250 + Mechanical Engineering Viva Questions

250 + Mechanical Engineering Viva Questions


  • What is thermodynamics and explain the laws of thermodynamics?
  • Explain the working principle of a reciprocating engine.
  • Explain the difference between isotropic and anisotropic materials.
  • What is the purpose of a heat exchanger and how does it work?
  • What is stress and strain and how do they relate to each other?
  • Explain the difference between tensile and compressive stress.
  • What is the difference between a hydraulic and a pneumatic system?
  • Explain the working principle of a gas turbine.
  • What is the difference between a centrifugal pump and a positive displacement pump?
  • What is a gearbox and how does it work?
  • What is the purpose of a boiler in a thermal power plant?
  • What is the difference between plastic deformation and elastic deformation?
  • Explain the principle of a solar thermal power plant.
  • What is the difference between a heat engine and a refrigerator?
  • What is a materials science and what are its applications in mechanical engineering?
  • Explain the different types of welding processes.
  • What is finite element analysis and how is it used in mechanical engineering?
  • Explain the difference between mechanical and metallurgical engineering.
  • What is the difference between a belt drive and a chain drive?
  • What is a mechanical seal and how does it work?
  • What is the purpose of a pressure vessel and how is it designed?
  • Explain the working principle of a steam turbine.
  • What is the difference between a cantilever and a simply supported beam?
  • What is the difference between a bearing and a bush?
  • What is the difference between ductile and brittle failure?
  • What is the purpose of a hydraulic cylinder and how does it work?
  • What is the difference between a centrifugal compressor and a positive displacement compressor?
  • What is the difference between a propeller and a fan?
  • What is a mechanical joint and what are the different types?
  • What is the purpose of a heat sink and how does it work?
  • What is the difference between a cast iron and a forged steel?
  • What is the difference between a hot and cold forging process?
  • What is the difference between a ball screw and a lead screw?
  • What is the difference between a centrifugal blower and an axial flow fan?
  • What is the purpose of a shock absorber and how does it work?
  • What is the difference between an open and closed cycle gas turbine?
  • What is the difference between a vane pump and a gear pump?
  • What is the difference between a pneumatic actuator and an electric actuator?
  • What is the difference between a ball valve and a globe valve?
  • What is the difference between a hydraulic motor and a hydraulic pump?
  • What is the purpose of a mechanical governor in an engine?
  • What is the difference between a hydraulic accumulator and a hydraulic intensifier?
  • What is the difference between a cam and a crank?
  • What is the purpose of a mechanical seal in a pump?
  • What is the difference between a rotary compressor and a reciprocating compressor?
  • What is the difference between a belt and chain drive transmission?
  • What is the difference between a torsion bar and a leaf spring suspension system?
  • What is the difference between a centrifugal fan and a backward curved fan?
  • What is the purpose of a mechanical amplifier and how does it work?
  • What is the difference between a mechanical energy storage system and an electrical energy storage system?
  • What is the difference between a hydraulic power pack and a hydraulic system?
  • What is the purpose of a mechanical balance and how is it achieved?
  • What is the difference between a hydraulic press and a mechanical press?
  • What is the difference between a hydraulic ram and a hydraulic pump?
  • What is the difference between a hydraulic hose and a hydraulic tube?
  • What is the difference between a hydraulic pump and a hydraulic motor?
  • What is the difference between a hydraulic cylinder and a hydraulic actuator?
  • What is the difference between a hydraulic valve and an electrical valve?
  • What is the difference between a hydraulic fluid and a lubricating oil?
  • What is the difference between a hydraulic system and a pneumatic system?
  • What is the difference between a hydraulic circuit and a pneumatic circuit?
  • What is the difference between a hydraulic actuator and a pneumatic actuator?
  • What is the difference between a hydraulic pump and a pneumatic pump?
  • What is the difference between a hydraulic valve and a pneumatic valve?
  • What is the difference between a hydraulic system and a mechanical?
  • What is the purpose of a flywheel in a mechanical system?
  • Explain the working principle of a diesel engine.
  • What is the difference between a metal and a polymer?
  • Explain the concept of stress-strain curve and its significance in mechanical engineering.
  • What is the purpose of a governor in a reciprocating engine?
  • What is the difference between a metal and a composite material?
  • What is the difference between a metal casting and a metal forging process?
  • What is the purpose of a crankshaft in an engine?
  • What is the difference between a mechanical transmission and a hydraulic transmission?
  • What is the difference between a centrifugal force and a centripetal force?
  • What is the purpose of a belt drive transmission?
  • What is the difference between a mechanical linkage and a hydraulic linkage?
  • What is the purpose of a mechanical spring?
  • What is the difference between a tensile test and a compression test?
  • What is the difference between a metal cutting tool and a metal forming tool?
  • What is the difference between a casting defect and a forging defect?
  • What is the difference between a mechanical power transmission system and an electrical power transmission system?
  • What is the purpose of a mechanical governor in a diesel engine?
  • What is the difference between a mechanical vibration and a hydraulic vibration?
  • What is the difference between a mechanical shock and a hydraulic shock?
  • What is the difference between a mechanical stress and a hydraulic stress?
  • What is the difference between a mechanical spring and a hydraulic spring?
  • What is the difference between a mechanical bearing and a hydraulic bearing?
  • What is the difference between a mechanical joint and a hydraulic joint?
  • What is the difference between a mechanical seal and a hydraulic seal?
  • What is the difference between a mechanical power plant and a hydraulic power plant?
  • What is the difference between a mechanical coupling and a hydraulic coupling?
  • What is the difference between a mechanical actuator and a hydraulic actuator?
  • What is the difference between a mechanical vibration damper and a hydraulic vibration damper?
  • What is the purpose of a mechanical damper in a mechanical system?
  • What is the difference between a mechanical shock absorber and a hydraulic shock absorber?
  • What is the difference between a mechanical energy absorber and a hydraulic energy absorber?
  • What is the difference between a mechanical vibration isolation system and a hydraulic vibration isolation system?
  • What is the difference between a mechanical system and an electro-mechanical system?
  • What is the difference between a mechanical system and a hydraulic-mechanical system?
  • Explain the working principle of a gas turbine engine.
  • What is the purpose of a turbocharger in an engine?
  • What is the difference between a mechanical drive system and an electrical drive system?
  • What is the difference between a mechanical power source and an electrical power source?
  • What is the difference between a mechanical pump and an electrical pump?
  • What is the difference between a mechanical motor and an electrical motor?
  • What is the difference between a mechanical bearing and a roller bearing?
  • What is the difference between a mechanical gear and an electrical gear?
  • What is the difference between a mechanical chain and an electrical chain?
  • What is the difference between a mechanical cam and an electrical cam?
  • What is the difference between a mechanical linkage and an electrical linkage?
  • What is the difference between a mechanical transmission and an electrical transmission?
  • What is the difference between a mechanical belt drive and an electrical belt drive?
  • What is the difference between a mechanical screw and an electrical screw?
  • What is the difference between a mechanical actuator and an electrical actuator?
  • What is the difference between a mechanical power train and an electrical power train?
  • What is the difference between a mechanical energy source and a solar energy source?
  • What is the difference between a mechanical energy source and a wind energy source?
  • What is the difference between a mechanical energy source and a hydro energy source?
  • What is the difference between a mechanical energy source and a geothermal energy source?
  • What is the difference between a mechanical energy source and a tidal energy source?
  • What is the difference between a mechanical energy source and a nuclear energy source?
  • What is the difference between a mechanical energy source and a fossil fuel energy source?
  • What is the difference between a mechanical energy source and a bioenergy source?
  • What is the difference between a mechanical system and a pneumatic system?
  • What is the difference between a mechanical system and a vacuum system?
  • What is the difference between a mechanical system and a cryogenic system?
  • What is the difference between a mechanical system and a refrigeration system?
  • What is the difference between a mechanical system and an air conditioning system?
  • What is the difference between a mechanical system and a heating system?
  • What is the difference between a mechanical system and a cooling system?
  • What is the difference between a mechanical system and a ventilation system?
  • What is the difference between a mechanical system and an air distribution system?
  • What is the difference between a mechanical system and an air filtration system?
  • What is the difference between a mechanical system and a water treatment system?
  • What is the difference between a mechanical system and a waste management system?
  • What is the difference between a mechanical system and a sewage treatment system?
  • What is the difference between a mechanical system and a water distribution system?
  • What is the difference between a mechanical system and a fire protection system?
  • What is the difference between a mechanical system and a fire suppression system?
  • Explain the working principle of a heat exchanger.
  • What is the purpose of a pressure vessel in a mechanical system?
  • What is the difference between a shell and tube heat exchanger and a plate heat exchanger?
  • What is the purpose of a boiler in a mechanical system?
  • Explain the working principle of a refrigeration cycle.
  • What is the purpose of an expansion valve in a refrigeration system?
  • What is the purpose of a condenser in a refrigeration system?
  • What is the purpose of an evaporator in a refrigeration system?
  • What is the purpose of a compressor in a refrigeration system?
  • What is the difference between a centrifugal pump and a positive displacement pump?
  • What is the difference between a hydraulic pump and a pneumatic pump?
  • What is the difference between a hydraulic system and a pneumatic system?
  • Explain the working principle of a hydraulic actuator.
  • Explain the working principle of a pneumatic actuator.
  • What is the purpose of a relief valve in a hydraulic system?
  • What is the purpose of a pressure switch in a hydraulic system?
  • What is the purpose of a solenoid valve in a hydraulic system?
  • What is the purpose of a check valve in a hydraulic system?
  • What is the purpose of a directional valve in a hydraulic system?
  • What is the purpose of a flow control valve in a hydraulic system?
  • What is the purpose of a counterbalance valve in a hydraulic system?
  • What is the purpose of a pressure control valve in a hydraulic system?
  • What is the purpose of a sequence valve in a hydraulic system?
  • What is the purpose of a logic valve in a hydraulic system?
  • What is the purpose of a pressure reducing valve in a hydraulic system?
  • What is the purpose of a pressure sustaining valve in a hydraulic system?
  • What is the purpose of a pressure relief valve in a hydraulic system?
  • What is the purpose of a pressure sequence valve in a hydraulic system?
  • What is the purpose of a pressure reducing and sustaining valve in a hydraulic system?
  • What is the difference between a linear actuator and a rotary actuator?
  • What is the difference between a hydraulic motor and a pneumatic motor?
  • What is the difference between a hydraulic cylinder and a pneumatic cylinder?
  • What is the difference between a hydraulic drive system and a pneumatic drive system?
  • What is the difference between a hydraulic power source and a pneumatic power source?
  • What is the difference between a hydraulic pump and a pneumatic pump?
  • What is the difference between a hydraulic motor and an electrical motor?
  • What is the difference between a hydraulic cylinder and an electrical cylinder?
  • What is the difference between a hydraulic drive system and an electrical drive system?
  • What is the difference between a hydraulic power source and an electrical power source?
  • What is the difference between a hydraulic pump and an electrical pump?
  • What is the difference between a conventional power transmission system and a non-conventional power transmission system?
  • What is the difference between a belt drive and a chain drive?
  • What is the difference between a gear drive and a belt drive?
  • What is the difference between a hydraulic coupling and a mechanical coupling?
  • What is the difference between a fluid coupling and a mechanical coupling?
  • What is the difference between a hydraulic clutch and a mechanical clutch?
  • What is the difference between a hydraulic brake and a mechanical brake?
  • What is the difference between a hydraulic actuator and a mechanical actuator?
  • What is the difference between a hydraulic system and a mechanical system?
  • What is the difference between a hydraulic drive and a mechanical drive?
  • What is the difference between a hydraulic motor and a mechanical motor?
  • What is the difference between a hydraulic transmission and a mechanical transmission?
  • What is the difference between a hydraulic pump and a mechanical pump?
  • What is the difference between a hydraulic cylinder and a mechanical cylinder?
  • What is the difference between a hydraulic power source and a mechanical power source?
  • What is the difference between a hydraulic system and an electrical system?
  • What is the difference between a hydraulic drive and an electrical drive?
  • What is the difference between a hydraulic motor and an electrical motor?
  • What is the difference between a hydraulic transmission and an electrical transmission?
  • What is the difference between a hydraulic pump and an electrical pump?
  • What is the difference between a hydraulic cylinder and an electrical cylinder?
  • What is the difference between a hydraulic power source and an electrical power source?
  • What is the difference between a hydraulic system and a pneumatic system?
  • What is the difference between a hydraulic drive and a pneumatic drive?
  • What is the difference between a hydraulic motor and a pneumatic motor?
  • What is the difference between a hydraulic transmission and a pneumatic transmission?
  • What is the difference between a hydraulic pump and a pneumatic pump?
  • What is the difference between a hydraulic cylinder and a pneumatic cylinder?
  • What is the difference between a hydraulic power source and a pneumatic power source?
  • What is the purpose of a gearbox in a mechanical system?
  • What is the purpose of a differential in a mechanical system?
  • What is the purpose of a shaft in a mechanical system?
  • What is the purpose of a bearing in a mechanical system?
  • What is the purpose of a coupling in a mechanical system?
  • What is the purpose of a flywheel in a mechanical system?
  • What is the purpose of a drive belt in a mechanical system?
  • What is the purpose of a drive chain in a mechanical system?
  • What is the purpose of a sprocket in a mechanical system?
  • What is the purpose of a gear in a mechanical system?
  • What is the purpose of a clutch in a mechanical system?
  • What is the purpose of a brake in a mechanical system?
  • What is the purpose of a hydraulic actuator in a mechanical system?
  • What is the purpose of a hydraulic system in a mechanical system?
  • What is the purpose of a hydraulic drive in a mechanical system?
  • What is the purpose of a hydraulic motor in a mechanical system?
  • What is the purpose of a hydraulic transmission in a mechanical system?
  • What is the purpose of a hydraulic pump in a mechanical system?
  • What is the purpose of a hydraulic cylinder in a mechanical system?
  • What is the purpose of a hydraulic power source in a mechanical system?
  • What is the purpose of a pneumatic system in a mechanical system?
  • What is the purpose of a pneumatic drive in a mechanical system?
  • What is the purpose of a pneumatic motor in a mechanical system?
  • What is the purpose of a pneumatic transmission in a mechanical system?
  • What is the purpose of a pneumatic pump in a mechanical system?
  • What is the purpose of a pneumatic cylinder in a mechanical system?
  • What is the purpose of a pneumatic power source in a mechanical system?
  • What is the purpose of an electrical system in a mechanical system?
  • What is the purpose of an electrical drive in a mechanical system?
  • What is the purpose of an electrical motor in a mechanical system?
  • What is the purpose of an electrical transmission in a mechanical system?
  • What is the purpose of an electrical pump in a mechanical system?
  • What is the purpose of an electrical cylinder in a mechanical system?
  • What is the purpose of an electrical power source in a mechanical system?
  • What is the purpose of a control system in a mechanical system?
  • What is the purpose of a sensor in a mechanical system?
  • What is the purpose of a signal generator in a mechanical system?
  • What is the purpose of a signal processor in a mechanical system?
  • What is the purpose of a signal amplifier in a mechanical system?
  • What is the purpose of a signal converter in a mechanical system?
  • What is the purpose of a signal filter in a mechanical system?
  • What is the purpose of a signal multiplexer in a mechanical system?
  • What is the purpose of a signal demultiplexer in a mechanical system?
  • What is the purpose of a signal isolator in a mechanical system?
  • What is the purpose of a signal modulator in a mechanical system?
  • What is the purpose of a signal demodulator in a mechanical system?
  • What is the purpose of a signal generator in a control system?
  • What is the purpose of a signal processor in a control system?
  • What is the purpose of a signal amplifier in a control system?
  • What is the purpose of a signal converter in a control system?
  • What is the purpose of a signal filter in a control system?

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