Preparatory Questions (Set – 3)

1. Overlap in welds could be influenced by:

    1. Welding process
    2. Welding position
    3. Poor welding technique
    4. All the above

2. In MAG/CO2 welding which parameter gives the greatest control of weld appearance during dip transfer or short-circuiting welding?

    1. Wire stick-out length
    2. Welder’s convenience
    3. Wire feed speed
    4. Inductance

3. In X-ray work the quality of the radiographic image is assessed by the:

    1. Density of the film
    2. IQI indicator
    3. KVA available
    4. Stand-off distance

4. In Shielded Metal arc welding what parameter is used for control of penetration into the base material?

    1. Voltage
    2. Welding speed
    3. Gravitational pull of the earth
    4. Current

5. Welds made with a damaged electrode coatings in Shielded metal arc welding will lead to:

    1. Porosity
    2. Undercut
    3. Excessive penetration
    4. Excessive bead height

6. What is the most common cause of failure in root bend tests?

    1. Improper mandrel setting
    2. Improper electrode holder
    3. Lack of fusion and penetration
    4. Too high a travel speed

7. When a steel is heated to above its upper critical temperature, the structure produced is:

    1. Martensite
    2. Austenite
    3. Pearlite
    4. Ferrite

8. Which of the following can arise from copper inclusions in a mild steel weld?

    1. Weld metal cracks
    2. HAZ cracks
    3. Lack of fusion
    4. Porosity

9. An electro slag weld requires what heat treatment to improve the grain structure?

    1. Annealing
    2. Stress relieving
    3. Normalising
    4. Quench and tempering

10.   An austenitic stainless steel may suffer:

    1. Weld decay
    2. Sensitisation
    3. Solidification cracking
    4. All the above

11.   Ultrasonics would be preferred over radiography due to:

    1. Ability to find most defects
    2. Lower skill requirement
    3. Ability to detect laminations
    4. Both a and c

12.   Generally the most suitable method of detecting lack of sidewall fusion would be:

    1. Ultrasonic Test
    2. MPI
    3. Radiography
    4. Penetrant inspection

13.   Repair welding is often more difficult than production welding due to:

    1. The material being ingrained with in-service contaminants
    2. Restricted access within the repair area
    3. The possible position of the weld repair
    4. All the above

14.   Flame cut preparations may, during welding, increase the likelihood of:

    1. Cracking
    2. Misalignment problems
    3. Inclusions
    4. All the above

15.   A welding procedure is useful to:

    1. Give information to the welder
    2. Give information to the inspector
    3. Produce sound welds
    4. All the above

16.   From the following electrode coding E50 4 B 160 20 H5, the compulsory part is:

    1. E50 4 B 160 20 H5
    2. B 160 20 H5
    3. E50 4 B
    4. None of the above

17.   When TIG welding Austenitic Stainless Steel pipe, Argon gas baking is called for. This is to:

    1. Prevent oxidation
    2. Prevent under bead cracking
    3. Prevent porosity
    4. Control the penetration bead shape

18.   A welder qualification test is to verify:

    1. Skill of the welder
    2. The quality of the materials
    3. The non-destructive test procedures
    4. The manufacturing method

19.   The unit of Joules would be used to measure:

    1. Tensile strength
    2. Impact energy
    3. Hardness
    4. Electrical resistance

20.   Submerged arc welding is a process that generally gives:

    1. Slag free welds
    2. Low penetration
    3. Low dilution
    4. High heat input

21.    When measuring the welding parameters with the MMA welding (SMAW) process for the purpose of approval of welding procedure, the Welding inspector should measure the voltage:

    1. As close to the welding arc as possible
    2. Anywhere along the welding cable
    3. Always from the voltmeter on the welding plant
    4. As near to the welding terminals as possible

22.   In arc welding process, which of the following is the correct term used for the amount of weld metal deposited per minute?

    1. Filling rate
    2. Deposition rate
    3. Weld deposition
    4. All of the above

23.    Which electrode is most suitable for welding of low alloy steels with MMA welding process:

    1. Basic hydrogen controlled electrodes
    2. Rutile electrodes
    3. Cellulosic Electrodes
    4. Iron powder electrodes

24.    Initiation of a TIG arc by using a High Frequency (HF) spark may not be allowed for some application because

    1. It can damage electronic equipment
    2. It causes tungsten inclusion
    3. It is an electrical safety hazard
    4. All of the above

25.    Which of the following is likely to give the highest impact strength in ferritic weld metal?

    1. Basic coated normal metal arc electrodes
    2. Cellulosic electrodes
    3. Both A and B
    4. Neither A nor B

26.    Which type of power source characteristics is normally used for manual welding?

    1. Constant welding
    2. Flat characteristics
    3. Constant current
    4. A motor generator

27.    You suspected that ferritic steel plates, which have been edge, prepared contain crack in the prepared edges. Which NDT method would you use to check this?

    1. Radiography
    2. Magnetic particle
    3. Penetrants
    4. Ultrasonic flaw detector

28.    When hydrogen control is specified for a manual metal arc-welding project the electrode would normally be:

    1. Cellulosic
    2. Iron oxide
    3. Acid
    4. Basic

29.    The steel composition in structural contract is changed form 0.15% carbon, 0.6% manganese, to 0.2% carbon, 1.2% manganese. Might this influence the incidence of?

    1. Cracking in the weld area
    2. Porosity
    3. Under cut for fillet welds
    4. All of the above

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

    1. Diesel engine driven motor generator
    2. Single operator transformer
    3. Multi operator transformers
    4. All of the above

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