Engineering MCQs

If percentage reduction in area of a certain specimen made of material ‘A’ under tensile test is 60% and the percentage reduction in area of a specimen with same dimensions made of material ‘B’ is 40%, then

by
the material A is more ductile than material B
the material B is more ductile than material A
the ductility of material A and B is equal
the material A is brit
✅ The correct answer is option A.

Blow off cock in a boiler is used to

by
control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required
empty the boiler when required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler
put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit
increase the temperatu
✅ The correct answer is option B.

Mohr’s circle is used to determine the stresses on an oblique section of a body subjected to

by
direct tensile stress in one plane accompanied by a shear stress
direct tensile stress in two mutually perpendicular directions
direct tensile stress in two mutually perpendicular directions accompanied by a simple shear stress
all of the above
✅ The correct answer is option D.