4961. The fire tubes in a Scotch marine boiler are
horizontal
vertical
inclined
✅ 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.
4962. In up milling, the thickness of chip is
minimum at the beginning of the cut and maximum at the end of the cut
maximum at the beginning of the cut and minimum at the end of the cut
uniform throughout the cut
none of these
✅ The correct answer is option A.
4963. The acceleration of the particle moving with simple harmonic motion is inversely proportional to the displacement of the particle from the mean position.
Yes
No
✅ The correct answer is option B.
4964. In a hydrodynamic lubricated bearing
there is a thick film of lubricant between the journal and the bearing
there is a thin film of lubricant between the journal and the bearing
there is no lubricant between the journal and the bearing
the lubricant is forced between the journal and the bearing, by external pressure
✅ The correct answer is option A.
4965. A resultant force is a single force which produces the same effect as produced by all the given forces acting on a body.
TRUE
FALSE
✅ The correct answer is option A.
4966. The constant pressure, constant volume and constant pvn processes are regarded as irreversible process.
TRUE
FALSE
✅ The correct answer is option A.
4967. The quenching of steel from the upper critical point results in a fine grained structure.
Agree
Disagree
✅ The correct answer is option A.
4968. Direct expenses include
factory expenses
selling expenses
administrative expenses
none of these
✅ The correct answer is option D.
4970. The overall efficiency of a reaction turbine is the ratio of
power produced by the turbine to the energy actually supplied by the turbine
actual work available at the turbine to the energy imparted to the wheel
workdone on the wheel to the energy (or head of water) actually supplied to the turbine
none of the above
✅ The correct answer is option A.