(Homework's)Q1/ Two shafts which are 300 mm apart are to be connected by spur gearing. The driving shaft rotates at1400 rpm and the driven is to be rotate at an approximate speed of 400 rpm If the moduke pitch of thegears is 8 mm, determine the number of teeth on the gears and the actual speed of the driven shaft. Assumethat the gears available are of teeth rising in steps of 3 and the smallest gear dose not has teeth kess than 15.Q2/ Find the pitch diameter, diametral pitch and module of a toothed gear having 36 teeth and circular pitch of13 mm.Q3/ Two wheels of 18 and 45 teeth respective ly are geared together. Determine the pitch circke radius of the twowheeks, if the circular pitch is 50 cm.Q4/ In a compound train of gears spur gear 1, with 40 teeth and rotating at 15 rpm, drives a pinion 6 with 15teeth at 300 rpm across two intermediate spindles. The first intermediate has gears 2 and 3 and the secondcarries gears 4 and 5. Gear 2 gearing with gear 1 while 3 gearing with gear 4 and 5 gearing with gear 6. Ifgears 2, 4 and 5 have 20, 15 and 30 teeth respective ly, calculate the number of teeth on gear 3.(7-10)Q5/ An epicyclic gear train shown gear B has 80 teeth and is rigidly fixedto the motor shaft. Gear C has 16 teeth and gears with B and alsowith gear D which has 20 teeth. The arm rotates about the same shafton which B is fixed and carries gear C and D. If the arm runs at 1000rpm, find the speed of gear C and D.and B are intemal gears and the gearQ6/ An epicyclic gear train shown, the gearsC-D is a compound gear. The gears E and F have the same pitch and number ofteeth (T, = T; = 18). T. = 28 and Ta = 26. (1) Find the number of teeth on A andB; (2) If the arm G makes 100 rpm clockwise and A is fixed, find the speed ofB; and (3) If the arm G makes 100 rpm clockwise and wheel A makes 10 rpmcounter clockwise ; find the speed of wheel B. (Note A and B not a compoundgears)Q7/ An epicyclic train of gear as shown in figure, how many revolution does thearm, to which the pinions B and C are attached, make: (a) When A makesone revolution clockwise and D makes halfand (b) When A makes one revolution clockwise and D is fixed. Thenumber of teeth in the gear A and D are 40 and 90 respectively.revolution anticlockwise,Q8/ An epicycic reduction gear shown in figure, has a shaftA fixed toarm. The arm has a pin fixed to its outer end and two gears C and Ewhich are rigidly fixed (C-E compound gear) revolve on this pin.Gear C meshes with annukar gear D and gear E with pinion F. G isthe driver gear and D is kept stationary. The number of the teeth is as-follows: Tp = 80, Te =10, TE = 24 and Tp = 10. The gear G runs at200 rpm, find the speed of shaft A.Q9/ An epicyclic train as shown in figure below is composed of a fixed annularwheel A having 150 teeth. Meshing with A is a wheel B which drives wheelD through an idle wheel C, D being concentric with A. Wheek B and C arecarried on an arm which revolves clockwise at 100 rpm about the axis of Aor D. If the wheels B and D are having 25 teeth and 40 teeth respectively,find the number of teeth of C and the speed and direction of rotation of C.Q10/ An epicycic gear train shown in figure, the arm is keyed to the same shaft as theload drum and the wheel A is keyed to the second shaft which carries a chain wheel,the chain being operated by hand. The two shafts have common axis but can rotateindependently. The wheek B and C are compound and rotate together on a pincarried at the end of arm. The wheel D has internal teeth and is fixed to the outercasing of the block so it does not rotate. The wheels A and B have 16 and 36 teethrespectively and the gears have equal module of 3 mm The speed of A is 100 rpmwhen the speed of arm is 10 rpm. Find the number of teeth on wheels C and D.(8-10)

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