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A gear set has a pinion with 20 teeth and a gear with 40 teeth. The pinion runs at 30 rev/s and transmits a power of 20 kW. The teeth are on the 20° full – depth system and have a module of 5 mm. The length of the line of action is 19 mm.
[1] The center distance for the above gear set in mm is [2 marks]
(A) 140
(B) 150
(C) 160
(D) 170[2] The contact ratio of the contacting tooth is [2 marks]
(A) 1.21
(B) 1.25
(C) 1.29
(D) 1.33[3] The resultant force on the contacting gear tooth in N is [2 marks]
(A) 77.23
(B) 212.20
(C) 225.80
(D) 289.43asked in Mechanical Engineering, 2007
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Match the most suitable manufacturing processes for the following parts.
Parts Manufacturing Processes P : Computer chip 1. Electrochemical Machining Q : Metal forming dies and molds 2. Ultrasonic Machining R : Turbine blade 3. Electrodischarge Machining S : Glass 4. Photochemical Machining
(A) P-4, Q-3, R-1, S-2
(B) P-4, Q-3, R-2, S-1
(C) P-3, Q-1, R-4, S-2
(D) P-1, Q-2, R-4, S-3
asked in Mechanical Engineering, 2007
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