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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398. The diagram factor is the ratio of the

area of the actual indicator diagram to the area of theoretical indicator diagram
actual workdone per stroke to the theoretical workdone per stroke
actual mean effective pressure to the theoretical mean effective pressure
any one of the above
✅ The correct answer is option D.

399. The engine oil level should be checked

immediately after the ignition switch is turned off
while the engine is running
a few minutes after the ignition switch is turned off
while the engine is ru
✅ The correct answer is option C.