5131. The pressure at the end of compression, in diesel engines, is approximately
[A]. 10 bar
[B]. 20 bar
[C]. 25 bar
[D]. 35 bar
✅ The correct answer is option D.
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.
5132. Iron ore is, usually, found in the form of
[A]. oxides
[B]. carbonates
[C]. sulphides
[D]. all of these
✅ The correct answer is option D.
5133. The increase of cooling water temperature in petrol engine will __________ the knocking tendency.
[A]. not effect
[B]. decrease
[C]. increase
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✅ The correct answer is option C.
5134. Metal patterns are used for
[A]. small castings
[B]. large castings
[C]. complicated castings
[D]. large scale production of castings
✅ The correct answer is option D.
5135. Dye penetrant method is generally used to locate
[A]. core defects
[B]. surface defects
[C]. superficial defects
[D]. temporary defects
✅ The correct answer is option B.
5136. The diameter of Cornish boiler varies from
[A]. 0.5 to 1 m
[B]. 1 to 2 m
[C]. 1.25 to 2.5 m
[D]. 2 to 3 m
✅ The correct answer is option B.
5137. Fixed position layout is also known as
[A]. analytical layout
[B]. synthetic layout
[C]. static product layout
[D]. none of these
✅ The correct answer is option C.
5138. Workdone in a free expansion process is
[A]. zero
[B]. minimum
[C]. maximum
[D]. positive
✅ The correct answer is option A.
5139. In orthogonal cutting system, the maximum chip thickness occurs at the middle.
[A]. Correct
[B]. Incorrect
null
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✅ The correct answer is option A.
5140. In a centrifugal casting method
[A]. core is made of sand
[B]. core is made of ferrous metal
[C]. core is made of non-ferrous metal
[D]. no core is used
✅ The correct answer is option D.