proportional limit, elastic limit, yielding, failure
elastic limit, proportional limit, yielding, failure
yielding, proportional limit, elastic limit, failure
none of the above
✅ The correct answer is option A.
Mechanical Engineering MCQs
The potential energy stored by a spring in compression, is called strain energy.
Yes
No
✅ The correct answer is option A.
The secondary unbalanced force is __________ the primary unbalanced force.
one-half
two-third
n times
1/n times
✅ The correct answer is option D.
In the relation VTn = C, the value of n for high speed steel tools varies from 0.25 to 0.40.
Agree
Disagree
✅ The correct answer is option B.
Coefficient of discharge Cd is equal to (where Cc = Coefficient of contraction, Cv = Coefficient of velocity, and Cr = Coefficient of resistance)
Cc x Cv
Cc x Cr
Cv x Cr
Cc/Cr
✅ The correct answer is option A.
De-Laval turbines are mostly used
where low speeds are required
for small power purposes and low speeds
for large power purposes
for small power purpos
✅ The correct answer is option D.
In a vapour compression refrigeration system, a throttle valve is used in place of an expander because
it considerably reduces mass of the system
it improves the C.O.P., as the condenser is small
the positive work in isentropic expansion of liquid is very small
it leads to significan
✅ The correct answer is option C.
The Euler’s equation for the motion of liquids is based upon the assumption that
the fluid is non – viscous, homogeneous and incompressible
the velocity of flow is uniform over the section
the flow is continuous, steady and along the stream line
all of the above
✅ The correct answer is option D.
The abrasive recommended for grinding materials of low tensile strength is
silicon carbide
aluminium oxide
sand stone
diamond
✅ The correct answer is option A.
The unbalanced primary forces in a reciprocating engine are
balanced completely
balanced partially
balanced by secondary forces
not balanced
✅ The correct answer is option B.