3801. At the nodal point in a shaft, the amplitude for torsional vibration will be
minimum
maximum
zero
infinity
✅ 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.
3802. When the speed of belt increases,
the coefficient of friction between the belt and pulley increases
the coefficient of friction between the belt and pulley decreases
the power transmitted will decrease
the power transmitted
✅ The correct answer is option C.
3803. The ratio of heat actually used in producing the steam to the heat liberated in the furnace is known as equivalent evaporation from and at 100° C.
Correct
Incorrect
✅ The correct answer is option B.
3804. The unit of stress in S.I. units is
N/mm2
kN/mm2
N/m2
any one of these
✅ The correct answer is option D.
3805. Benson boiler is a __________ water tube steam boiler using forced circulation of water.
low pressure
high pressure
✅ The correct answer is option B.
3806. Wein’s law states that the wave length corresponding to __________ is proportional to the absolute temperature.
minimum energy
maximum energy
✅ The correct answer is option B.
3807. The percentage carbon content in wrought iron is about
0.02
0.1
2
0.4
✅ The correct answer is option A.
3808. The heat absorbed during a polytropic process is
x Workdone
all of these
✅ The correct answer is option D.
3809. A pressure gauge on the discharge side of a refrigerant compressor reads too high. The reasons will be
lack of cooling water
water temperature being high
dirty condenser surface
all of these
✅ The correct answer is option D.
3810. The cutting tools are made from
nickel steel
chrome steel
nickel-chrome steel
high speed steel
✅ The correct answer is option D.