Mechanical Engineering MCQ with Answers
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Assuming the same material and the welding procedure were used, which of the following would require the highest preheat?
Assuming the same material and the welding procedure were used, which of the following would require the highest preheat?
Open 26Which of the following electrode types will produce the lowest level of hydrogen?
Which of the following electrode types will produce the lowest level of hydrogen?
Open 27At what level the hardness value a problem when trying to minimize the risk of H2 cracking?
At what level the hardness value a problem when trying to minimize the risk of H2 cracking?
Open 28Lamellar tearing can be detected by which of the following NDT method?
Lamellar tearing can be detected by which of the following NDT method?
Open 29Electrodes classified as E43 22(B EN 499) and E6010 (AWB A5.1) would usually
Electrodes classified as E43 22(B EN 499) and E6010 (AWB A5.1) would usually
Open 30Which of the following defects are most difficult to size correctly when ultrasonically testing a weld?
Which of the following defects are most difficult to size correctly when ultrasonically testing a weld?
Open 31What is the greatest advantage of radiographic inspection over ultrasonic inspection?
What is the greatest advantage of radiographic inspection over ultrasonic inspection?
Open 32At what level is H2 considered to be more critical in cracking?
At what level is H2 considered to be more critical in cracking?
Open 33What would the effect be if the polarity were changed from DC- to DC+ when MMA welding?
What would the effect be if the polarity were changed from DC- to DC+ when MMA welding?
Open 34Which of the following is not classed as a weld with backing?
Which of the following is not classed as a weld with backing?
Open 35Which of the following would you not need to check in a welding consumable?
Which of the following would you not need to check in a welding consumable?
Open 36Prior to production welding commencing you notice that the drawing has been revised and now includes a pipe with a wall thickness of 30 mm, WPB only covers wall thickness of 28mm,
Prior to production welding commencing you notice that the drawing has been revised and now includes a pipe with a wall thickness of 30 mm, WPB o...
Open 37Prior to commencing production welding using MAG you notice the earth clamp is in a very poor condition what would you do?
Prior to commencing production welding using MAG you notice the earth clamp is in a very poor condition what would you do?
Open 38Is it permissible to allow a welder to carry out MMA (SMAW) welding procedure test if he is not qualified?
Is it permissible to allow a welder to carry out MMA (SMAW) welding procedure test if he is not qualified?
Open 39You notice that a welder using an unapproved WPB for production welding, what course of action would you take?
You notice that a welder using an unapproved WPB for production welding, what course of action would you take?
Open 40During root welding which of the following would be the main cause of lack of penetration?
During root welding which of the following would be the main cause of lack of penetration?
Open 41You have noticed several times that a certain welder is having his welds rejected due to poor cap profile, what course of action would you follow?
You have noticed several times that a certain welder is having his welds rejected due to poor cap profile, what course of action would you follow...
Open 42During post weld heat treatment what is the sequence for the PWHT chart?
During post weld heat treatment what is the sequence for the PWHT chart?
Open 43You find out that contractor has carried the radiography as per the 10% contractual percentage required by the specification or code. The specification also insist that an addition
You find out that contractor has carried the radiography as per the 10% contractual percentage required by the specification or code. The specifi...
Open 44Weld decay is caused by the formation of a compound with carbon, the other element in this compound is
Weld decay is caused by the formation of a compound with carbon, the other element in this compound is
Open 45When examining a completed macro test the recorded hardness figures were 5HV points over the maximum permitted. What course of action would you take?
When examining a completed macro test the recorded hardness figures were 5HV points over the maximum permitted. What course of action would you t...
Open 46When using DC-VE polarity, what is the typical OCV?
When using DC-VE polarity, what is the typical OCV?
Open 47When MMA welding what will be the effect on the power source was changed from DC- to AC?
When MMA welding what will be the effect on the power source was changed from DC- to AC?
Open 48An 80mm diameter pipe, 8mm wall thickness is to be radiographed using the double wall single image technique. The source to be used is iridium. Which of the following statements is
An 80mm diameter pipe, 8mm wall thickness is to be radiographed using the double wall single image technique. The source to be used is iridium. W...
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