ammonia
R-12
sulphur dioxide
carbon dioxide
✅ The correct answer is option C.
Mechanical Engineering MCQs
The machine screws are
slotted for a screw driver and are generally used with a nut
similar to tap bolts except that they are of small size and a variety of shapes of heads are available
used to prevent relative motion between the two parts
none of the above
✅ The correct answer is option A.
The edge of a steel plate cut by oxygen cutting will get hardened when the carbon content is
less than 0.1 percent
less than 0.3 percent
more than 0.3 percent
any where between 0.1
✅ The correct answer is option C.
An important geometrical quantity in the cutting of metals which can be used as a criterion for machinability of metals is
cutting speed
feed rate
shear angle
tool geometry
✅ The correct answer is option C.
In the below figure, PC is the connecting rod and OC is the crank making an angle θ with the line of stroke PO and rotates with uniform angular velocity at ω rad/s. The Klien’s acceleration diagram for determining the acceleration of the piston P is shown by quadrilateral C Q NO, the acceleration of the piston is zero when the crank OC and connecting rod PC are at right angles to each other.
Correct
Incorrect
✅ The correct answer is option A.
The process is adiabatic, if the value of n in the equation pvn = C, is
0
1
γ
∝
✅ The correct answer is option C.
The force per unit length is the unit of
surface tension
compressibility
capillarity
viscosity
✅ The correct answer is option A.
The relation l = (j + 2) apply only to kinematic chains in which lower pairs are used. This may be used to kinematic chains in which higher pairs are used, but each higher pair may be taken as equivalent to
one lower pair and two additional links
two lower pairs and one additional link
two lower pairs and two additional links
any one of these
✅ The correct answer is option B.
At the neutral axis of a beam
the layers are subjected to maximum bending stress
the layers are subjected to minimum bending stress
the layers are subjected to compression
the layers do not unde
✅ The correct answer is option D.
The compression ratio for Diesel engines is
3 to 6
5 to 8
15 to 20
20 to 30
✅ The correct answer is option C.