What is meant by the term PWHT? a) Pipe weld heat treatment b) Pre weld heat treatment c) Post weld hydrogen tearing d) Post weld het treatment

What is meant by the term PWHT?  
a) Pipe weld heat treatment b) Pre weld heat treatment  
c) Post weld hydrogen tearing d) Post weld het treatment
by

1 Answer

Answer :

d) Post weld het treatment
by

Related questions

A post weld heat treatment may also be of benefit in minimizing the risk of weld decay, this heat treatment would be called? a) Stress relief b) Normalizing c) Quench and Tempering d) Solution treatment over 1000 °C

Description : A post weld heat treatment may also be of benefit in minimizing the risk of weld decay, this heat treatment would be called? a) Stress relief b) Normalizing c) Quench and Tempering d) Solution treatment over 1000 °C

Last Answer : d) Solution treatment over 1000 °C

Post weld heat treatment is done by (A) Normalising (B) Stress relieving (C) Tempering (D) Solution annealing

Description : Post weld heat treatment is done by (A) Normalising (B) Stress relieving (C) Tempering (D) Solution annealing

Last Answer : (B) Stress relieving

Why is post-weld heat treatment (stress relieving) sometimes necessary for welded vessels?

Description : Why is post-weld heat treatment (stress relieving) sometimes necessary for welded vessels?

Last Answer : During the welding process, the two metal pieces being joined are subject to extreme temperatures and can cause the crystalline structure of the metal to pass through various metallurgical phases. As a ... composition of the metals. Holding temperatures can range from 1100-1350 °F (593- 732 °C).

Full form of SPW? (i) Special pre heated weld (ii) Short preheated weld.* (iii) Short post heated weld (iv) None of above

Description : Full form of SPW? (i) Special pre heated weld (ii) Short preheated weld.* (iii) Short post heated weld (iv) None of above

Last Answer : (ii) Short preheated weld.*

Why would visual inspection of the excess weld metal at the bottom of a cross country pipeline be important? a) It is the most difficult area to weld b) It is the dirtiest part of the pipe as it is near the ground c) Welders always forget to weld the bottom d) It is the most difficult area to radiograph

Description : Why would visual inspection of the excess weld metal at the bottom of a cross country pipeline be important? a) It is the most difficult area to weld b) It is the dirtiest part of the pipe as ... ground c) Welders always forget to weld the bottom d) It is the most difficult area to radiograph

Last Answer : a) It is the most difficult area to weld

Can anybody translate this for me: "maar ik gestopt bij het klein strand"?

Description : Can anybody translate this for me: "maar ik gestopt bij het klein strand"?

Last Answer : it is not german, i can tell you that. google says, it is dutch: “but I stopped at the small beach”

When welding medium carbon steel plates over 100mm in thickness would the basic electrodes require any pre treatment before use? a) None if they were in a vacuum pack opened 8 hours prior to use b) None if they were in a sealed vacuum pack prior to use c) Heat to 500 °C for 2 hours if used outside d) Baked at 150°C for 4hours prior to use

Description : When welding medium carbon steel plates over 100mm in thickness would the basic electrodes require any pre treatment before use? a) None if they were in a vacuum pack opened 8 hours prior to use b) None if ... ) Heat to 500 °C for 2 hours if used outside d) Baked at 150°C for 4hours prior to use

Last Answer : b) None if they were in a sealed vacuum pack prior to use

The main problem with such a heat treatment of stainless steel pipe spools and the reason why it is not regularly employed is: a) Controlling the rate of the temperature rise b) Controlling the cooling c) The length of the soak period d) High risk of distortion

Description : The main problem with such a heat treatment of stainless steel pipe spools and the reason why it is not regularly employed is: a) Controlling the rate of the temperature rise b) Controlling the cooling c) The length of the soak period d) High risk of distortion

Last Answer : d) High risk of distortion

Cold cracking in the heat affected zone of a high strength steel weld can take place because of the (A) Retained austenite (B) Martensite formation (C) Relatively high sulphur content in the base metal (D) Sufficient hydrogen present in the welding arc

Description : Cold cracking in the heat affected zone of a high strength steel weld can take place because of the (A) Retained austenite (B) Martensite formation (C) Relatively high sulphur content in the base metal (D) Sufficient hydrogen present in the welding arc

Last Answer : (B) Martensite formation

What does the term WPQR means? a) Weld productivity quality review b) Weld production quality requirments c) Welding procedure

Description : What does the term WPQR means? a) Weld productivity quality review b) Weld production quality requirments c) Welding procedure

Last Answer : c) Welding procedure

What examines the inside of a weld in a steel oil pipe?

Description : What examines the inside of a weld in a steel oil pipe?

Last Answer : Need answer

A backing ring is used inside the pipe joint when making a (a) butt weld (b) fillet weld (c) sleeve weld (d) socket weld (e) tube weld.

Description : A backing ring is used inside the pipe joint when making a (a) butt weld (b) fillet weld (c) sleeve weld (d) socket weld (e) tube weld.

Last Answer : (a) butt weld

Pick out the wrong statement. (A) Cold cracking of a weld is due to the presence of hydrogen gas in the weld (B) True stress is given by, σ = σE (1 + εE), where σE and εE are engineering stress and engineering strain respectively (C) Phosphorous can be easily recovered in the iron blast furnace (D) High residual stress at the surface is beneficial for fatigue properties of a material

Description : Pick out the wrong statement. (A) Cold cracking of a weld is due to the presence of hydrogen gas in the weld (B) True stress is given by, σ = σE (1 + εE), where σE and εE ... in the iron blast furnace (D) High residual stress at the surface is beneficial for fatigue properties of a material

Last Answer : Option C

Weld decay can be minimized by specifying steel with: a) Higher carbon level b) higher chromium level c) lower carbon level d) lower chromium level

Description : Weld decay can be minimized by specifying steel with: a) Higher carbon level b) higher chromium level c) lower carbon level d) lower chromium level

Last Answer : c) lower carbon level

Weld decay will cause which of the following problems? a) A reduced resistance to corrosion b) a lower tensile strength c) The toughness is reduced d) The hardness will increase

Description : Weld decay will cause which of the following problems? a) A reduced resistance to corrosion b) a lower tensile strength c) The toughness is reduced d) The hardness will increase

Last Answer : a) A reduced resistance to corrosion

Weld decay is caused by the formation of a compound with carbon. The other element in this compound is: a) Manganese b) Sulphur c) Chromium d) Nickel

Description : Weld decay is caused by the formation of a compound with carbon. The other element in this compound is: a) Manganese b) Sulphur c) Chromium d) Nickel

Last Answer : c) Chromium

Weld decay occurs in which of the following steel types? a) Carbon/Manganese b) Low alloy c) Any stainless steel d) Austenitic stainless steels

Description : Weld decay occurs in which of the following steel types? a) Carbon/Manganese b) Low alloy c) Any stainless steel d) Austenitic stainless steels

Last Answer : d) Austenitic stainless steels

When MMA welding what will be the effect on the weld f the power source was changed from AC to DC-ve? a) None b) Higher deposition rate c) It would slightly increase the depth of penetration d) The arc would become unstable

Description : When MMA welding what will be the effect on the weld f the power source was changed from AC to DC-ve? a) None b) Higher deposition rate c) It would slightly increase the depth of penetration d) The arc would become unstable

Last Answer : b) Higher deposition rate

A butt weld has been made by MMA in a 50mm thick impact tested steel plate. The welding electrode used was a basic type, 5mm diameter. The measured welding parameters for one of the runs was 250 amps, 24 volts, using DC+ve polarity, and a ROL:of 180mm per min. What would be the arc energy? a) Insufficient information given to calculate the arc energy b) 1.9 kJ/mm c) 1.87 kJ/mm d) 2.0 kJ/mm

Description : A butt weld has been made by MMA in a 50mm thick impact tested steel plate. The welding electrode used was a basic type, 5mm diameter. The measured welding parameters for one of the runs was 250 amps, 24 volts, using DC ... given to calculate the arc energy b) 1.9 kJ/mm c) 1.87 kJ/mm d) 2.0 kJ/mm

Last Answer : d) 2.0 kJ/mm

Root and face bends from an 8mm thick butt weld require testing. The specimens are cut to 20mm wide. The code calls for a 4t bend. Which of the following rollers should be selected for the testing? a) 50mm radius b) 50mdiameter c) 32mm radius d) 32mm diameter

Description : Root and face bends from an 8mm thick butt weld require testing. The specimens are cut to 20mm wide. The code calls for a 4t bend. Which of the following rollers should be selected for the testing? a) 50mm radius b) 50mdiameter c) 32mm radius d) 32mm diameter

Last Answer : d) 32mm diameter

In a transverse WELD tensile test, if the break was in the weld metal, the sample would he: a) Rejected b) Acceptable if the UTS is equal to or greater than the specified UTS of the plate c) Retested d) Acceptable if the UTS is between 80 - 90% of the specified UTS of the plate

Description : In a transverse WELD tensile test, if the break was in the weld metal, the sample would he: a) Rejected b) Acceptable if the UTS is equal to or greater than the specified UTS of the plate c) Retested d) Acceptable if the UTS is between 80 - 90% of the specified UTS of the plate

Last Answer : b) Acceptable if the UTS is equal to or greater than the specified UTS of the plate

To assess the surface of a weld for direct inspection, the distance from the surface to eye should be a maximum of? a) 200mm b) 600mm c) 60mm d) 6000mm

Description : To assess the surface of a weld for direct inspection, the distance from the surface to eye should be a maximum of? a) 200mm b) 600mm c) 60mm d) 6000mm

Last Answer : b) 600mm

Why is it essential to clean the excess weld metal on completion of the production weld? a) So it can be ready for painting b) To remove any rust c) To ensure it is suitably clean for visual inspection and NDT d) To remove slag from the undercut

Description : Why is it essential to clean the excess weld metal on completion of the production weld? a) So it can be ready for painting b) To remove any rust c) To ensure it is suitably clean for visual inspection and NDT d) To remove slag from the undercut

Last Answer : c) To ensure it is suitably clean for visual inspection and NDT

Who has the final responsibility of sentencing and accepting a weld on completion? a) The contractor’s inspector b) Site manager c) The welder d) The client’s inspector or certifying authority

Description : Who has the final responsibility of sentencing and accepting a weld on completion? a) The contractor’s inspector b) Site manager c) The welder d) The client’s inspector or certifying authority

Last Answer : d) The client’s inspector or certifying authority

What information should be recorded as a minimum, on a completed production weld? a) Size and type of electrode and b) Welding supervisor’s name c) Welder’s Identification, date and weld number d) Welding inspectors name

Description : What information should be recorded as a minimum, on a completed production weld? a) Size and type of electrode and b) Welding supervisor’s name c) Welder’s Identification, date and weld number d) Welding inspectors name

Last Answer : c) Welder’s Identification, date and weld number

The welders have increased the voltage on the SAW welding set, what would be the effect on the weld appearance? a) No effect b) The weld width would be narrower c) The penetration will be increased d) The weld width would be wider

Description : The welders have increased the voltage on the SAW welding set, what would be the effect on the weld appearance? a) No effect b) The weld width would be narrower c) The penetration will be increased d) The weld width would be wider

Last Answer : d) The weld width would be wider

t is permissible to allow trainee welder to carry out production welding? a) Never b) Yes as long as the supervisor is happy with his workmanship standard c) Yes as long as he has the approved qualification to cover the intended scope of work d) Yes as long as no NDT is required on the finished weld

Description : t is permissible to allow trainee welder to carry out production welding? a) Never b) Yes as long as the supervisor is happy with his workmanship standard c) Yes as long as he has the approved ... cover the intended scope of work d) Yes as long as no NDT is required on the finished weld

Last Answer : a) Never

How is preheat for tack welds during assembly and fit up determined? a) By the welders as they have extensive knowledge b) The fabrication specification/WPS will give the requirements c) The fabrication drawing will give all the information d) Any temperature will do as it is only a tack weld

Description : How is preheat for tack welds during assembly and fit up determined? a) By the welders as they have extensive knowledge b) The fabrication specification/WPS will give the requirements c) The fabrication drawing will give all the information d) Any temperature will do as it is only a tack weld

Last Answer : b) The fabrication specification/WPS will give the requirements

Who determines what the correct weld preparation (root gap, root face, included angle) should be? a) The welding engineer b) The welding supervisor c) The welder will decide d) The inspector will recommend what is suitable

Description : Who determines what the correct weld preparation (root gap, root face, included angle) should be? a) The welding engineer b) The welding supervisor c) The welder will decide d) The inspector will recommend what is suitable

Last Answer : a) The welding engineer

Porcelain must not be contaminated by handling between which two stages: A. Pre-soldering and heat treatment B. Heat treatment and opaque /bake/ stages C. Opaque and bisque stages D. Bisque and glazing stages E. First opaque bake and second opaque bake

Description : Porcelain must not be contaminated by handling between which two stages: A. Pre-soldering and heat treatment B. Heat treatment and opaque /bake/ stages C. Opaque and bisque stages D. Bisque and glazing stages E. First opaque bake and second opaque bake

Last Answer : A. Pre-soldering and heat treatment

PNDT Full form [A] Pre-Natal Diagnostic Technique [B] Person Not Developed Term [C] Post National Democratic Tenure [D] None of the above

Description : PNDT Full form [A] Pre-Natal Diagnostic Technique [B] Person Not Developed Term [C] Post National Democratic Tenure [D] None of the above

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How do you put canned frosting on a cake without tearing up the cake?

Description : How do you put canned frosting on a cake without tearing up the cake?

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Paging through your photo albums, do you find yourself smiling more, tearing up, nodding your head in disbelief over how fast time went?

Description : Paging through your photo albums, do you find yourself smiling more, tearing up, nodding your head in disbelief over how fast time went?

Last Answer : answer:Oh, yes. Yes. I had about 20 rolls of 35 mm film, going back to 1995 that I just finished developing last year. I’d take 1–3 in every payday. THAT was a trip.

How do people react when they hear someone tearing a paper?

Description : How do people react when they hear someone tearing a paper?

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How can I shave without the feeling of tearing my face up?

Description : How can I shave without the feeling of tearing my face up?

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Any suggestions for reducing tearing up while cutting an onion?

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Has any one ever heard of using a product such as anti-stretch mark cream to increase the skins elasticity to ease gauging pain and/or lower the chance of tearing?

Description : Has any one ever heard of using a product such as anti-stretch mark cream to increase the skins elasticity to ease gauging pain and/or lower the chance of tearing?

Last Answer : If you gauge correctly, that would be slowly and by a professional piercer, you shall not risk tearing. I cannot imagine any ointment making any difference.

I found a crack in my basement wall behind the insulation that the builder originally installed. Is it ok to finish the basement without tearing down all of the insulation to inspect?

Description : I found a crack in my basement wall behind the insulation that the builder originally installed. Is it ok to finish the basement without tearing down all of the insulation to inspect?

Last Answer : Is the house new? If so the builder might still be responsible for repairs. And yes, if there is moisture around the crack you need to have that looked at. You do not want to finish out ... french drains outside to deal with the water / moisture issue that started the cracking in the first place.

What you think of Sinéad O'Conner tearing up Pope John Paul II foto on Saturday Night Live TV Show?

Description : What you think of Sinéad O'Conner tearing up Pope John Paul II foto on Saturday Night Live TV Show?

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Why is the tearing of paper a physical change not a chemical change?

Description : Why is the tearing of paper a physical change not a chemical change?

Last Answer : Found a possible answer =/ http://answers.yahoo.com/question/index?qid=20081017160844AAXQ9jE

Anyone know a SURE way to get rid of a golpher that is tearing up my yard?

Description : Anyone know a SURE way to get rid of a golpher that is tearing up my yard?

Last Answer : Point him to the nearest golf course.

Why is paper stronger (resists tearing) more at the perforation than elsewhere?

Description : Why is paper stronger (resists tearing) more at the perforation than elsewhere?

Last Answer : answer:I never noticed that. It probably has something to do with the place on the cheque you're holding on to. That matters a lot. Also, the embroidery (my cheques have that) with metal ... cheque) vs. the lesser force (perforations), the more likely the cheque will crumble under your fingers.

tearing a piece of paper in half physical or chemical change?

Description : tearing a piece of paper in half physical or chemical change?

Last Answer : Physical change

How to remove a tick without tearing?

Description : Do you twist with a tick when publishing? I don't want to rip it off.

Last Answer : Slowly tick from side to side with the tick until it releases.

My socks are tearing at my shoes.

Description : When I take off my shoes, I have a hole in my thumb. What to do with it?

Last Answer : Buy quality socks ..... cut your nails ... get a better number of shoes (bigger) ☢ ☠ ☣ ☠ ☣ ☠ ☣ ☠ ☢

what to charge by squar foot tearing out old carpet , padding , tac strips and staples

Description : what to charge by squar foot tearing out old carpet , padding , tac strips and staples

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What of these is responsible for cutting tearing and grinding food?

Description : What of these is responsible for cutting tearing and grinding food?

Last Answer : its ur TEETH

How to Stop a Cat From Tearing Up Your Carpet?

Description : How to Stop a Cat From Tearing Up Your Carpet?

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Tearing down a small shed?

Description : Tearing down a small shed?

Last Answer : An adult who has never been immunized to tetanus should get the initial series of three tetanus shots. A booster should be administered every ten years afterwards. A booster may be given after an acute injury (i.e. puncture by rusty nail) if you are not sure when your last booster shot was.