Mechanical Engineering MCQ with Answers
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Who or what determines the necessity of a post weld heat treatment?
Who or what determines the necessity of a post weld heat treatment?
Open 122On inspecting a completed 150mm OD pipe weld, some small smooth, shallow areas of undercut have been found <0.25mm deep. The welder says he can quickly put this right by depositing
On inspecting a completed 150mm OD pipe weld, some small smooth, shallow areas of undercut have been found <0.25mm deep. The welder says he can q...
Open 123Before welding components, the welders' qualifications need to be checked. Do those welders that are going to weld temporary handling attachments also need to have taken performanc
Before welding components, the welders' qualifications need to be checked. Do those welders that are going to weld temporary handling attachments...
Open 124Before welding and during welding in the cleaning stage, which statements from below would you consider are correct?
Before welding and during welding in the cleaning stage, which statements from below would you consider are correct?
Open 125Before welding components, the welders' qualifications need to be checked. Does a tack welder also need to do a performance qualification test?
Before welding components, the welders' qualifications need to be checked. Does a tack welder also need to do a performance qualification test?
Open 126HIC is usually delayed because
HIC is usually delayed because
Open 127A number of changes and deviations have happened during the fabrication of a component. How will they be indicated to everyone for future reference?
A number of changes and deviations have happened during the fabrication of a component. How will they be indicated to everyone for future referen...
Open 128Of the following heat treatments, which will be the most effective in reducing the chances of HIC
Of the following heat treatments, which will be the most effective in reducing the chances of HIC
Open 129What is a hot pass?
What is a hot pass?
Open 130During welding you observe that the welder is weaving excessively. Which mechanical property is most likely to deteriorate because of this?
During welding you observe that the welder is weaving excessively. Which mechanical property is most likely to deteriorate because of this?
Open 131What is a duty cycle?
What is a duty cycle?
Open 132Generally in brazing the melting point of the filler metal is above ----- but always below the melting temperature of the parent material
Generally in brazing the melting point of the filler metal is above ----- but always below the melting temperature of the parent material
Open 133To prevent excess weld metal in SMAW/SAW the polarity used should be
To prevent excess weld metal in SMAW/SAW the polarity used should be
Open 134By which of the following welding processes can autogenous welding not be achieved?
By which of the following welding processes can autogenous welding not be achieved?
Open 135Which statement from below is not true concerning fracture test?
Which statement from below is not true concerning fracture test?
Open 136GTAW water-cooled torches should be used when the amperage exceeds
GTAW water-cooled torches should be used when the amperage exceeds
Open 137Bend tests are used for which of the following?
Bend tests are used for which of the following?
Open 138In the MMA process, the effect of polarity on welding may be described as
In the MMA process, the effect of polarity on welding may be described as
Open 139The test method for assessing resistance to brittle fracture, by measuring the energy to initiate and propagate a crack from a sharp notch in a standard-sized specimen is called
The test method for assessing resistance to brittle fracture, by measuring the energy to initiate and propagate a crack from a sharp notch in a s...
Open 140The 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 141For 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 142Why is it sometimes necessary to preheat the base material before welding?
Why is it sometimes necessary to preheat the base material before welding?
Open 143Which 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 144Which BS EN standard is used for welding symbols on drawings?
Which BS EN standard is used for welding symbols on drawings?
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