2951. When a body is subjected to a direct tensile stress (σx) in one plane accompanied by a simple shear stress (τxy ), the maximum normal stress is
✅ The correct answer is option A.
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.
2952. The maximum shear stress developed in a beam of circular section is __________ the average shear stress.
equal to
4/3 times
1.5 times
twice
✅ The correct answer is option B.
2953. The two elements of a pair are said to form a higher pair, when they
have a surface contact when in motion
have a line or point contact when in motion
are kept in contact by the action of external forces, when in motion
permit relative motion
✅ The correct answer is option B.
2954. In a watch, the spring is used to store strain energy. This energy is released
to stop the watch
to run the watch
to change the time
all of these
✅ The correct answer is option B.
2956. A flow is called hyper-sonic, if the Mach number is
less than unity
unity
between 1 and 6
none of these
✅ The correct answer is option D.
2957. Select the correct statement
Weber’s number is the ratio of inertia force to elastic force.
Weber’s number is the ratio of gravity force to surface tension force.
Weber’s number is the ratio of viscous force to pressure force.
Weber’s number is the
✅ The correct answer is option D.
2958. The area under the temperature-entropy curve (T – s curve) of any thermodynamic process represents
heat absorbed
heat rejected
either (a) or (b)
none of these
✅ The correct answer is option C.
2959. A pitot tube is used to measure the
velocity of flow at the required point in a pipe
pressure difference between two points in a pipe
total pressure of liquid flowing in a pipe
discharge through a pi
✅ The correct answer is option A.
2960. Crater wear leads to
increase in cutting temperature
weakening of tool
friction and cutting forces
all of these
✅ The correct answer is option D.