5221. The lower critical point for all steels is
[A]. 600°C
[B]. 700°C
[C]. 723°C
[D]. 913°C
✅ 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.
5222. Willian’s line for the steam engine is a straight line relationship between the steam consumption per hour and
[A]. indicated power
[B]. brake power
[C]. efficiency
[D]. pressure of steam
✅ The correct answer is option A.
5223. In a reciprocating steam engine, the heat energy in the steam is converted into mechanical work by the to and fro motion of the piston.
[A]. Agree
[B]. Disagree
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✅ The correct answer is option A.
5224. The value of stress concentration factor depends upon
[A]. material of the part
[B]. geometry of the part
[C]. material and geometry of the part
[D]. none of these
✅ The correct answer is option C.
5225. Soderberg relation is based on __________ of the material whereas all other failure relation for dynamic loading are based on ultimate strength of the material.
[A]. elastic strength
[B]. yield strength
[C]. shear strength
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✅ The correct answer is option B.
5226. The cylinder dimensions of a compound engine may be designed on the basis of
[A]. equal power developed in each cylinder for uniform turning moment
[B]. equal initial piston loads on all pistons for obtaining same size of piston rod, connecting rod etc. for all cylinders
[C]. equal temperature drop in each cylinder for economy of steam
[D]. all of the above
✅ The correct answer is option D.
5227. A carburettor is used to supply
[A]. petrol, air and lubricating oil
[B]. air and diesel
[C]. petrol and lubricating oil
[D]. petrol and air
✅ The correct answer is option D.
5228. The constant factor in case of R10 series of preferred numbers is
[A]. 1.06
[B]. 1.12
[C]. 1.26
[D]. 1.58
✅ The correct answer is option C.
5229. The steering of a ship means
[A]. movement of a complete ship up and down in vertical plane about transverse axis
[B]. turning of a complete ship in a curve towards right or left, while it moves forward
[C]. rolling of a complete ship side-ways
[D]. none of the above
✅ The correct answer is option B.
5230. In the relation VTn = C, the value of n for carbide tools is
[A]. 0.1 to 0.2
[B]. 0.20 to 0.25
[C]. 0.25 to 0.40
[D]. 0.40 to 0.55
✅ The correct answer is option B.