CSWIP 3.1 Paper Seven Questions And Answers

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1.

Which physical test is more likely to reveal HAZ embrittlement?

 a. Transverse tensile

 b. All weld tensile

 c. Root bend

 d. Charpy impact

2.

In submerged arc welding, which of the following width-to-depth ratios would be likely to result in solidification cracking?

 a. 1 : 3

 b. 3: 1

 c. 2: 1

 d. 1: 1

3.

If pipe bores are not matched correctly it can result in:

 a. Lack of root penetration

 b. Incorrect gap setting

 c. Excessive root faces

 d. Overheating during welding

4.

Two low carbon steel pipes, 150mm diameter, and 6mm wall thickness, are to be butt welded using the TIG process. To ensure a full-strength joint, which of the following preps is most suitable?

 a. Open single bevel

 b. Open single Vee

 c. Open square preparation

 d. Closed square preparation

5.

You are responsible for controlling welding on site. A large incidence of porosity has been reported in recent welding. Would you investigate?

 a. The electrode type

 b. Power source

 c. Electrode storage

 d. Day temperature

6.

Which of the following destructive tests is not normally required for welder approval?

 a. Bend tests

 b. Macro examination

 c. Impact tests

 d. Fracture tests

7.

Which type of electrode coating gives the most voluminous gas shield?

 a. Rutile

 b. Basic

 c. Oxidising

 d. Cellulosic

8.

A correctly made tack weld should slope from the middle to the ends in order to:

 a. Aid better penetration at the join-up

 b. Prevent porosity at the join-up

 c. Reduce the electrode size required

 d. Reduce the overall consumable consumption

9.

Submerged arc welds made with re-cycled flux are liable to:

 a. Porosity

 b. Course grain size

 c. Undercut

 d. Incomplete penetration

10.

Too large a diameter of filler rod should not be used to make a welded joint because:

 a. Excess reinforcement profile will be difficult to obtain

 b. The included bevel angle will have to be reduced

 c. Root fusion may be difficult to obtain

 d. The gap setting will have to be changed

11.

Incomplete penetration in a single ‘V’ butt joint could be caused by:

 a. Too large a root gap

 b. Too small a root gap

 c. Too high a heat input

 d. Too small a root face

12.

Which organization publishes the most commonly used code for boiler and pressure vessel welding?

 a. American Welding Society

 b. American Society of Mechanical Engineers

 c. American Petroleum Institute

 d. American National Standards Institute

13.

Which of the following steels is likely to be more susceptible to hydrogen cracking?

 a. Carbon equivalent of less than 0.25 %

 b. Carbon equivalent of 0.35%

 c. Carbon equivalent of 0.38%

 d. Carbon equivalent of 0.43%

14.

The main reason why all adhering scales should be removed when the pipe end preparation is made by oxy-gas cutting is?

 a. Oxidisation of the weld metal is minimised

 b. The speed of welding is increased

  c. Pipe bore alignment is made easier

 d. Reduction of the weld deposit is prevented

15.

A low hydrogen electrode, according to BS 639, would contain:

 a. No hydrogen

 b. Less than 15 ml of hydrogen per 100 grams of deposited weld metal

 c. Between 15 ml and 25 ml of hydrogen per 100 grams of deposited weld metal

 d. Less than 25 ml of hydrogen per 100 grams of deposited weld metal

16.

When is manual metal arc welding low carbon steel, which electrode covering will give the greatest degree of penetration?

 a. Iron powder

 b. Rutile

 c. Cellulosic

 d. Low hydrogen

17.

The second run in a three-run butt weld using the stovepipe technique is known as the:

 a. Filling run

 b. Hot pass

 c. Intermediate run

 d. Sealing run

18.

When tungsten arc gas shielded welding stainless steel, which one of the following should be used?

 a. Alternator

 b. A. C. transformer

 c. D. C. generator

 d. Constant potential rectifier

19.

The purpose of a nick break specimen is to provide a test for:

 a. Tensile strength and fracture appearance

 b. Ductility and fracture appearance

 c. Elongation and fracture appearance

 d. Soundness and fracture appearance

20.

You could determine that an electrode is cellulosic by its:

 a. BS 639 coding

 b. Colour

 c. Trade name

 d. BS 499 coding

21.

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

 a. Too high a current setting

 b. Too long a pause in the down cycle of the weave

 c. Lack of fusion and penetration

 d. Too high a travel speed

22.

Which gas shroud should be used when tungsten arc gas-shielded welding aluminum alloys?

 a. Nitrogen

 b. Carbon dioxide

 c. Argon/carbon dioxide mixture

 d. Argon

23.

What would be observed if a fillet weld were sectioned and macro-etched?

 a. The grain of the other beads is coarser than the final bead

 b. The penetration and fusion into the root is very deep

 c. Each bead appears to be distinctly separated from the adjoining beads

 d. The grain structure remains the same in all passes

24.

Preheating and inter pass heating are used primarily for:

 a. Aiding fusion

 b. Reducing hydrogen content of weld preparation prior to welding

 c. Ensure a fine grain size

 d. Slow down the cooling rate after welding

25.

The most common type of defect found in a structure when it is undergoing service is:

 a. Fatigue cracking

 b. Crystallisation

 c. Weld decay

 d. Stress fracture

26.

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

 a. Ductility

 b. Elongation

 c. Hardness

 d. Penetration

27.

In the examination of a welded aluminum joint, macro etching may reveal:

 a. Lack of inter-run penetration

 b. Carbon pick-up

 c. Weld decay

 d. Micro cracks

28.

The different grain structure between the weld deposit and the base metal can be determined by:

 a. A face bend test

 b. A root bend test

 c. A hardness test

 d. An etching test

29.

MMA welds made with damaged electrode coatings are subject to:

 a. Porosity

 b. Undercut

 c. Excessive penetration

 d. Excessive bead height

30.

Pipe welding codes are set up by:

 a. Welding operators

 b. State governments

 c. Associations, societies, insurance companies, manufacturers, and the military

  d. Construction unions

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