less than 2000
between 2000 and 2800
more than 2800
none of these
✅ The correct answer is option C.
Mechanical Engineering MCQs
When the shaft rotates in anticlockwise direction at slow speed in a bearing, it will
have contact at the bottom most of the bearing
move towards right of the bearing making the metal to metal contact
move towards right of the bearing making no metal to metal contact
move towards left of t
✅ The correct answer is option D.
A feed gear box for a screw cutting lathe is designed on the basis of
geometric progression
arithmetic progression
harmonic progression
none of these
✅ The correct answer is option A.
In skew bevel gearing, the axes of shafts are
intersecting and the teeth are curved
non-intersecting and non-parallel and the teeth are curved
non-intersecting and non-parallel and the teeth are straight
none of the above
✅ The correct answer is option C.
A long delay period in compression ignition engines gives a more rapid rise in pressure which causes knocking.
Yes
No
✅ The correct answer is option A.
If a shaft made from ductile material is subjected to combined bending and twisting moment, calculations based on which one of the following failure theories will give the most conservative value?
Maximum principal stress theory
Maximum shear stress theory
Maximum strain energy theory
Maximum distortion ene
✅ The correct answer is option A.
The maximum hydraulic efficiency of an impulse turbine is (where φ = Angle of blade tip at outlet)
✅ The correct answer is option A.
The temperature point at which the change ends on heating the steel is called
lower critical point
upper critical point
point of recalescence
point of decalescence
✅ The correct answer is option B.
The ends of the leaves of a semi-elliptical leaf spring are made triangular in order to
obtain variable moment of inertia (I) in each leaf
permit each leaf to act as a overhanging beam
have variable bending moment (M) in each leaf
make M/I constant thro
✅ The correct answer is option D.
Which of the following statement is correct as regard to the difference between a machine and a structure?
The parts of a machine move relative to one another, whereas the members of a structure do not move relative to one another
The links of a machine may transmit both power and motion, whereas the members of a structure transmit forces only
A machine transforms the available energy into some useful work, whereas in a structure no energy is transformed into useful work
all of the above
✅ The correct answer is option D.