Practice 1 a) D has a number of teeth F. b) B has a diameter C. d) has a faster speed F. g) B has a greater number of teeth than A; the speed of is therefore . e) The speed of is slower than the speed of . f) C has a smaller A, so A has a speed. greater greater faster E B number of teeth than B Using Figure to complete the text below: c) F has a speed . than than than D slower than C Slower than A | UNIT 3 Lecturer: Lang Van Thang ENGLISH FOR AUTOMOBILE ENGINEERING ROTARY SYSTEM Presentation Read the text and complete Practice 1 a) D has a number of teeth F. b) B has a diameter C. d) has a faster speed F. g) B has a greater number of teeth than A; the speed of is therefore . e) The speed of is slower than the speed of . f) C has a smaller A, so A has a speed. greater greater faster E B number of teeth than B Using Figure to complete the text below: c) F has a speed . than than than D slower than C Slower than A Practice 2 a) The ratio of the number of teeth is the size ratio. c) A:C and D:F are . b) The two gear system in Figure are . d) The movement of A is the movement of B. Choose a, b, c, d or e to complete the sentences. Use Figure and Table below: e) The speed of B is the speed of A. f) The direction of movement of D is the direction of movement F. b e c a d b Practice 3 Practice 3 1. If the movement of the bottom pulley is anticlockwise, the movement of the is also . Top pulley Anticlockwise 2. If is clockwise, the movement of the bottom pulley is also . the movement of the top pulley clockwise 3. If the movement of the front sprocket is anticlockwise, the movement of . the rear sprocket is also Anticlockwise 4. small gear , the movement of the large gear is . If the movement of the clockwise is anticlockwise 5. If large is clockwise, the movement of the small gear is . the movement of the anticlockwise gear Practice 4 Read the text following; then complete the second one. Use Figures and . In pulley systems, the diameter of the pulleys is very important. In pulley system in Figure , the diameter of the top pulley is 20 cm and the diameter of the bottom pulley is 10 cm. If the speed of the top pulley is 100 revolutions per minute (100 rev/min), the speed of the bottom pulley is 200 rev/ min. Practice 4 Read the text following; then complete the second one. Use Figures and . Bikes have a sprocket and chain system. The . | UNIT 3 Lecturer: Lang Van Thang ENGLISH FOR AUTOMOBILE ENGINEERING ROTARY SYSTEM Presentation Read the text and complete Practice 1 a) D has a number of teeth F. b) B has a diameter C. d) has a faster speed F. g) B has a greater number of teeth than A; the speed of is therefore . e) The speed of is slower than the speed of . f) C has a smaller A, so A has a speed. greater greater faster E B number of teeth than B Using Figure to complete the text below: c) F has a speed . than than than D slower than C Slower than A Practice 2 a) The ratio of the number of teeth is the size ratio. c) A:C and D:F are . b) The two gear system in Figure are . d) The movement of A is the movement of B. Choose a, b, c, d or e to complete the sentences. Use Figure and Table below: e) The speed of B is the speed of A. f) The direction of movement of D is the direction of movement F. b e c a d b Practice 3 Practice 3 1. If the movement of the bottom pulley is anticlockwise, the movement of the
