Mechanical Engineering MCQ

1. What does “two degrees of freedom” refer to in a vibrating system? a) The system’s ability to move in two different directions simultaneouslyb) The … Read more

1. What type of vibration occurs when a system is subjected to a harmonic force with a single degree of freedom? a) Random vibrationb) Free … Read more

1. What is the coefficient of damping in a damped free vibration system? a) The ratio of viscous force to velocityb) The ratio of damping … Read more

1. What are the main causes of vibrations in engineering systems? a) Friction and wearb) Resonance and dampingc) External forces and unbalanced massesd) Heat and … Read more

1. Which of the following is a method of forced induction used to increase engine power?a) Direct injectionb) Carburetionc) Superchargingd) Valve timing Answer: c) SuperchargingExplanation: … Read more

1. Which of the following is not a commonly used liquid alternative fuel for internal combustion engines? a) LPGb) Biogasc) Hydrogend) Ethanol Answer: d) Ethanol … Read more

1. Which stage of combustion in CI engines is characterized by a delay between injection and ignition? a) Delay periodb) Pre-combustionc) Main combustiond) Post-combustion Answer: … Read more

1. What is the primary factor influencing flame development and propagation in an internal combustion engine? a) Fuel octane ratingb) Air-fuel mixture ratioc) Engine compression … Read more

1. What is the primary difference between a Spark Ignition (SI) engine and a Compression Ignition (CI) engine? a) Fuel injection mechanismb) Ignition timingc) Ignition … Read more