porosity of the metal is largely eliminated
grain structure of the metal is refined
mechanical properties are improved due to refinement of grains
all of the above
✅ The correct answer is option D.
Engineering MCQs
Guest’s theory is used for
brittle materials
ductile materials
elastic materials
plastic materials
✅ The correct answer is option B.
A grinding wheel is said to be of __________ if the abrasive grains can be easily dislodged.
soft grade
medium grade
hard grade
✅ The correct answer is option A.
The surface finish factor for a mirror polished material is
0.45
0.65
0.85
1
✅ The correct answer is option D.
The danger of breakage and vibration is maximum
below the critical speed
near the critical speed
above the critical speed
none of these
✅ The correct answer is option B.
When a closely-coiled helical spring is subjected to an axial load, it is said to be under
bending
shear
torsion
crushing
✅ The correct answer is option C.
Ceramic tools are fixed to tool body by
soldering
brazing
welding
clamping
✅ The correct answer is option B.
For a bevel gear having the pitch angle θ , the ratio of formative number of teeth (TE) to actual number of teeth (T) is
1/sin θ
1/cos θ
1/tan θ
sin θ cos θ
✅ The correct answer is option B.
The friction present between the steam and the nozzle surfaces reduces the heat drop by
10 to 15 percent
15 to 25 percent
25 to 40 percent
40 to 60 percent
✅ The correct answer is option A.