Preparatory Questions (Set – 4)

1.     Which of the following does not require baking;

    1. E 6010
    2. E 7018
    3. Both a & b
    4. None of the above

2.     Gamma rays and X-rays are part of a family of waves called

    1. Acoustic waves
    2. Light waves
    3. Electromagnetic waves
    4. Transverse waves

3.     Why is hot – pass so-called?

    1. Because it is applied at a high amperage
    2. Because it is applied when the root is still hot
    3. Because it could cause ‘hot – shortness’
    4. Because it heat treats the root

4.     To weld a carbon steel which electrode will give the greatest deposition rate in SMAW?

    1. 2% Hydrogen
    2. Cellulosic
    3. Iron powder
    4. Rutile

5.     Tempering is often carried out to regain toughness after which of the following processes?

    1. Normalising
    2. Annealing
    3. Hardening
    4. Dwelling

6.     Incomplete root penetration in a butt joint could be caused by:

    1. Excessive root face width
    2. Excessive root gap and depth
    3. Low current setting
    4. Both A and C

7.     Welding a steel plate with a CE of 0.45 would require preheating to:

    1. Prevent the formation of chlorides
    2. Prevent hardening in the HAZ
    3. Prevent distortion
    4. Save weld time

8.     Pipe welding codes are set up by

    1. Welding Inspector
    2. Head of the state
    3. Associations, societies, insurance companies, manufacturers and the military.
    4. Company CEO

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

    1. Tensile strength
    2. Fatigue life
    3. Resistance to load
    4. Yield strength

10.   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?

    1. The weld would be hard and brittle
    2. The weld could bulge
    3. Reinforcement could be higher than usual
    4. Underfill and spatters would be comparatively more

11.   During TIG welding of austenitic stainless steel pipe, argon gas backing is used to;

    1. Prevent oxidation
    2. Prevent  linear indication
    3. Prevent blow holes
    4. None of the above

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

    1. It is too expensive
    2. The wire would be too thick
    3. The metal composition may be wrong
    4. The wire is too short

13.   Which gas to be used for shielding while doing welding of aluminium alloys by TIG welding?

    1. Nitrogen
    2. Carbon dioxide
    3. Argon/carbon dioxide mixture
    4. Argon

14.   In the welding of a butt joint from one side, the profile of the root bead is controlled by

    1. Bevel angle
    2. Root face
    3. Root gap
    4. All of the above

15.   Which one of the following types of steel would give rise to the formation of porosity when welded with an arc process?

    1. Fine grained steel
    2. Fully killed steel
    3. Semi killed steel
    4. Rimming steel

16.   The most common type of failure associated with sharp fillets, notches and undercut is

    1. Cree
    2. Fatigue
    3. Corrosion
    4. Sudden bend

17.   Low alloy steels with a high carbon equivalent will require …………. before welding

    1. No pre-heating
    2. High pre-heat temperatures
    3. Low pre-heat temperatures
    4. None of the above

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

    1. Electrode type
    2. Power plant type
    3. Electrode storage
    4. Day temperature

19.   A root bend test is used to test the amount of weld:

    1. Ductility
    2. Degree of freedom
    3. Hardness
    4. Crack orientation

20.   The second run in a three run butt weld using the stovepipe technique is known as the

    1. Sealing run
    2. Hot pass
    3. Intermediate run
    4. Capping

21.   In MAG/CO2 welding, which parameters give the greatest control of weld appearance during dip transfers or short-circuiting welding?

    1. Wire sick-out length
    2. Amperage
    3. Wire feed speed
    4. Inductance

22.   What constituent is needed in coating of electrode of an electrode to prevent formation of porosity in welding of rimming steel?

    1. Iron powder
    2. Calcium fluoride
    3. Calcium carbonate
    4. Silicon

23.   In the welding of Austenitic stainless steels, the electrode and plate material can be purchased with low carbon contents. The reason for this is to prevent?

    1. Cracking I the HAZ
    2. The formation of chromium carbides
    3. Cracking in the weld metal
    4. Distortion

24.   Incomplete penetration in a butt joint could be caused by:

    1. Excessive root face width
    2. Excessive root gap size
    3. Low current setting
    4. Both A & C

25.   The planar defect is:

    1. Incomplete fusion defects
    2. Slag inclusion
    3. Incomplete penetration
    4. Both A & C

26.   The main causes of porosity in welded joints are:

    1. Poor access
    2. Loss of gas shield
    3. “Dirty” materials
    4. All of the above

27.    A fatigue failure characteristic by the appearance of the fracture surface. It would be:

    1. Rough and torn
    2. Smooth
    3. Both A and B
    4. Neither A and B

28.   A metallurgical problem most associated with submerged arc welding is:

    1. Hydrogen cracking in HAZ
    2. Solidification cracking in the weld metal
    3. Hydrogen cracking in the weld metal
    4. Lamellar tearing in the weld metal

29.   In welding procedure term, a change in essential variable means

    1. Re-qualification of the welding procedure
    2. Possible change in the weld’s microstructure
    3. Possible change in t he mechanical properties
    4. All of the above

30.   Ultrasonic test is preferred over radiography due to:

    1. The ability to detect laminations
    2. The ability to find more defects
    3. Less cost
    4. Both a and c

Leave a Reply

Your email address will not be published. Required fields are marked *