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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1541. The function of a proportioning control valve (PCV) in a brake system is to

ensure that equal pressure is supplied to the front and rear brakes throughout every braking operation
reduce the brake fluid pressure when the brakes approach their lockup point
cause less brake fluid pressure to act on the front brakes than on the rear brakes when the fluid pressure exceeds a predetermined level
cause less brake fluid
✅ The correct answer is option D.

1548. For the same maximum pressure and temperature

Diesel cycle is more efficient than Otto cycle
Otto cycle is more efficient than Diesel cycle
both Otto cycle and Diesel cycle are equally efficient
none of the above
✅ The correct answer is option A.