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:
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
