Homework Answers
Determine the number of V-belts required to transmit a power of 60 kW at 750 rpm...
Determine the number of V-belts required to transmit a power of 60 kW at 750 rpm from an electric motor to a compressor shaft at 300 rpm. The larger pulley diameter is 1500 mm. The centre distance is 1650 mm, and overload factor is to be taken as 1.5. A belt with cross- sectional area of 350 mm², density of 1000 kg/m and having an allowable tensile strength of 2 MPa is available for use. The coefficient of friction between...
A-V belt is to transmit 20 kW from a 250 mm pitch diameter sheave to a...
A-V belt is to transmit 20 kW from a 250 mm pitch diameter sheave to a 900 mm diameter pulley. The center distance between the two shafts is 1000 mm. The groove angle is 40' and the coefficient of friction for the belt and sheave is 0.2 and the coefficient of friction between the belt and flat pulley is 0.2. The cross-section of the belt is 40 mm wide at the top, 20 mm wide at the bottom and 25...
A V- belt drive is to transmit 24 kW of power from a 200 mm pitch...
A V- belt drive is to transmit 24 kW of power from a 200 mm pitch sheave operating at 1500 rpm to a 600 mm diameter sheave. The distance between the input and the output shafts is 800 mm. The grove angle f = 40o and the coefficient of friction between the belt and the sheave is 0.25. The belt to be used weighs 0.9 kg/m and the allowable tension in the belt is 900 N. How many belts are...
Q – 2. A V-belt drive is to transmit 24 kW of power from a 200...
Q – 2. A V-belt drive is to transmit 24 kW of power from a 200 mm pitch sheave operating at 1500 rpm to a 600 mm diameter sheave. The distance between the input and the output shafts is 800 mm. The grove angle f = 40° and the coefficient of friction between the belt and the sheave is 0.25. The belt to be used weighs 0.9 kg/m and the allowable tension in the belt is 900 N. How many...
Fig. 14.17 A line shaft is to transmit 30 kW at 160 r.p.m. It is driven...
Fig. 14.17 A line shaft is to transmit 30 kW at 160 r.p.m. It is driven by a motor placed directly under it by means of a belt running on alm diameter pulley keyed to the end of the shaft. The tension in the tight side of the belt is 2.5 times that in the slack side and the centre of the pulley over-hangs 150 mm beyond the centre line of the end bearing. Determine the diameter of the shaft,...
Q2. Written assignment: A flat belt is required to transmit (35 kW) from a pulley of...
Q2. Written assignment: A flat belt is required to transmit (35 kW) from a pulley of (1.5 m) effective diameter running at (320 RPM). The angle of contact is spread over (11/24) of the circumference. The coefficient of friction between the belt and pulley surface is (0.3). Determine, taking centrifugal tension into account, width of the belt required. It is given that the belt thickness is (9.5 mm), density of its material is (1100 kg/m²) and the related permissible working...
Q2. Figure Q2 shows a shaft which transmits a power of 48 kW through flat belts. Pulley A is driven by a motor which rotates at 3000 rpm. The diameter of pulley A is 400 mm and that of pulley B is 25...
Q2. Figure Q2 shows a shaft which transmits a power of 48 kW through flat belts. Pulley A is driven by a motor which rotates at 3000 rpm. The diameter of pulley A is 400 mm and that of pulley B is 250 mm. The thickness of the belts is 4 mm and they are made of a material with density of 1100 kg/m3. Assume no sliding between pulleys and belts a) Calculate the speed of the belt and the...
Q.9. Arubberised flat belt is moving at 14 m/s with the tension in the tight side...
Q.9. Arubberised flat belt is moving at 14 m/s with the tension in the tight side of 10.0 kN and the slack side of 5.0 kN. The belt is 350 mm wide and 10 mm thick, and it is constructed of 5 plies of 32 oz canvas ducking. What is tension ratio in the belt? A. 2.0 В. 2.1 С. 1.9 D. 2.3 E. none of above (4 Marks) Q.10. A V-belt drive system is to be designed to transmit...
OCT / NOV 2017 Question 4 (a) Deline what is meant by a weak electrolyte and...
OCT / NOV 2017 Question 4 (a) Deline what is meant by a weak electrolyte and a strong electrolyte by providing an example of each b) Calculate the pH of 0 100 cm2 of a o 85 mol dma soluon of HCI (u) 200 cm3 of a 0 15 mol dm 3 solution of sodium hydroxide (m) A mixture of the above two solutions c) Write the expression for the solublity product constant (Ksp) for a hypothetical species A2Bisi (d)...
Question 5 A multi-disc friction clutch has to be desıgned to transmıt 75 kW from a motor running at 1440rev/mın The di...
Question 5 A multi-disc friction clutch has to be desıgned to transmıt 75 kW from a motor running at 1440rev/mın The discs are to have an outer diameter of 200 mm and an ınsıde diameter of 150 mm Assume condıtion of uniform wear and that the maximum design pressure is lmited to 150 kPa Assume μ-0 25 (12) 5 1 Determine the necessary end thrust and the necessary number of plates After this clutch (from 5 1) in manufactured it...
Determine the number of V-belts required to transmit a power of 60 kW at 750 rpm from an electric motor to a compressor shaft at 300 rpm. The larger pulley diameter is 1500 mm. The centre distance is 1650 mm, and overload factor is to be taken as 1.5. A belt with cross- sectional area of 350 mm², density of 1000 kg/m and having an allowable tensile strength of 2 MPa is available for use. The coefficient of friction between...
A-V belt is to transmit 20 kW from a 250 mm pitch diameter sheave to a 900 mm diameter pulley. The center distance between the two shafts is 1000 mm. The groove angle is 40' and the coefficient of friction for the belt and sheave is 0.2 and the coefficient of friction between the belt and flat pulley is 0.2. The cross-section of the belt is 40 mm wide at the top, 20 mm wide at the bottom and 25...
Q – 2. A V-belt drive is to transmit 24 kW of power from a 200 mm pitch sheave operating at 1500 rpm to a 600 mm diameter sheave. The distance between the input and the output shafts is 800 mm. The grove angle f = 40° and the coefficient of friction between the belt and the sheave is 0.25. The belt to be used weighs 0.9 kg/m and the allowable tension in the belt is 900 N. How many...
Fig. 14.17 A line shaft is to transmit 30 kW at 160 r.p.m. It is driven by a motor placed directly under it by means of a belt running on alm diameter pulley keyed to the end of the shaft. The tension in the tight side of the belt is 2.5 times that in the slack side and the centre of the pulley over-hangs 150 mm beyond the centre line of the end bearing. Determine the diameter of the shaft,...
Q2. Written assignment: A flat belt is required to transmit (35 kW) from a pulley of (1.5 m) effective diameter running at (320 RPM). The angle of contact is spread over (11/24) of the circumference. The coefficient of friction between the belt and pulley surface is (0.3). Determine, taking centrifugal tension into account, width of the belt required. It is given that the belt thickness is (9.5 mm), density of its material is (1100 kg/m²) and the related permissible working...
Q2. Figure Q2 shows a shaft which transmits a power of 48 kW through flat belts. Pulley A is driven by a motor which rotates at 3000 rpm. The diameter of pulley A is 400 mm and that of pulley B is 250 mm. The thickness of the belts is 4 mm and they are made of a material with density of 1100 kg/m3. Assume no sliding between pulleys and belts a) Calculate the speed of the belt and the...
Q.9. Arubberised flat belt is moving at 14 m/s with the tension in the tight side of 10.0 kN and the slack side of 5.0 kN. The belt is 350 mm wide and 10 mm thick, and it is constructed of 5 plies of 32 oz canvas ducking. What is tension ratio in the belt? A. 2.0 В. 2.1 С. 1.9 D. 2.3 E. none of above (4 Marks) Q.10. A V-belt drive system is to be designed to transmit...
OCT / NOV 2017 Question 4 (a) Deline what is meant by a weak electrolyte and a strong electrolyte by providing an example of each b) Calculate the pH of 0 100 cm2 of a o 85 mol dma soluon of HCI (u) 200 cm3 of a 0 15 mol dm 3 solution of sodium hydroxide (m) A mixture of the above two solutions c) Write the expression for the solublity product constant (Ksp) for a hypothetical species A2Bisi (d)...
Question 5 A multi-disc friction clutch has to be desıgned to transmıt 75 kW from a motor running at 1440rev/mın The discs are to have an outer diameter of 200 mm and an ınsıde diameter of 150 mm Assume condıtion of uniform wear and that the maximum design pressure is lmited to 150 kPa Assume μ-0 25 (12) 5 1 Determine the necessary end thrust and the necessary number of plates After this clutch (from 5 1) in manufactured it...
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