Q:- A STAR test is carried out to determine which of the following?

(A). A quick indication of weld quality for welder qualification test
(B). The test result can be used to verify that the material has not been adversely mechanically damaged by the heat during welding
(C). An indication of material elongation properties 

(D). An indication of through thickness ductility (in the Z direction)

Q:- Prior to production welding commencing you notice that the drawing has been revised and now Includes a pipe with a wall thickness of 36mm, your WPS only covers wall thickness of 28mm, what course of action would you follow?

A. Continuous with production welding as the difference is less than 10%
B. Apply for a concession to change the thickness to permit the welding on the 36mm wall thick pipe
C. Change the range on the WPS to 36mm and allow welding to commence
D. Allowing welding to commence then apply for a concession

Q:- Assuming the name material and welding procedure were used, which of the following would require the highest preheat?

1. But weld in 35mm plate
2. Cruciform joint in 25mm plate
3. Tee joint butt welded in 30mm plate1
4. tee joint fillet welded in 20mm plate

Q:- When reviewing a radiograph of a weld made by the MAG(GMAW)process, you notice a very bright white inclusion in the weld, which of the following best describes this indication

1. Tungsten inclusion
2. Spatter on the cap
3. Copper inclusion
4. It is most likely to be a film mark

Q:-Why is stress relief (PWHT) some times carried out on weldments :

(a) To dissolve entrapped hydrogen.

(b) To remove residual stresses.

(c) To fuse planar defects.

(d) All of the above.

Q:- In friction welding, is the metal at the interface in the :

(a) Liquid state.
(b) Solid state.
(c) Plastic state.
(d) Elastic state.

Q:-Most metals expand when heated, the change in length is expressed as :

(a) Thermal conductivity.

(b) Modulus of elasticity.

(c) Coefficient.

(d) Yielding.

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Q:- Which of the following statements is true :

(a) Oxygen-fuel gas cutting is essentially an oxidization thermal cutting Process.

(b) Oxygen-fuel gas cutting is essentially a melting process.

(c) The only fuel gas used is acetylene.

(d) Propane is the preferred fuel gas in oxygen-fuel gas cutting as it produces Hotter flame.

Q:- Three essential factors for producing fusion weld are melting, removal of surface oxide from the joint surfaces and elimination of atmosphere from the region of the arc. Name the fourth one :

(a) The weld must be free from stress.

(b) The filler material must match that of the weld.

(c) The completed joint must at lease match the mechanical properties.

(d) An arc for a heat surface.

Q:- Which one of the following statements is false :

(a) Surface breaking defects are usually more detrimental to a weld in Comparison with sub-surface defects.

(b) The HAZ's of a steel weld usually have a higher tensile strength than The weld metal.

(c) Lameller tearing may occur within the fusion zone of large fillet welds.

(d) PWHT may stress relieve.

Q:- What is the possible cause of too mush restraint of the parent material during welding :

(a) Restraint is always desirable.

(b) It may lead to cracking, especially with small welds between large components.

(c) It will cause too much distortion.

(d) It will cause lamellar tearing if it is present on a corner joint.

Q:-A martensite grain structure :

(a) Is always present in welds on steel.

(b) Is brittle grain structure .

(c) Is obtained when the preheat temperature exceeds 200*c

Q:- Which of the following standards is entitled imperfections in Metallic fusion welds With explanation :

(a) BS EN 25817.

(b) BS EN 26520.

(c) BS EN 22553.

(d) BS EN 24165.

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Q:-High Phosphorous contents in carbon steels may cause :

(a) Cold shortness.

(b) Hot shortness.

(c) An increase in ductility.

(d) An increase in malleability.

Q:- How do you convert psi to N/mm2 :

(a) Divide by 144.9.

(b) Multify by 25.4.

(c) Divide by 14.7.

(d) Multify by 14.7.

Q:-How many Mpa are equal to 1 N/mm2 :

(a) 144.9. 

(b) 25.4. 

(c) 14.7. 

(d) 1.

Q:- What is the UTS of a material :

(a) The proof stress.
(b) The maximum load a specimen can withstand.
(c) The limit of proportionality.
(d) The point of plastic deformation.

Q:- What is the purpose of a rectifier :

(a) To adjust the voltage.
(b) To adjust the amperage.
(c) To covert ac to dc.
(d) To reduce the chance of arc strike

Q:- welding process using equipment with a flat characteristic :

(a) Will require a permanent or temporary backing to be pre placed on the Root side of the welds.

(b) Has the advantage of being able to use any type or size of electrode.

(c) Is likely to be using an electrode less than 2 mm dia.

(d) Is likely to be using an electrode more than 2 mm dia.

Q:- Which of the following is discontinuity which might be found in sand casting :

(a) Incomplete penetration.
(b) Undercut.
(c) Pipe.
(d) Shrinkage.