CWI Part A(기초 이론) 실전 대비 모의고사 > CWI 온라인교육

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        CWI Part A (Fundamentals) Mock Examination

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[Notice] This mock exam is designed to help students test 

their knowledge of the CWI Part A Fundamentals. These 

questions are based on the WIT curriculum and official 

exam patterns.

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Section 1. Welding Processes

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Q1. Which of the following is a primary characteristic of 

    the Short Circuiting Transfer mode in GMAW?

    A. High heat input suitable for thick sections

    B. Low heat input, making it ideal for thin gauge materials

    C. Occurs only when using 100% Argon shielding gas

    D. Characterized by a complete absence of spatter

Q2. In the SMAW electrode classification 'E7018', what 

    does the third digit '1' represent?

    A. The type of flux coating

    B. All-position welding capability

    C. Low hydrogen content

    D. Minimum tensile strength of 70,000 psi

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Section 2. Inspection & Discontinuities

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Q3. Which NDT method is limited to detecting only those 

    discontinuities that are open to the surface?

    A. RT (Radiographic Testing)

    B. UT (Ultrasonic Testing)

    C. PT (Liquid Penetrant Testing)

    D. MT (Magnetic Particle Testing)

Q4. What is a common cause of 'Undercut' in a weldment?

    A. Excessive welding current

    B. Voltage setting that is too low

    C. Lack of proper preheat

    D. Moisture in the electrode coating

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Section 3. Symbols & Math

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Q5. In a welding symbol, where would the symbol for a weld 

    be placed to indicate the 'Arrow Side'?

    A. Above the reference line

    B. Below the reference line

    C. In the tail of the symbol

    D. At the break in the arrow

Q6. Convert 1/4 inch to millimeters (mm) based on standard 

    conversion factors used in CWI exams.

    A. 6.00 mm

    B. 6.35 mm

    C. 12.7 mm

    D. 2.54 mm

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Section 4. Metallurgy & Testing

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Q7. Which test is specifically used to determine the 

    'Impact Toughness' of a material?

    A. Tensile Test

    B. Guided Bend Test

    C. Charpy V-notch Test

    D. Rockwell Hardness Test

Q8. What is the primary reason for applying 'Preheat' when 

    welding carbon steels?

    A. To increase the depth of penetration

    B. To slow the cooling rate and prevent delayed cracking

    C. To make slag removal easier after welding

    D. To increase the travel speed of the welding arc

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Section 5. Engineering Mechanics

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Q9. What is the formula for calculating 'Engineering Stress'?

    A. Stress = Load / Original Cross-sectional Area

    B. Stress = Load / Instantaneous Cross-sectional Area

    C. Stress = Load * Area

    D. Stress = Area / Load

Q10. The property of a metal that allows it to return to 

     its original shape after removal of a load is:

     A. Elasticity

     B. Plasticity

     3. Ductility

     4. Brittleness

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                      ANSWER KEY

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Q1: B | Q2: B | Q3: C | Q4: A | Q5: B

Q6: B | Q7: C | Q8: B | Q9: A | Q10: A

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