711. When a gas is heated at constant volume
its temperature will increase
its pressure will increase
both temperature and pressure will increase
neither temperature no
✅ 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.
712. The expansion joint is mostly used for pipes which carry steam at __________ pressures.
low
high
✅ The correct answer is option B.
713. Halsey plan of wage incentive
is not applied to all level of workers
is applied to all level of workers
does not guarantee minimum wage
is based upon efficien
✅ The correct answer is option B.
714. A steel with 0.8% carbon is known as
eutectoid steel
hyper-eutectoid steel
hypo-eutectiod steel
none of these
✅ The correct answer is option A.
715. The shear stress in a beam varies from zero at the outer fibres to a maximum at the neutral surface.
Yes
No
✅ The correct answer is option A.
716. The relative coefficient of performance is equal to
Actual C.O.P. x Theoretical C.O.P.
none of these
✅ The correct answer is option B.
717. The starter motor is driven by
chain drive
gear drive
flat belt drive
V-belt drive
✅ The correct answer is option B.
718. The tyre rotation is generally done at
1000 km
4000 km
6000 km
10000 km
✅ The correct answer is option D.
719. The displacement of a flat-faced follower when it has contact with the flank of a circular arc cam, is given by (where R = Radius of flank, r1 = Minimum radius of the cam, and θ = Angle turned through by the cam)
R(1 – cos θ)
(R – r1)(1 – cos θ)
R(1 – sin θ)
(R – r1)(1 – sin θ)
✅ The correct answer is option B.
720. The radius of gyration is the distance where the whole mass (or area) of a body is assumed to be concentrated.
Correct
Incorrect
✅ The correct answer is option A.