Why is the FCA welding process not used for open root critical welds?

Why is the FCA welding process not used for open root critical welds?
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Who should select the specific welds for NDT, to cover the 10% contractual percentage required by the specification/Code? a) Anyone can select the welds as its just a random choice b) The welder as he knows which welds are likely to produce the least defects c) This will be referenced in the inspection and test plan d) Nobody, as welding is always carried out to a high standard the use of percentage NDT is of no real value

Description : Who should select the specific welds for NDT, to cover the 10% contractual percentage required by the specification/Code? a) Anyone can select the welds as its just a random choice b) The welder ... welding is always carried out to a high standard the use of percentage NDT is of no real value

Last Answer : c) This will be referenced in the inspection and test plan

A second order liquid phase reaction, A → B, is carried out in a mixed flow reactor operated in semi batch mode (no exit stream). The reactant A at concentration CAF is fed to the reactor at a volumetric flow rate of F. The volume of the reacting mixture is V and the density of the liquid mixture is constant. The mass balance for A is (A) d(VCA )/dt = -F (CAF - CA ) - kCA 2V (B) d(VCA )/dt = F (CAF - CA ) - kCA 2V (C) d(VCA )/dt = -FCA - kCA 2V (D) d(VCA )/dt = FCAF - kCA 2V

Description : A second order liquid phase reaction, A → B, is carried out in a mixed flow reactor operated in semi batch mode (no exit stream). The reactant A at concentration CAF is fed to the reactor at a volumetric flow rate of F. The volume ... 2V (C) d(VCA )/dt = -FCA - kCA 2V (D) d(VCA )/dt = FCAF - kCA 2V

Last Answer : (D) d(VCA )/dt = FCAF - kCA 2V

What are Short welds made to hold a joint in proper alignment are called?

Description : What are Short welds made to hold a joint in proper alignment are called?

Last Answer : Feel Free to Answer

Parallel fillet welds are under (i) Shear stress (ii)Compressive stress (iii)Tensile stress (iv)None

Description : Parallel fillet welds are under (i) Shear stress (ii)Compressive stress (iii)Tensile stress (iv)None

Last Answer : (i) Shear stress

Transverse fillet welds are under (i) Bending and shear stresses (ii)Compressive and torsion shear stresses (iii)Tensile and compressive stresses (iv)None

Description : Transverse fillet welds are under (i) Bending and shear stresses (ii)Compressive and torsion shear stresses (iii)Tensile and compressive stresses (iv)None

Last Answer : (iv)None

Transverse fillet welds are under (i) Shear stress (ii) Compressive stress (iii) Tensile stress

Description : Transverse fillet welds are under (i) Shear stress (ii) Compressive stress (iii) Tensile stress

Last Answer : (iii) Tensile stress

Butt welds are under (i) Shear stress (ii) Compressive stress (iii) Tensile stress

Description : Butt welds are under (i) Shear stress (ii) Compressive stress (iii) Tensile stress

Last Answer : (iii) Tensile stress

Parallel fillet welds are under  Shear and bending stresses  Compressive and torsion shear stresses  Tensile and compressive stresses  None

Description : Parallel fillet welds are under  Shear and bending stresses  Compressive and torsion shear stresses  Tensile and compressive stresses  None

Last Answer :  None

Magnetic crack detection method in the welds is destructible examination. a) True b) False

Description : Magnetic crack detection method in the welds is destructible examination. a) True b) False

Last Answer : b) False

While calculating bending stress in the following welded joints which of the welds moment of inertia can be neglected? a) 1 b) None of the listed c) Both 1 & 3 d) Both 2 & 4

Description : While calculating bending stress in the following welded joints which of the welds moment of inertia can be neglected? a) 1 b) None of the listed c) Both 1 & 3 d) Both 2 & 4

Last Answer : b) None of the listed

Calculate the moment of inertia about the axis parallel to welds and shift it to CG by considering thickness of welds t. a) tɜ+2000t b) None of the listed c) 250000 t d) 125000 t

Description : Calculate the moment of inertia about the axis parallel to welds and shift it to CG by considering thickness of welds t. a) tɜ+2000t b) None of the listed c) 250000 t d) 125000 t

Last Answer : c) 250000 t

A bracket is shown welded to a vertical column by means of two fillet welds. The bending stress induced in the welds can be given by a) My/I b) 2My/I c) My/2I d) None of the listed

Description : A bracket is shown welded to a vertical column by means of two fillet welds. The bending stress induced in the welds can be given by a) My/I b) 2My/I c) My/2I d) None of the listed

Last Answer : a) My/I

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

Are there any methods of preventing cracking of carbon steel welds in refining environments?

Description : Are there any methods of preventing cracking of carbon steel welds in refining environments?

Last Answer : Where carbon steel is an appropriate material of construction, NACE (National Association of Corrosion Engineers) has issued the following standard: NACE RP0472, Methods and controls to prevent in service ... shall be tested. G. Welds that exceed 200 Brinell shall be heat treated or removed.

For joints in service in the creep range which of the following is recommended by ASME B16.5? a) Replacement of the joint after 1,000,000 hours of service. b) Periodic tightening of the bolts to prevent leakage. c) Immediate replacement is recommended if the material operates in the creep range. d) Regular flow detection inspection of the piping to fitting welds.

Description : For joints in service in the creep range which of the following is recommended by ASME B16.5? a) Replacement of the joint after 1,000,000 hours of service. b) Periodic tightening of ... the material operates in the creep range. d) Regular flow detection inspection of the piping to fitting welds.

Last Answer : b) Periodic tightening of the bolts to prevent leakage.

Tandem rig test with 450 probe for AT weld detects. (i) Horizontal longitudinal defect in weld. (ii) Vertical oriented defect in AT weld.* (iii) Transverse defect in AT weld. (iv) Defect in flange of AT welds.

Description : Tandem rig test with 450 probe for AT weld detects. (i) Horizontal longitudinal defect in weld. (ii) Vertical oriented defect in AT weld.* (iii) Transverse defect in AT weld. (iv) Defect in flange of AT welds.

Last Answer : (ii) Vertical oriented defect in AT weld.*

After how much time lining of crucible should be changed ? (i) After every weld (ii) After 7 welds (iii) After every 10 welds* (iv) None of the above

Description : After how much time lining of crucible should be changed ? (i) After every weld (ii) After 7 welds (iii) After every 10 welds* (iv) None of the above

Last Answer : (iii) After every 10 welds*

Testing of welds by a) Dye penetrant test b) Magnetic particle inspection c) Radiographic inspection d) All the above*

Description : Testing of welds by a) Dye penetrant test b) Magnetic particle inspection c) Radiographic inspection d) All the above*

Last Answer : d) All the above

want to learn down hill root pass for pipe line welding?

Description : want to learn down hill root pass for pipe line welding?

Last Answer : want get my certificate in welding you got any schools i can get that in NC

During root welding, which of the following would be the main cause of excess penetration? a) The root gap is too small in accordance with WPS b) Preheat not used c) The current is too high d) Root face is too large

Description : During root welding, which of the following would be the main cause of excess penetration? a) The root gap is too small in accordance with WPS b) Preheat not used c) The current is too high d) Root face is too large

Last Answer : c) The current is too high

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

Quantity is not a part of the weld symbol (i)Dark circle (ii) Open circle (iii) Angle of weld (iv)Starting and stopping allowance for welding

Description : Quantity is not a part of the weld symbol (i)Dark circle (ii) Open circle (iii) Angle of weld (iv)Starting and stopping allowance for welding

Last Answer : (iv)Starting and stopping allowance for welding

Among the critical stages, the most critical stage of wheat crop for irrigation is—(A) CRI–Crown Root Initiation stage (B) Tillering stage (C) Jointing stage (D) Flowering stage

Description : Among the critical stages, the most critical stage of wheat crop for irrigation is—(A) CRI–Crown Root Initiation stage (B) Tillering stage (C) Jointing stage (D) Flowering stage

Last Answer : (A) CRI–Crown Root Initiation stage

In which crop crown root initiation is critical growth stage for irrigation? a. Maize b. Rice c. Sugarcane d. Wheat

Description : In which crop crown root initiation is critical growth stage for irrigation? a. Maize b. Rice c. Sugarcane d. Wheat

Last Answer : d. Wheat

In which crop crown root initiation is critical growth stage for irrigation? a. Maize b. Rice c. Sugarcane d. Wheat

Description : In which crop crown root initiation is critical growth stage for irrigation? a. Maize b. Rice c. Sugarcane d. Wheat

Last Answer : d. Wheat

Which process is used in welding the gaps in railway tracks ?

Description : Which process is used in welding the gaps in railway tracks ?

Last Answer : Gold Schmidt’s alumino thermi process

Process of welding with respect to riveting takes a. More time b. Less time c. Same time d. None

Description : Process of welding with respect to riveting takes a. More time b. Less time c. Same time d. None

Last Answer : b. Less time

In a fusion welding process, (a) only heat is used (b) only pressure is used (c) combination of heat and pressure is used (d) none of these

Description : In a fusion welding process, (a) only heat is used (b) only pressure is used (c) combination of heat and pressure is used (d) none of these

Last Answer : (a) only heat is used

Laser welding is widely employed in the __________ industries. (A) Electronic (B) Structural (C) Process (D) Heavy

Description : Laser welding is widely employed in the __________ industries. (A) Electronic (B) Structural (C) Process (D) Heavy

Last Answer : Option A

Laser welding is widely employed in the __________ industries. (A) Electronic (B) Structural (C) Process (D) Heavy

Description : Laser welding is widely employed in the __________ industries. (A) Electronic (B) Structural (C) Process (D) Heavy

Last Answer : Option A

Q-7 during welding process, why sinusoidal wave form is converted in to the square wave form?

Description : Q-7 during welding process, why sinusoidal wave form is converted in to the square wave form?

Last Answer : In sinusoidal wave, we get maximum energy at one point only. So for the more amount of maximum energy we can get by converting the sinusoidal wave form in to the square wave form, and more penetration and deposition rate is achieved due to maximum energy.

Which of the following defects is usually associated with the MAG GMAW) welding process when using Dip Transfer? a) Centerline cracking b) Lack of side wall Fusion c) Undercut d) Tungsten inclusions

Description : Which of the following defects is usually associated with the MAG GMAW) welding process when using Dip Transfer? a) Centerline cracking b) Lack of side wall Fusion c) Undercut d) Tungsten inclusions

Last Answer : b) Lack of side wall Fusion

What is the mode of metal transfer for the TIG (GTAW) welding process? a) Spray Transfer b) Globular Transfer c) Dip Transfer d) None of the above

Description : What is the mode of metal transfer for the TIG (GTAW) welding process? a) Spray Transfer b) Globular Transfer c) Dip Transfer d) None of the above

Last Answer : d) None of the above

What is a typical ARC voltage setting when welding with the TIG (GTAW) process? a) 18-20V b) 24-26V c) 10-12V d) 70-90V

Description : What is a typical ARC voltage setting when welding with the TIG (GTAW) process? a) 18-20V b) 24-26V c) 10-12V d) 70-90V

Last Answer : c) 10-12V

In AT welding process what is the role of asbestos powder & slag ? (i) To separate closing pin from portion* (ii) To hold the portion (iii) Both above are correct (iv) None of the above

Description : In AT welding process what is the role of asbestos powder & slag ? (i) To separate closing pin from portion* (ii) To hold the portion (iii) Both above are correct (iv) None of the above

Last Answer : (i) To separate closing pin from portion*

In AT welding process what is the role of closing pin ? (i) To hold the portion before melt (ii) To hold the asbestos powder & slag (iii) Both above are correct* (iv) None of the above

Description : In AT welding process what is the role of closing pin ? (i) To hold the portion before melt (ii) To hold the asbestos powder & slag (iii) Both above are correct* (iv) None of the above

Last Answer : (iii) Both above are correct*

Explain the resistance spot welding process with neat sketch. State its two advantage and disadvantage.

Description : Explain the resistance spot welding process with neat sketch. State its two advantage and disadvantage. 

Last Answer : Resistance Spot welding: Spot welding is employed to join overlapping strips, sheets or plates of metal at small areas .The pieces are assembled between two electrodes, which must possess high electrical & thermal ... for making the RSW a success. 4. The thick jobs are not easy to weld. 

Explain seam welding process with the help of neat sketch.

Description : Explain seam welding process with the help of neat sketch.

Last Answer : Seam Welding is a Resistance Welding (RW) process used for producing continuous joint of overlapping sheets by passing them between two rotating electrode wheels. Heat generated by the electric current flowing through ... the electrodes and cool the work rapidly to speed up the operation.    

List common equipments used for arc welding process.

Description : List common equipments used for arc welding process.

Last Answer : 1. A.C. or D.C. machine 2. Electrode (bare or coated) 3. Electrode Holder 4. Cables and its connectors 5. Chipping Hammer 6. Earthing Clamps 7. Wire-brush 8. Helmet 9. Safety Goggles 10. Hand Gloves 11. Apron Sleeves etc.

Classify butt welding process.

Description : Classify butt welding process.

Last Answer : Classification of Butt Welding Processes: 1. Flash Butt Welding 2. Resistance Butt Welding 3. Hand Welding 4. Upset Welding

Give classification of welding process.

Description : Give classification of welding process.

Last Answer : Classification of Welding Process a. Arc welding 1) Carbon Arc Welding; 2) Shielded Metal Arc Welding (SMAW) 3) Submerged Arc Welding (SAW) 4) Metal Inert Gas Arc Welding (MIG, GMAW) 5) ... (USW) e. Thermit Welding (TW) f. Electron Beam Welding (EBW) g. Laser Welding (LW)

Give detail classification of welding. State important factors upon which selection of welding process depends.

Description : Give detail classification of welding. State important factors upon which selection of welding process depends. 

Last Answer : Answer: Classification of Welding 1. Arc welding a. Carbon Arc Welding; b. Shielded Metal Arc Welding (SMAW) c. Submerged Arc Welding (SAW) d. Metal Inert Gas Welding (MIG, ... workers 14. Cost of materials 15. Code or specification requirements 16. Mechanical properties desired in joints 

Explain TIG (GTAW) welding process with neat sketch.

Description : Explain TIG (GTAW) welding process with neat sketch.

Last Answer : Tungsten Inert Gas Arc Welding (TIG, GTAW): It is a welding process, in which heat is generated by an electric arc struck between a nonconsumable tungsten electrode and the work piece. The weld pool is ... produces a high quality weld of most of metals. Flux is not used in the process.  

Describe with a neat diagram, the process of any one type of electric welding.

Description : Describe with a neat diagram, the process of any one type of electric welding. 

Last Answer : Methods of electric welding :  1. Resistance welding  i Butt welding  ii Spot welding  iii Seam welding  iv Projection welding  2. Arc Welding  i Carbon arc welding  ii ... as copper, iron etc. The electric arc effectively concentrate heat on the surfaces it is desired to join.

In open channel flow in a rectangular channel, the ratio between the critical depth and the initial depth, when a hydraulic jump occurs is (A) 0.5 (B) 0.84 (C) 1.84 (D) 1.25

Description : In open channel flow in a rectangular channel, the ratio between the critical depth and the initial depth, when a hydraulic jump occurs is (A) 0.5 (B) 0.84 (C) 1.84 (D) 1.25

Last Answer : (C) 1.84

While determining the yield of open wells by the pumping test (A) Velocity of recharging water, increases with depression head (B) Depression head resulting at critical velocity, is called critical depression head (C) Working head is generally limited to (D) Maximum safe yield of an open well, is expected at critical depression head

Description : While determining the yield of open wells by the pumping test  (A) Velocity of recharging water, increases with depression head  (B) Depression head resulting at critical velocity, is called critical ... (D) Maximum safe yield of an open well, is expected at critical depression head 

Last Answer : (D) Maximum safe yield of an open well, is expected at critical depression head 

__________ number determines whether the fluid flow in an open channel is supercritical, critical or sub-critical. (A) Mach (B) Reynolds (C) Froude (D) Weber

Description : __________ number determines whether the fluid flow in an open channel is supercritical, critical or sub-critical. (A) Mach (B) Reynolds (C) Froude (D) Weber

Last Answer : (C) Froude

12. The flow at critical depth in an open channel is called torrential flow. A) Yes B) No

Description : 12. The flow at critical depth in an open channel is called torrential flow. A) Yes B) No

Last Answer : B

If the depth of water in an open channel is greater than the critical depth, the flow is called (A) Critical flow (B) Turbulent flow (C) Tranquil flow (D) Torrential flow

Description : If the depth of water in an open channel is greater than the critical depth, the flow is called (A) Critical flow (B) Turbulent flow (C) Tranquil flow (D) Torrential flow

Last Answer : Answer: Option C

If the depth of water in an open channel is less than the critical depth, the flow is called (A) Critical flow (B) Turbulent flow (C) Tranquil flow (D) Torrential flow

Description : If the depth of water in an open channel is less than the critical depth, the flow is called (A) Critical flow (B) Turbulent flow (C) Tranquil flow (D) Torrential flow

Last Answer : Answer: Option D