721. A steel containing upto 0.15% carbon is known as
mild steel
dead mild steel
medium carbon steel
high carbon steel
✅ 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.
722. The purpose of heat treatment is to
relieve the stresses set up in the material after hot or cold working
modify the structure of the material
change grain size
any one of these
✅ The correct answer is option D.
723. A shaft is designed on the basis of rigidity and stiffness.
Correct
Incorrect
✅ The correct answer is option A.
724. The bending moment of a cantilever beam of length l and carrying a uniformly distributed load of w per unit length is __________ at the free end.
zero
wl/4
wl/2
wl
✅ The correct answer is option A.
725. For turning small taper on long workpiece, the suitable method is
by a form tool
by setting over the tail stock
by a taper turning attachment
by swivelling the comp
✅ The correct answer is option B.
726. In a V-belt drive, the belt makes contact at the bottom of the groove of the pulley.
Agree
Disagree
✅ The correct answer is option B.
727. In cross compounding, the cylinders are arranged
side by side and each cylinder has common piston, connecting rod and crank
side by side and each cylinder has separate piston, connecting rod and crank
at 90° and each cylinder has common piston, connecting rod and crank
at 90° and each cylind
✅ The correct answer is option B.
728. A system in dynamic balance implies that
the system is critically damped
there is no critical speed in the system
the system is also statically balanced
there will absolutely
✅ The correct answer is option C.
729. Generally PERT is preferred over CPM for the purpose of project evaluation.
Yes
No
✅ The correct answer is option A.
730. The height of a water column equivalent to a pressure of 0.15 MPa is
15.3 m
25.3 m
35.3 m
45.3 m
✅ The correct answer is option A.