4241. The moment of inertia of a sphere of mass m and radius r, about an axis tangential to it, is
2mr2/3
2mr2/5
7mr2/3
7mr2/5
✅ The correct answer is option D.
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.
4242. The depth of water in a channel corresponding to the minimum specific energy is known as critical depth.
Agree
Disagree
✅ The correct answer is option A.
4243. Glazing in grinding wheels takes place when the
wheel is too hard or wheel revolves at a very high speed
wheel is too soft or wheel revolves at a very slow speed
wheel is too hard and wheel revolves at very slow speed
wheel is too soft and
✅ The correct answer is option A.
4244. In a steam engine, the distance by which the inner edge of the D-slide valve overlaps the steam port is called lead.
Agree
Disagree
✅ The correct answer is option B.
4245. Carnot cycle consists of
two constant volume and two isentropic processes
two isothermal and two isentropic processes
two constant pressure and two isentropic processes
one constant volume, o
✅ The correct answer is option B.
4246. Moisture should be removed from refrigerants to avoid
freezing at the expansion valve
restriction to refrigerant flow
corrosion of steel plates
all of these
✅ The correct answer is option D.
4247. In a psychrometric chart, dew point temperature lines are horizontal and non-uniformly spaced.
Correct
Incorrect
✅ The correct answer is option A.
4248. According to Regnault’s law, the specific heat at constant pressure (cp) and specific heat at constant volume (cv) __________ with the change in pressure and temperature of the gas.
change
do not change
✅ The correct answer is option B.
4249. The starting system includes
a battery, a starter, and an ignition switch
a battery, a distributor, and an ignition switch
a battery, a starter, and a distributor
a distributor, a start
✅ The correct answer is option A.
4250. The thermal stress __________ upon the cross-sectional area of the bar.
depends
does not depend
✅ The correct answer is option B.