frequently asked CSWIP Paper 1 questions from previous exams and training institutes — so you can focus on what truly matters.

About CSWIP 3.1 Paper One

Paper One of the CSWIP 3.1 (Welding Inspector Level) exam tests your understanding of welding theory, materials, inspection techniques, and defect identification.

Exam Details Description
Exam Name CSWIP 3.1 – Paper One (Theory)
Format Multiple Choice Questions (MCQs)
Total Questions 20–25
Passing Marks 70%
Duration 1 Hour
Topics Covered Welding processes, defects, NDT, materials, symbols, inspection procedures

How to Use This Free Practice Test

  1. Read each question carefully before viewing the answer.
  2. Try to recall the answer before checking.
  3. Review the explanations — they are designed to reinforce theory.
  4. At the end, check your score and identify weak areas.

Tip: Practice this set multiple times before attempting Paper Two (Application of Standards) and Paper Three (Visual Inspection).

Top 30 CSWIP 3.1 Paper One Questions and Answers

Section 1: Welding Processes & Equipment

Q1. Which welding process uses a continuously fed wire and shielding gas?
a) MMAW
b) FCAW
c) GMAW
d) SAW
Answer: c) GMAW
Explanation: Gas Metal Arc Welding (GMAW) uses a continuous wire electrode and an externally supplied shielding gas such as argon or CO₂.

Q2. The main advantage of TIG welding is:
a) High deposition rate
b) Low cost
c) Produces high-quality, precise welds
d) Can be used underwater
Answer: c) Produces high-quality, precise welds
Explanation: TIG (GTAW) produces clean and precise welds with excellent control, ideal for stainless steel and thin materials.

Q3. Submerged Arc Welding (SAW) mainly uses:
a) Flux-coated electrode
b) Bare wire with granular flux blanket
c) Consumable tungsten electrode
d) Gas shield only
Answer: b) Bare wire with granular flux blanket
Explanation: SAW employs a bare wire electrode and a layer of granular flux to shield the arc.

Section 2: Welding Defects & Discontinuities

Q4. Which of the following is a planar defect?
a) Porosity
b) Slag inclusion
c) Lack of fusion
d) Tungsten inclusion
Answer: c) Lack of fusion
Explanation: Planar defects, like a lack of fusion or cracks, are severe because they interrupt metal continuity.

Q5. What is the most likely cause of an undercut?
a) High welding speed
b) Low arc voltage
c) Insufficient shielding gas
d) Incorrect filler metal
Answer: a) High welding speed
Explanation: High speed causes the molten metal to fail to fill edges, resulting in an undercut.

Q6. Hydrogen-induced cracking is more likely in:
a) Austenitic stainless steel
b) Aluminum
c) Carbon steels with high hardness
d) Copper
Answer: c) Carbon steels with high hardness
Explanation: HIC occurs due to hydrogen entrapment, high hardness, and residual stress.

Section 3: Metallurgy & Heat Treatment

Q7. The microstructure of steel just below the lower critical temperature (Ac1) is:
a) Austenite
b) Pearlite
c) Martensite
d) Bainite
Answer: b) Pearlite
Explanation: Below Ac1, steel consists of pearlite (ferrite + cementite).

Q8. Normalizing of carbon steel is performed to:
a) Refine grain structure
b) Reduce hardness
c) Increase residual stress
d) Produce martensite
Answer: a) Refine grain structure
Explanation: Normalizing refines grain size and improves mechanical properties.

Q9. Tempering after quenching:
a) Softens the metal and increases ductility
b) Increases hardness
c) Produces martensite
d) Eliminates all residual stress
Answer: a) Softens the metal and increases ductility
Explanation: Tempering converts brittle martensite to a more stable structure.

Section 4: Non-Destructive Testing (NDT)

Q10. Which NDT method is best for detecting surface cracks in welds?
a) Radiography
b) Ultrasonic testing
c) Magnetic particle testing
d) Eddy current testing
Answer: c) Magnetic particle testing
Explanation: MT is ideal for surface and near-surface cracks in ferromagnetic materials.

Q11. Ultrasonic testing uses which type of energy?
a) X-rays
b) Sound waves
c) Magnetic flux
d) Light waves
Answer: b) Sound waves
Explanation: UT uses high-frequency sound waves to detect internal defects.

Q12. In radiographic testing, IQI stands for:
a) Image Quality Indicator
b) Internal Quality Inspection
c) Indication Quality Index
d) Inspection Quality Information
Answer: a) Image Quality Indicator
Explanation: IQI ensures the radiograph quality is suitable for defect detection.

Section 5: Welding Symbols & Drawings

Q13. The symbol “∠” in a welding drawing represents:
a) Fillet weld
b) V-groove weld
c) Bevel groove weld
d) Square groove weld
Answer: a) Fillet weld
Explanation: The triangular symbol represents a fillet weld.

Q14. In welding symbols, the arrow side is:
a) Always the top side
b) Side to which the arrow points
c) Opposite side of the weld
d) Not important
Answer: b) Side to which the arrow points
Explanation: The arrow side identifies where the weld is applied.

Q15. The tail of a welding symbol may contain:
a) Process designation (e.g., MIG, TIG)
b) Material thickness
c) Weld position
d) Inspection result
Answer: a) Process designation
Explanation: The tail is used to provide supplementary information, like the process type.

Section 6: Inspection & Quality Control

Q16. Visual inspection should be performed:
a) Only after welding
b) Only before welding
c) Before, during, and after welding
d) Only after NDT
Answer: c) Before, during, and after welding
Explanation: Visual inspection is a continuous process for ensuring weld quality.

Q17. Preheat is mainly applied to:
a) Reduce the cooling rate and prevent cracking
b) Increase deposition rate
c) Make the weld brighter
d) Eliminate inclusions
Answer: a) Reduce cooling rate and prevent cracking
Explanation: Preheating slows cooling, allowing hydrogen to escape and reducing cracking risk.

Q18. What is the most important factor affecting the hardness of weld metal?
a) Cooling rate
b) Current type
c) Electrode coating color
d) Base metal color
Answer: a) Cooling rate
Explanation: Faster cooling increases hardness and brittleness in carbon steels.

(Continue with questions up to Q30 — similar pattern covering welding codes, discontinuities, and safety. Take our Free Practice test)

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Frequently Asked Questions (FAQ)

Q1. How many papers are there in the CSWIP 3.1 exam?
There are three papers:

  • Paper 1: Welding Theory
  • Paper 2: Application of Standards
  • Paper 3: Visual Inspection Practical

Q2. What is the passing score for CSWIP 3.1 Paper One?
You must score at least 70% to pass this paper.

Q3. What topics should I focus on for Paper One?

  • Welding processes and defects
  • NDT methods (UT, RT, MT, PT)
  • Metallurgy and heat treatment
  • Welding symbols and standards

Q4. Where can I practice Paper Two and Paper Three?

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Final Tip

“Don’t just memorize — understand why each answer is correct.

The CSWIP 3.1 exam tests your reasoning, not just recall.”

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