3331. A machine which is not capable of doing any work in the reversed direction, after the effort is removed, is called a reversible machine.
TRUE
FALSE
✅ The correct answer is option B.
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.
3332. The force, by which the body is attracted, towards the centre of the earth, is called
impulsive force
mass
weight
momentum
✅ The correct answer is option C.
3333. The section modulus of a circular section about an axis through its C.G., is
πd2/4
πd2/16
πd3/16
πd3/32
✅ The correct answer is option D.
3334. According to Newton’s law of cooling, the heat transfer from a hot body to a cold body is
directly proportional to the surface area
directly proportional to the difference of temperatures between the two bodies
either (a) or (b)
both (a) and (b)
✅ The correct answer is option D.
3335. With the increase of battery temperature, the specific gravity of electrolyte
increases
decreases
reamains the same
none of these
✅ The correct answer is option B.
3337. An ideal machine is one whose efficiency is
between 60 and 70 %
between 70 and 80%
between 80 and 90%
100%
✅ The correct answer is option D.
3338. A beam of T-section is subjected to a shear force of F. The maximum shear force will occur at the
top of the section
bottom of the section
neutral axis of the section
junction of web and fl
✅ The correct answer is option C.
3339. In a velocity compounded impulse turbine, when steam flows through the second row of moving blades,
velocity increases
velocity decreases
velocity remains constant
pressure remains const
✅ The correct answer is option B.
3340. Jigs are used
for holding and guiding the tool in drilling, reaming or tapping operations
for holding the work in milling, grinding, planing or turning operations
to check the accuracy of workpiece
none of the above
✅ The correct answer is option A.