Theory of Machines Old Papers PDF

## THEORY OF MACHINES ### Code No.: 2335 ### [Maximum Marks: 50] ### Time: 2:30 Hours - Attempt all questions. - Answer any two parts of every question. - Students are advised to specially check the Numerical Data of question paper in both versions. If there is any difference in Hindi Translation of...

## THEORY OF MACHINES ### Code No.: 2335 ### [Maximum Marks: 50] ### Time: 2:30 Hours - Attempt all questions. - Answer any two parts of every question. - Students are advised to specially check the Numerical Data of question paper in both versions. If there is any difference in Hindi Translation of any question, the students should answer the question according to the English version. - Use of Pager and Mobile Phone by the students is not allowed. ### Q1) - Differentiate between higher pair and lower pair with example - State the importance of balancing of machines. - Classify vibrations and explain each type briefly ### Q2) - Discuss inversions of a mechanism. Explain any one with example. - What is the difference between analysis of mechanism and synthesis of mechanism? - Explain the process of kinematic analysis of four bar mechanism. ### Q3) - Why is dynamic force analysis necessary? - Give the analytical method for the velocity and acceleration of a piston. - Explain the dynamic analysis of slider crank mechanism. ### Q4) - Discuss inversions of a mechanism. Explain any one with example. - What is the difference between analysis of mechanism and synthesis of mechanism? - Explain the process of kinematic analysis of four bar mechanism. ### Q5) - Describe Flywheel and give its uses. - Define the following cam terminology: Base circle, cam profile, lift, Angle of Ascent, Angle of Decent, Dwell. - Explain the displacement diagram of CAM, with uniform acceleration. ## MACHINE DESIGN ### Code No.: 2270 ### [Maximum Marks: 50] ### Time: 2:30 Hours - Attempt all questions. - Students are advised to specially check the Numerical Data of question paper in both versions. If there is any difference in Hindi Translation of any question, the students should answer the question according to the English version. - Use of Pager and Mobile Phone by the students is not allowed. ### Q1) - Define stress concentration and explain methods to reduce it. - Name various "types of design" and explain them in brief. - Classify Design Failure theories. Explain Rankine's theory for design failure. ### Q2) - Explain following terms with neat sketch: Tensile load, Compressive load, Shear load. - A 20 cm long circular shaft was found to stretch 4.0 mm by force of 14 N. Assuming the shaft is circular and has diameter approximately 9.0 mm, then calculate Young's modulus under tensile stress. - Determine the diameter of shaft to transmit 60 KW power at 150 rpm. Permissible shear stress for shaft is 63 N/mm² ### Q3) - What do you understand by key? With help of neat sketches, explain various types of keys starting application of each one of them. - A pulley is fixed on 100 mm diameter shaft with help of 100 mm long key. The shaft is required to transmit 6000 N.m torque with help of key. Determine dimensions of key. Ultimate compressive stress is 500 N/mm² Ultimate Shear Stress is 250 N/mm² Desired Factor of safety is 5. ### Q4) - Explain with help of neat sketch a cotter joint and show various parts of joint. - Classify various types of Riveted joints with help of neat sketch. ### Q5) - With help of neat figure, explain design procedure of protected type Flange coupling. - Explain method for finding efficiency of power screw. ## THEORY OF MACHINES ### Code No: 2335 ### [Maximum Marks: 50] ### Time: 2:30 hours - Answer any two parts from each question. - Students are advised to specially check the Numerical Data of question papers in both versions. If there is any difference in Hindi Translation of any question, the students should answer the question according to the English version. - Use of Pager and Mobile Phone by the students is not allowed. ### Q1) - Define the following with one example: Kinematic link, Higher pair. - Define 'structure' and 'machine'. State how these differ from each other? - Compare the advantages of a gear drive with belt drive. ### Q2) - What is a four bar chain. Explain and give its one inversion. - Explain, what do you understand by: slip and creep in belt drive. Why the pulleys are crowned? - List various types of gear trains. Explain the working of any one of them with its purpose. ### Q3) - Explain the principle of a flywheel and draw its tuning moment diagram. - What is meant by H.P? Mention its formula and describe the various terms and their units in this formula. - Explain the difference between a governor and flywheel. Where do each one of these are used? Explain. ### Q4) - Enumerate various types of cams and followers. Where do we use cam and follower? Explain. - Write a short note on Simple Harmonic Motion and give its one practical example. - Explain why do we need to balance the rotating masses. If this is not done, what is the effect on rotating elements? ### Q5) - Write a short note on damping of vibrations. Mention one material for this purpose. - Write a short note on Gyroscopic effect in machines. - Mention briefly: Chain drive, Cross-belt drive.