Theory of Machines (TOM) important questionsMost repeated in SPPU papers
These 9 questions appeared in more than one SPPU Theory of Machines paper we have: 8 papers, from Mar 2023 to Mar 2026. The most-asked come first. Each one links to the papers it was asked in.
Repeated questions
Endsem questions (9)
- 5×asked
- 3×asked
- 2×asked
An epicyclic gear train consist of three gears A, B and C as shown in fig. The number of teeth on annular gear A is 74 and on gear C is 34. The gear B meshes with both gear A and C and it is carried on an arm F which rotates about the centre A at 25 RPM. If the gear A is fixed, Find the speed of gear B and C. 4
- 2×asked
- 2×asked
A cam is to be designed for a knife edge follower with the following data: i) Cam lift = 40 mm during 90º of cam rotation with simple harmonic motion. ii) Dwell for the next 30º iii) During the next 60º of cam rotation, the follower returns to its original position with simple harmonic motion. iv) Dwell during the remaining 180º Draw the profile of the cam when the line of stroke is offset 20mm from the axis of the cam shaft. The radius of the base circle of the cam is 40 mm.
- 2×asked
- 2×asked
A cam operates a roller, inline reciprocating fol1ower while rotating at 300 rpm. The further specifications are: Minimum radius of the cam = 25mm, Lift of follower = 30mm, Diameter of roller = 15mm Angle of lift =120° (Nature of lift is S.H.M.), Outer dwell angle = 30°, Angle of return = l50° (Nature of return is uniform acceleration and retardation where acceleration is equal to retardation in magnitude).Draw the cam profile. 4
- 2×asked
- 2×asked
Two mating gears have 20 and 40 involute teeth of module 10 mm and 20° pressure angle. The addendum on each wheel is to be made of such a length that the line of contact on each side of the pitch point has half the maximum possible length. Determine the addendum height for each gear wheel, legth of the path of contact. arc of contact and contact ratio.
Questions count as repeated when their wording matches closely across papers. Numericals that depend on a figure are left out, since the figure changes from paper to paper.