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.

📘 Automobile Engineering MCQs
📘 Compressors, Gas Dynamics and Gas Turbines MCQs
📘 Engineering Materials MCQs
📘 Engineering Mechanics MCQs
📘 Heat Transfer, Refrigeration and Air Conditioning MCQs
📘 Hydraulic Machines MCQs
📘 Hydraulics and Fluid Mechanics MCQs
📘 IC Engines and Nuclear Power Plants MCQs
📘 Industrial Engineering and Production Management MCQs
📘 Machine Design MCQs
📘 Production Engineering MCQs
📘 Steam Boilers and Engines MCQs
📘 Steam Nozzles and Turbines MCQs
📘 Strength of Materials MCQs
📘 Theory of machines MCQs
📘 Thermodynamics MCQs
📘 topics MCQs
📘 Workshop Technology MCQs

1021. The efficiency of a boiler is defined as

ratio of heat actually used in producing steam to the heat liberated in the furnace
ratio of the mass of steam produced to the mass of total water supplied in a given time
ratio of the heat liberated in the furnace to the heat actually Used in producing steam
none of the above
✅ The correct answer is option A.