3421. When the lift is moving upwards with some acceleration, the pressure exerted by a man is __________ proportional to its acceleration.
directly
inversely
✅ 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.
3422. In metal cutting, use of low feeds and high cutting speeds is desired when the objective is
high metal removal rate
dry machining
use of soft cutting tool
surface finish
✅ The correct answer is option D.
3423. The atomic mass of nitrogen is __________ oxygen.
equal to
less than
more than
✅ The correct answer is option B.
3424. The hoop stress in a thin cylindrical shell is
longitudinal stress
compressive stress
radial stress
circumferential tensil
✅ The correct answer is option D.
3425. Stirling cycle consists of
two constant volume and two isentropic processes
two constant volume and two isothermal processes
two constant pressure and two isothermal processes
one constant volume, o
✅ The correct answer is option B.
3426. Laminar flow __________ place at very low velocities.
takes
does not take
✅ The correct answer is option A.
3427. A fluid whose viscosity does not change with the rate of deformation or shear strain is known as
real fluid
ideal fluid
newtonian fluid
non-newtonian fluid
✅ The correct answer is option C.
3428. Which of the following is required for a steam condensing plant ?
Condenser
Condensate pump
Air extraction pump
all of these
✅ The correct answer is option D.
3429. A jet of water discharging from a 40 mm diameter orifice has a diameter of 32 mm at its vena contracta. The coefficient of contraction is
0.46
0.64
0.78
0.87
✅ The correct answer is option B.
3430. The buckling load will be maximum for a column, if
one end of the column is clamped and the other end is free
both ends of the column are clamped
both ends of the column are hinged
one end of the column
✅ The correct answer is option B.