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.

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312. The auto ignition in a spark ignition engine means

automatic ignition of the charge at the end of compression
ignition induced by the passage of a spark
ignition of the charge before the passage of flame front
ignition induced to su
✅ The correct answer is option C.

313. The fatigue stress concentration factor is defined as

the ratio of endurance limit with stress concentration to the endurance limit without stress concentration
the ratio of endurance limit without stress concentration to the endurance limit with stress concentration
the product of the endurance limits with and without stress concentration
all of the above
✅ The correct answer is option B.

316. Creep in belt is due to

material of the belt
material of the pulley
uneven extensions and contractions due to varying tension
all of the above
✅ The correct answer is option C.