4021. The strain energy stored in a body due to shear stress, is (where τ = Shear stress, C = Shear modulus, and V = Volume of the body)
✅ The correct answer is option C.
Mechanical Engineering
Prepare with the best Mechanical Engineering MCQs with answers and explanations for exams, interviews, and job tests. Our collection covers core topics such as engineering mechanics, thermodynamics, strength of materials, theory of machines, fluid mechanics, heat transfer, manufacturing processes, machine design, and power plant engineering. These Mechanical Engineering multiple-choice questions are designed for students, fresh graduates, and professionals preparing for NTS, PPSC, FPSC, PEC exams, GATE, university entry tests, and recruitment assessments. Strengthen your technical knowledge and problem-solving ability with our updated and comprehensive Mechanical Engineering MCQs.
4022. The area under the temperature-entropy curve (i. e. T – s curve) of any thermodynamic process represents the workdone during the process.
Agree
Disagree
✅ The correct answer is option B.
4023. A rectangular beam of length l supported at its two ends carries a central point load W. The maximum deflection occurs
at the ends
at l/3 from both ends
at the centre
none of these
✅ The correct answer is option C.
4024. When the flow in an open channel is gradually varied, the flow is said to be
steady uniform flow
steady non-uniform flow
unsteady uniform flow
unsteady non-uniform f
✅ The correct answer is option B.
4025. The cap 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 B.
4026. A combination of kinematic pairs, joined in such a way that the relative motion between the links is completely constrained, is called a
structure
mechanism
kinematic chain
inversion
✅ The correct answer is option C.
4027. Which one of the following loading is considered for the design of axles?
Bending moment only
Twisting moment only
Combined bending moment and twisting moments
Combined action of ben
✅ The correct answer is option A.
4028. Which one of the following is the effect of blade shape on performance of a centrifugal compressor ?
Backward curved blades has poor efficiency
Backward curved blades lead to stable performance
Forward curved blades has higher efficiency
Forward curved blades
✅ The correct answer is option D.
4029. The water tube boilers produce steam at a __________ pressure than that of fire tube boilers.
lower
higher
✅ The correct answer is option B.