The coefficient of efficiencies between different transmission elements are not usually at the same value. Table 1 below, shows the efficiencies of different transmission elements. Analyze table 1 and answer the questions below. Table 1: Coefficient of Efficiencies between the transmission elements Coefficient Types of Transmission or Support of Efficiency Belt Drive with flat belt 0.98 Belt drive with V-Belt 0.96 Spur Gear drive Helical Gear Drive 0.98 0.97 Bevel Gear Drive 0.96 Ball or Roller Bearing 0.995 Crank and Slider mechanism 0.9 Jaw Clutch Multiple-disc friction clutch operating in oil 0.95 0.9 a) How are these coefficient values are calculated? b) Base on your analysis, why the value of Belt Drive with V-Belt is having a lower coefficient compared to flat belt? c) Define the highest coefficient of efficiency and state one (1) reason of why.

The coefficient of efficiencies between different transmission elements are not usually at the same value. Table 1 below, shows the efficiencies of different transmission elements. Analyze table 1 and answer the questions below. Table 1: Coefficient of Efficiencies between the transmission elements Coefficient Types of Transmission or Support of Efficiency Belt Drive with flat belt 0.98 Belt drive with V-Belt 0.96 Spur Gear drive Helical Gear Drive 0.98 0.97 Bevel Gear Drive 0.96 Ball or Roller Bearing 0.995 Crank and Slider mechanism 0.9 Jaw Clutch Multiple-disc friction clutch operating in oil 0.95 0.9 a) How are these coefficient values are calculated? b) Base on your analysis, why the value of Belt Drive with V-Belt is having a lower coefficient compared to flat belt? c) Define the highest coefficient of efficiency and state one (1) reason of why.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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A 3000 lb car has a 5-speed manual transmission with 2 .31 ti (transmission ratio) , 1 .22 ti , 4.13 ti , 0 .14 ti , 7 .05 ti . The final drive ratio is 6 .3 ai . The air drag coefficient is 0.32 and the front projected area is 21 square feet. The rolling resistance coefficient is 0.02 and the tire radius is 12 inches. The effective mass factor is 1.0. The power train efficiency is 0.95. The engine wide-open-throttle output torque is shown in the figure. a) Determine the transmission input torque when the vehicle is cruising at a constant speed of 65mph on a 5% slope in the 5th gear. b) When the vehicle speed is 65mph on a 5% slope in the 5th gear, the driver makes a five to four downshift and floors the throttle. Determine the vehicle acceleration immediately after the shift. c) Determine the largest slope the vehicle can negotiate at a speed of 60mph in the 4th gear.
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A four-stroke SI engine 0.08 m bore (d), 0.10 m stroke (L), is tested at full throttle at constant speed. The fuel supply is fixed at 0.0011333 kg/s and the spark plugs of the four cylinders are successively short circuited without change of speed, brake torque being correspondingly adjusted. The brake power (bp) measurements are the following:With all cylinders firing = 12.5 kWWith cylinder No. 1 cut off = 9 kWWith cylinder No. 2 cut off = 9.15 kWWith cylinder No. 3 cut off = 9.2 kWWith cylinder No. 2 cut off = 9.1 kWThe lower calorific (or heating value, LCVf) of the fuel is 44100 kJ/kg. The clearancevolume (Vcl) of one cylinder 70.0 x 103 mm3. Determine:(a) Indicated power (ip) of the engine under these conditions.(b) The indicated thermal efficiency (c) The relative efficiency of this engine. (d) Draw schametic diagram
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3. Critically discuss the relationship between Pascal’s law and displacement transmission
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Round off 4 decimal, Powerplant subject A dynamometer test was done for one hour at steady load on a 6 cylinder diesel engine. It was found to use 42 kg of fuel having Q h = 42,000 J/g. Cylinder is 22.8 cm x 27 cm, 4 cycle type. Speed, 550 rpm and dynamometer torque at 27000 kg cm. Determine the brake power (KW) and the brake thermal efficiency (%).