porosity of the metal is largely eliminated
grain structure of the metal is refined
mechanical properties are improved due of refinement of grains
all of the above
✅ The correct answer is option D.
Mechanical Engineering MCQs
Lubrication in I.C. engines dissipates the heat generated from the moving parts due to friction.
TRUE
FALSE
✅ The correct answer is option A.
The springs in cars are used to store strain energy.
Correct
Incorrect
✅ The correct answer is option B.
Auto frettage is the method of
joining thick cylinders
calculating stresses in thick cylinders
prestressing thick cylinders
increasing the life of
✅ The correct answer is option C.
A jig is defined as a device which
holds and locates a workpiece and guides and controls one or more cutting tools
holds and locates a workpiece during an inspection or for a manufacturing operation
is used to check the accuracy of workpiece
all of the above
✅ The correct answer is option A.
The enlarging of an existing circular hole with a rotating single point tool is called
boring
drilling
reaming
internal turning
✅ The correct answer is option A.
The fluids used in electrolux refrigerator are
water and hydrogen
ammonia and hydrogen
ammonia, water and hydrogen
none of these
✅ The correct answer is option C.
Aluminium is the best material for making patterns because it is
light in weight
easy to work
corrosion resistant
all of these
✅ The correct answer is option D.
The alloy, mainly used for corrosion resistance in stainless steels is
silicon
manganese
carbon
chromium
✅ The correct answer is option D.