Download DBATU B.Tech 2019 Oct-Nov Mech 1st Sem Theory of Machine II Question Paper

Download DBATU (Dr. Babasaheb Ambedkar Technological University) B Tech 2019 Oct-Nov (Bachelor of Technology) Mech 1st Sem Theory of Machine II Question Paper

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DR: BABASAHEB 'AMBEDKAR TECHNOLOGICAL UNIVERSITY; LONERE I
Mid Semester Examihation? ?Sept./0ct. 2019
COurse: B. Tech' 1n ___TY Meek -I Sem:I
Subject Name: Theory Of Machine ~11 , , ? Subject Code: BTMEC 504
Max Marks: 20 , , Date:- ?709/2019 Duration:- 1 Hr.
InstructiOns to ithe'Students: .
1. All questions are compulsory
2. Assume suitable data, if necessary
. \ _ _ , , (Level/CO) Marks
1 Q. 1 Solve the follewing ? ' , V I ?6'
1. De?ne the eentrifugahensmn 111 a belt
2. Explain the 111131311111 a belt?.
3. De?ne the :3 angle of gears I
_, ' thhadvantages of Involute gears V, ?
5 Compare the spur, Helical & Herringbone gear i
6 What are the applications of gear train
NNNNHF?
Q.2 Solve Any Two of the following ' " ? . ' 3 X 2
(A) Explain the phenomena of? slip? and? creep? in a belt drive
(B) ? EXpIairt the phenOmenoh interference and undercutting for involute gears?
(C) Explain the siInple and compound gear train 3
Q. 3 Solve Any One of the following. . . . 8
(A) Two mating involute spur gear of 20? pressure angle have a gear ratio of 2. The 2
number of teeth on the 11111101115 20 and its speed 15 250 r. p m The module pitch
of the teeth 1s 12 111111 If me addendum 011 each wheel 15 such that the path of
approach and the path of 11111335 on each side are half the maximum possible
lengthm find: 1. the addendum for pirhon and gear Wheel; 2. the length of the
arc of contact; and 3. the maximum velocity of sliding during apprOach and
recess. ASsume pinion to be the driver. .
(B) In a spiral gear drive connecting two sha?s, the approximate centre distance 15 2
400 mm and the speed ratio= 3. The angle between the two shafts 15 50? and
the 1111111131 11111311 18 18 1111111113 Spiral 311313 for the drivmg and driven wheels
are equal. F 1nd 1. Number of teeth on each wheel, 2. Exaet centre distance,
and 3. Ef?cienCy of the drive, if friction angle= 6?.
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