hold the round bars during marking
check the trueness of flat surfaces
locate the centres of round bars
check the surface roug
✅ The correct answer is option C.
Mechanical Engineering MCQs
The knocking tendency in spark ignition engines can be decreased by adding dopes like tetra ethyle lead and ethylene dibromide.
Agree
Disagree
✅ The correct answer is option A.
Non-coplaner concurrent forces are those forces which
meet at one point, but their lines of action do not lie on the same plane
do not meet at one point and their lines of action do not lie on the same plane
meet at one point and their lines of action also lie on the same plane
do not meet at one poi
✅ The correct answer is option A.
In a stress-strain diagram for mild steel, as shown in the below figure, the point A represents
elastic limit
upper yield-point
lower yield point
breaking point
✅ The correct answer is option A.
A system of masses rotating in different parallel planes is in dynamic balance if the
resultance force is equal to zero
resultant couple is equal to zero
resultant force and resultant couple are both equal to zero
resultant force is num
✅ The correct answer is option C.
Modulus of rigidity may be defined as the ratio of
linear stress to lateral strain
lateral strain to linear strain
linear stress to linear strain
shear stress to shear
✅ The correct answer is option D.
The stroke of an engine is the
volume of the cylinder
length of the connecting rod
internal diameter of the cylinder
distance between T.D.C
✅ The correct answer is option D.
Which of the following gives the correct order of increasing hot hardness of cutting tool materials?
Diamond, Carbide, High speed steel
Carbide, Diamond, High speed steel
High speed steel, Carbide, Diamond
High speed steel, Diam
✅ The correct answer is option C.
In petrol engines, the delay period is of the order of
0.001 second
0.002 second
0.003 second
0.004 second
✅ The correct answer is option B.
The absolute pressure of air at the outlet of a compressor is called
back pressure
critical pressure
discharge pressure
none of these
✅ The correct answer is option C.