Correct
Incorrect
✅ The correct answer is option B.
Mechanical Engineering MCQs
In case ofsensible cooling of air, the coil efficiency is given by
B.P.F. – 1
1 – B.P.F.
1 + B.P.F.
✅ The correct answer is option B.
The shear velocity is the velocity of
tool relative to the workpiece
chip relative to the tool
tool along the tool face
none of these
✅ The correct answer is option D.
When a low carbon steel is heated upto upper critical temperature
there is no change in grain size
the average grain size is a minimum
the grain size increases very rapidly
the grain size first i
✅ The correct answer is option B.
The iron ore mostly used for the production of pig iron is
magnetite
haematite
limonite
siderite
✅ The correct answer is option B.
When the shear angle is small
path of shear is short and chip is thin
path of shear is large and chip is thick
path of shear is short and chip is thick
path of shear is large
✅ The correct answer is option B.
If the number of pulleys in a system is equal to its velocity ratio, then it is a __________ system of pulleys
first
second
third
✅ The correct answer is option B.
The vacuum pressure can be measured with the help of a piezometer tube.
TRUE
FALSE
✅ The correct answer is option B.