TRANSMISSION OF POWER

Other Chapters

• Q1: Define Power.
  Ans: Power is the rate of doing work or the rate of transfer of energy.
• Q2: Define Transmission of Power.
  Ans: Transmission of power is the process of transferring power from one place to another using mechanical systems.
• Q3: State the methods of Transmission of Power.
  Ans: The methods of transmission of power are:

  • ➔ Belt drive
  • ➔ Chain drive
  • ➔ Gear drive
  • ➔ Rope drive
• Q4: Briefly explain the transmission of power through Belts.
  Ans: In belt drive, power is transmitted from one pulley to another using a flexible belt.
  The belt moves over pulleys and transfers motion due to friction between belt and pulley surface.
• Q5: What is Open Belt Drive?
  Ans: An open belt drive is a system in which two pulleys rotate in the same direction using an open belt arrangement.
• Q6: What is Crossed Belt Drive?
  Ans: A crossed belt drive is a system in which two pulleys rotate in opposite directions using a crossed belt arrangement.
• Q7: What is the Velocity Ratio of the Belt Drive?
  Ans: Velocity ratio is the ratio of speed of driven pulley to speed of driving pulley.
  
  VR = N₂ / N₁ = D₁ / D₂
• Q8: What is Slip in the Belt?
  Ans: Slip in a belt is the relative motion between belt and pulley due to loss of frictional grip.
• Q9: Briefly explain the transmission of power through Chain.
  Ans: In chain drive, power is transmitted using a chain that engages with toothed sprockets.
  It provides positive drive without slipping.
• Q10: Briefly explain the transmission of power through Gears.
  Ans: In gear drive, power is transmitted by direct contact between toothed wheels.
  It gives accurate and constant velocity ratio.
• Q11: Briefly explain the transmission of power by Rope.
  Ans: In rope drive, power is transmitted using ropes running over grooved pulleys.
  It is used for long-distance power transmission.
• Q12: What is Flat Belt?
  Ans: A flat belt is a simple flexible belt with a flat surface used to transmit power between pulleys.
• Q13: State the advantages of Flat Belt.
  Ans: The advantages of flat belt are:

  • ➔ Simple and economical
  • ➔ Can transmit power over long distances
  • ➔ Runs smoothly and quietly
• Q14: What is Rope Drive?
  Ans: Rope drive is a system in which power is transmitted using ropes over pulleys for long-distance applications.
• Q15: State the advantages of Rope Drive.
  Ans: The advantages of rope drive are:

  • ➔ Suitable for long distances
  • ➔ Can transmit large power
  • ➔ Smooth operation
• Q16: What is a V Belt?
  Ans: A V belt is a belt with a trapezoidal cross-section used in V-grooved pulleys for power transmission.
• Q17: State the advantages of V Belt.
  Ans: The advantages of V belt are:

  • ➔ No slip occurs easily
  • ➔ High power transmission capacity
  • ➔ Compact design
• Q18: What is Gear Drive?
  Ans: Gear drive is a mechanism in which power is transmitted between two shafts using meshing gears.
• Q19: State the advantages of Gear Drive.
  Ans: The advantages of gear drive are:

  • ➔ Accurate velocity ratio
  • ➔ No slip
  • ➔ High efficiency
• Q20: What is Chain Drive?
  Ans: Chain drive is a system in which power is transmitted using a chain and sprockets.
• Q21: State the advantages of Chain Drive.
  Ans: The advantages of chain drive are:

  • ➔ No slipping
  • ➔ High efficiency
  • ➔ Suitable for medium distances
• Q22: What is a Cross Belt Drive?
  Ans: A cross belt drive is a belt drive in which the belt is crossed so that pulleys rotate in opposite directions.
• Q23: State the advantages of Cross Belt Drive.
  Ans: The advantages of cross belt drive are:

  • ➔ Increases angle of contact
  • ➔ Better grip between belt and pulley
  • ➔ Higher power transmission than open belt
• Q24: Define Clutch.
  Ans: A clutch is a mechanical device used to connect and disconnect the power transmission from the engine to the driving shaft.
• Q25: State the functions of a Clutch.
  Ans: The functions of a clutch are:

  • ➔ To connect and disconnect engine power
  • ➔ To allow smooth starting of vehicle
  • ➔ To change gears without stopping engine
  • ➔ To protect transmission system from overload
• Q26: State the types of Clutches.
  Ans: The types of clutches are:

  • ➔ Friction clutch
  • ➔ Positive clutch
• Q27: What is a Friction Clutch? What is it used for?
  Ans: A friction clutch is a clutch that transmits power using friction between its contacting surfaces.
  
  It is used in automobiles to smoothly engage and disengage power transmission.
• Q28: What is a Positive Clutch? What is it used for?
  Ans: A positive clutch is a clutch in which power is transmitted by direct mechanical engagement without friction.
  
  It is used where no slip is required and accurate power transmission is needed.
• Q29: What is a Single Plate Clutch? Write its uses.
  Ans: A single plate clutch consists of a single friction plate used to transmit power between engine and gearbox.
  
  Uses:

  • ➔ Cars
  • ➔ Light vehicles
• Q30: What is a Multi Plate Clutch? Write its uses.
  Ans: A multi plate clutch uses multiple friction plates to increase friction area and transmit higher torque.
  
  Uses:

  • ➔ Motorcycles
  • ➔ Racing vehicles
  • ➔ Heavy machinery
• Q31: What is a Cone Clutch? Write its uses.
  Ans: A cone clutch uses two conical surfaces to transmit power through friction.
  
  Uses:

  • ➔ Heavy duty machines
  • ➔ Old automobiles
• Q32: What is a Jaw Clutch? Write its uses.
  Ans: A jaw clutch is a positive clutch in which interlocking jaws are used to transmit power.
  
  Uses:

  • ➔ Machine tools
  • ➔ Automatic machines
• Q33: What is a Square Jaws Clutch? Write its uses.
  Ans: A square jaws clutch is a type of jaw clutch in which square-shaped jaws are used for engagement.
  
  Uses:

  • ➔ Heavy duty power transmission
  • ➔ Industrial machines
• Q34: What is a Spiral Jaws Clutch? Write its uses.
  Ans: A spiral jaws clutch is a type of positive clutch in which spiral-shaped jaws are used for smooth engagement.
  
  Uses:

  • ➔ Machines requiring smooth engagement
  • ➔ Heavy mechanical systems