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Brain Storming

Brain Storming. Questions & Answers. 4. 5. 6. 2. 3. 1. 11. 12. 7. 8. 9. 10. 17. 13. 14. 15. 16. 18. Q1. A is twice the large of B, Specify direction and speed If A rotates once then B will rotate ………. Answer. Q2. A is twice the size of B.

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Brain Storming

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  1. Brain Storming Questions & Answers Eng. Islam Al-Jarrah

  2. 4 5 6 2 3 1 11 12 7 8 9 10 17 13 14 15 16 18 Eng. Islam Al-Jarrah

  3. Q1 • A is twice the large of B, Specify direction and speed • If A rotates once then B will rotate ……….. Answer Eng. Islam Al-Jarrah

  4. Q2 • A is twice the size of B. • What is the speed, direction and number of turns for B if A is the Driver. Answer Eng. Islam Al-Jarrah

  5. Q3 • Pulley A is twice pulley B, Pulley B is the Driver. • What is the speed, direction, force and number of turns? Answer Eng. Islam Al-Jarrah

  6. Q4 • Pulley "A" is half the size of pulley "B" and rotates a full circle twice. • What is the minimum weight that can hang from pulley "A" to just balance the 10kg mass hanging from pulley "B"? • How many times will pulley "A" make a full rotation? Answer Eng. Islam Al-Jarrah

  7. Q5 • Pulley "A" is connected to the shaft of a motor. The motor can generate enough force to just lift a 8kg mass off the ground. Pulley "A" rotates in the direction of the arrow. • Is the system of pulleys on the right sufficient to provide enough force to lift the 30kg mass off the ground? • Will the 30kg mass be lifted off the ground by the motor? Explain. Answer Eng. Islam Al-Jarrah

  8. Q6 • What is the force needed by the man to lift the 200 kg block? Answer Eng. Islam Al-Jarrah

  9. Q7 • What is the output in revolutions per minute at Gear C? • Hint: (Speed gear A * Number of teeth Gear A) = (Speed  gear B * Number of teeth gear B) Answer Eng. Islam Al-Jarrah

  10. Q8 • What is the speed for Gear C, what is the direction? • What do we call Gear B? Answer Eng. Islam Al-Jarrah

  11. Q9 • Calculate the output speed (the speed at which the blue gear moves) if: V1= 3000 (Orange gear) and t1=20 teeth, T2 = 50 teeth and T3 = 200 teeth Answer Eng. Islam Al-Jarrah

  12. Q10 • In a compound gear, all gears are fixed on the same axel moving at the same speed. • This is an example of a “compound gear train”. Gear A rotates in a clockwise direction at 30 revs/min. What is the output in revs/min at D and what is the direction of rotation ? • TA=50, TB=20, TC=30, TD=10 Answer Eng. Islam Al-Jarrah

  13. Q11 • What is the Gear Ratio if A is the Driver? • What is the Gear Ratio if C is the driver? • Which will have higher speed/force at the driven gear? Answer Eng. Islam Al-Jarrah

  14. Q12 • Which Gears are the Idler Gears? • What is the purpose of the Idler Gear? Answer Eng. Islam Al-Jarrah

  15. Q13 Answer Eng. Islam Al-Jarrah

  16. Q14 Answer Eng. Islam Al-Jarrah

  17. Q15 Answer Eng. Islam Al-Jarrah

  18. Q16 Answer Eng. Islam Al-Jarrah

  19. Q17 Answer Eng. Islam Al-Jarrah

  20. Q18 Answer Eng. Islam Al-Jarrah

  21. A1 • Increase in speed if A is the driver • Same direction of rotation • B will rotate two turns as A turns once. Home Eng. Islam Al-Jarrah

  22. A2 • Opposite direction • Different speed. • A will rotate once and B twice Home Eng. Islam Al-Jarrah

  23. A3 • Same direction of Rotation. • The speed of A is half the speed of B • The force used by A is double the force exerted by B. • A will rotate once when B rotates twice. Home Eng. Islam Al-Jarrah

  24. A4 • 5 Kg. • A will turn one time Home Eng. Islam Al-Jarrah

  25. A5 • Yes it is sufficient • The force needed by the motor will be less than 8 • 30/4 < 8 • Yes it will be lifted Home Eng. Islam Al-Jarrah

  26. A6 • The effort needed will equal 50 since 200 / 4= 50. • 4 is the number of ropes excluding the one connected to the effort. Home Eng. Islam Al-Jarrah

  27. A7 • 60*20=10*S • S=60*20/10=120 • 120REV/min Home Eng. Islam Al-Jarrah

  28. A8 • 90*30=15*S • S=90*30/15=180 • S=180Rev/Min • The Direction of C will be the same as in A. • B is called an Idler. Home Eng. Islam Al-Jarrah

  29. A9 • 3000*20=200*S • S=3000*20/200 • S=300 Home Eng. Islam Al-Jarrah

  30. A10 • Direction of rotation will be the same at D & A • The speed is : • C & D will have the same speed so, • 30*50=20*SB • Sb=75Sc=75 • So, 75*30=10*Sd • Sd=225 Home Eng. Islam Al-Jarrah

  31. A11 • When A is the Driver • GR=15/30=1/2 • When C is the Driver: • GR=30/15=2 • The first case will provide higher speed at the driven gear, but the second case will provide more force. Home Eng. Islam Al-Jarrah

  32. A12 • All the gears between the driver and the driven are called idlers and are used to make the driven gear rotate at the same direction of the Driver gear. Home Eng. Islam Al-Jarrah

  33. A13 Home Eng. Islam Al-Jarrah

  34. A14 Home Eng. Islam Al-Jarrah

  35. A15 Home Eng. Islam Al-Jarrah

  36. A16 Home Eng. Islam Al-Jarrah

  37. A17 Home Eng. Islam Al-Jarrah

  38. A18 Home Eng. Islam Al-Jarrah

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