CWI Part A 실전 모의고사: 안전 및 열처리 > CWI 온라인교육

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      CWI Part A (Fundamentals) Mock Exam - Set #2

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[Notice] This is the second set of practice questions for 

the CWI Part A exam. It focuses on Safety, Heat Control, 

and more advanced NDT/Symbol concepts.

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Section 1. Safety & Health

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Q1. What is the most important factor for protecting 

    personnel from welding fumes and gases?

    A. Wearing a leather apron

    B. Proper ventilation in the welding area

    C. Using a darker filter lens (Shade 14)

    D. Keeping the electrode dry

Q2. Which type of radiation produced during arc welding 

    can cause "arc eye" (retinal or corneal burns)?

    A. Infrared radiation

    B. Microwave radiation

    C. Ultraviolet (UV) radiation

    D. X-ray radiation

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Section 2. Welding Metallurgy & Heat Control

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Q3. What is the effect of an extremely fast cooling rate 

    on the Heat Affected Zone (HAZ) of high-carbon steel?

    A. Increased ductility and toughness

    |B. Formation of a hard and brittle Martensite structure

    C. Reduction in residual stresses

    D. Increased resistance to hydrogen cracking

Q4. Which of the following is NOT a common method for 

    measuring preheat temperature?

    A. Temperature-indicating crayons (Tempilstik)

    B. Digital infrared thermometers

    C. Contact pyrometers

    D. A standard pressure gauge

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Section 3. Non-Destructive Testing (NDT)

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Q5. In Radiographic Testing (RT), what is the purpose of 

    an IQI (Image Quality Indicator / Penetrameter)?

    A. To measure the exact depth of a defect

    B. To determine the sensitivity and quality of the radiograph

    C. To increase the speed of the exposure

    D. To filter out low-energy radiation

Q6. Which NDT method utilizes "Capillary Action" as its 

    primary operating principle?

    A. Magnetic Particle Testing (MT)

    B. Ultrasonic Testing (UT)

    C. Liquid Penetrant Testing (PT)

    D. Eddy Current Testing (ET)

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Section 4. Welding Symbols & Drawings

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Q7. In a welding symbol, a "Flag" located at the junction 

    of the arrow and reference line indicates:

    A. A weld that must be made in the shop

    B. A field weld (made at the construction site)

    C. A weld that goes all the way around a joint

    D. A requirement for 100% NDT inspection

Q8. Where is the "Tail" of a welding symbol used?

    A. To indicate the size of the weld

    B. To specify the welding process or other references

    C. To show the length of the weld

    D. To point to the specific joint to be welded

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Section 5. Destructive Testing & Properties

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Q9. A "Guided Bend Test" is primarily used to evaluate:

    A. The tensile strength of the weld metal

    B. The ductility and soundness of the welded joint

    C. The chemical composition of the filler metal

    D. The hardness of the Heat Affected Zone (HAZ)

Q10. The ability of a metal to absorb energy and deform 

     plastically before fracturing is known as:

     A. Hardness

     B. Toughness

     C. Strength

     D. Stiffness

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                      ANSWER KEY

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

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

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