Mechanical Engineering MCQ with Answers
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Why is it sometimes necessary to preheat the base material before welding?
Why is it sometimes necessary to preheat the base material before welding?
Open 170Which of the following could be used to minimize the occurrence of solidification cracking in steel welds?
Which of the following could be used to minimize the occurrence of solidification cracking in steel welds?
Open 171Which BS EN standard is used for welding symbols on drawings?
Which BS EN standard is used for welding symbols on drawings?
Open 172What does the term WPQR mean?
What does the term WPQR mean?
Open 173The WPS calls for a root gap to be between 2 and 3 mm, the actual measured gap is 4 mm, what course of action would you take?
The WPS calls for a root gap to be between 2 and 3 mm, the actual measured gap is 4 mm, what course of action would you take?
Open 174Who should have access to WPQRS?
Who should have access to WPQRS?
Open 175During root welding, which of the following would be the main cause of excess penetration?
During root welding, which of the following would be the main cause of excess penetration?
Open 176The welder had increased the voltage on the SAW welding set, what would be the effect on the weld?
The welder had increased the voltage on the SAW welding set, what would be the effect on the weld?
Open 177What is the maximum OCV allowable to initiate an arc when using AC current?
What is the maximum OCV allowable to initiate an arc when using AC current?
Open 178Why is the OCV capped at this voltage setting?
Why is the OCV capped at this voltage setting?
Open 179What information would be recorded as a minimum on a completed production weld?
What information would be recorded as a minimum on a completed production weld?
Open 180Why would visual inspection of the excess weld material at the bottom of a cross-country pipeline be important?
Why would visual inspection of the excess weld material at the bottom of a cross-country pipeline be important?
Open 181Why is it essential to clean the excess weld metal on completion of the production weld?
Why is it essential to clean the excess weld metal on completion of the production weld?
Open 182To assess surface of a weld for indirect inspection, the distance from the surface to the eyes should be a maximum of
To assess surface of a weld for indirect inspection, the distance from the surface to the eyes should be a maximum of
Open 183What is the recommended minimum range of illumination required by BS EN 970 for inspection of a welded surface?
What is the recommended minimum range of illumination required by BS EN 970 for inspection of a welded surface?
Open 184Why is the post weld heat treatment carried out?
Why is the post weld heat treatment carried out?
Open 185Pure argon is used with the MIG process to weld which material?
Pure argon is used with the MIG process to weld which material?
Open 186What do the first 2 numbers in MMA electrode represent to EN classification?
What do the first 2 numbers in MMA electrode represent to EN classification?
Open 187The term manual welding is used when the welder controls?
The term manual welding is used when the welder controls?
Open 188What is the main difference between EN and ASME welding procedure?
What is the main difference between EN and ASME welding procedure?
Open 189Which of the following would not be required before welding?
Which of the following would not be required before welding?
Open 190In GMAW MIG/MAG welding, which mode of metal transfer uses frequencies in cycle time?
In GMAW MIG/MAG welding, which mode of metal transfer uses frequencies in cycle time?
Open 191Weld decay can be minimized by specifying a steel with
Weld decay can be minimized by specifying a steel with
Open 192Post weld heat treatment is used to reduce
Post weld heat treatment is used to reduce
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