Mechanical Engineering MCQ with Answers
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Lamellar tearing is a problem in steels which is always associated with?
Lamellar tearing is a problem in steels which is always associated with?
Open 266Sensitization is a term applied to the formation of which intermetallic compound at the grain boundaries in the HAZ of austenitic steels?
Sensitization is a term applied to the formation of which intermetallic compound at the grain boundaries in the HAZ of austenitic steels?
Open 267Which of the following processes is most prone to solidification cracking?
Which of the following processes is most prone to solidification cracking?
Open 268The temperature gradient of steels subjected to post-heat treatment stress relief cycles must be carefully controlled at all the temperatures above 300°C in order to:
The temperature gradient of steels subjected to post-heat treatment stress relief cycles must be carefully controlled at all the temperatures abo...
Open 269For the structure termed martensitic to form in a C-Mn steel it must first be heated to?
For the structure termed martensitic to form in a C-Mn steel it must first be heated to?
Open 270Why is it sometimes necessary to preheat the base material before welding?
Why is it sometimes necessary to preheat the base material before welding?
Open 271Which 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 272Which BS EN standard is used for welding symbols on drawings?
Which BS EN standard is used for welding symbols on drawings?
Open 273What does the term WPQR mean?
What does the term WPQR mean?
Open 274The 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 275Who should have access to WPQRS?
Who should have access to WPQRS?
Open 276During 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 277The 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 278What 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 279Why is the OCV capped at this voltage setting?
Why is the OCV capped at this voltage setting?
Open 280What 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 281Why 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 282Why 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 283To 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 284What 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 285Who should select the specific welds for NDT, to cover the 10% contractual percentage required by the specification code
Who should select the specific welds for NDT, to cover the 10% contractual percentage required by the specification code
Open 286Who determines what the correct preparation (root gap, root face, included angle) should be?
Who determines what the correct preparation (root gap, root face, included angle) should be?
Open 287In a transverse weld tensile test, if the break was in the weld material, the sample would be
In a transverse weld tensile test, if the break was in the weld material, the sample would be
Open 288In a welder qualification testing of 45 mm plates, why are side bends used instead of root and face bends
In a welder qualification testing of 45 mm plates, why are side bends used instead of root and face bends
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