3701. The addition of magnesium to cast iron increases its
hardness
ductility and strength in tension
corrosion resistance
creep strength
✅ 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.
3702. Brittle materials when subjected to tensile loads, snap off without giving any sensible elongation.
Yes
No
✅ The correct answer is option A.
3703. Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its vertex and parallel to the base, is __________ than that passing through its C.G. and parallel to the base.
nine times
six times
four times
two times
✅ The correct answer is option A.
3704. Pearlite is a combination of 87% ferrite and 13% cementite.
Yes
No
✅ The correct answer is option A.
3705. Vanadium when added to steel
increases tensile strength
decreases tensile strength
raises critical temperature
Sowers critical temper
✅ The correct answer is option A.
3706. The Rankine’s constant for a mild steel column with both ends hinged is
1/750
1/1600
Jan-00
Jan-00
✅ The correct answer is option C.
3707. The critical depth meter is used to measure
velocity of flow in an open channel
depth of flow in an open channel
hydraulic jump
depth of channel
✅ The correct answer is option C.
3708. The radius of a friction circle for a shaft rotating inside a bearing is (where r = Radius of shaft, and tan φ = Coefficient of friction between the shaft and bearing)
r sin φ
r cos φ
r tan φ
✅ The correct answer is option A.
3709. The frictional torque transmitted in a flat collar bearing, considering uniform pressure, is (where r1 and r2 = External and internal radii of collar respectively)
μ W (r1 + r2)
μ W (r1 + r2)
✅ The correct answer is option D.
3710. The ratio of Nusselt number and the product of Reynold’s number and Prandtl number is equal to
Stanton number
Biot number
Peclet number
Grashoff number
✅ The correct answer is option A.