JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech II MECHANICAL TECHNOLOGY Previous Question Paper (May/June - 2019 - R13)
Note: This question paper contains two parts A and B. Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit.
Part A
Classify followers based on surfaces in contact.
Answer
Followers are classified based on the surface in contact as: 1) Knife-edge follower, 2) Roller follower, 3) Flat-faced follower, and 4) Spherical-faced follower.
Name the different motions that a follower can have.
Answer
The common motions of a follower are: 1) Uniform velocity, 2) Simple Harmonic Motion (SHM), 3) Uniform acceleration and retardation, and 4) Cycloidal motion.
Write the difference between Flat belt and V-belt.
Answer
Sign in to view the complete answer paper.
Define Angle of lap.
Answer
Sign in to view the complete answer paper.
What are the three pitches associated with gear manufacturing?
Answer
Sign in to view the complete answer paper.
Define law of gearing.
Answer
Sign in to view the complete answer paper.
Explain a MPFI System.
Answer
Sign in to view the complete answer paper.
What are the major pollutants in the exhaust gas of SI engines?
Answer
Sign in to view the complete answer paper.
Name three types of positive displacement compressors.
Answer
Sign in to view the complete answer paper.
List out the various applications of compressed air.
Answer
Sign in to view the complete answer paper.
Part B
Draw the profile of a cam to operate a roller of 1.5 cm diameter. The center line of the follower of this cam passes through the centre of the cam shaft. The least distance between the centre of the cam shaft and center of roller should be 6cm. the follower executes SHM with a rise of 4 cm during 2/3 of revolution and returns to its original position during the remainder of revolution. Find the maximum velocity and maximum acceleration of the follower during the rise period.
Answer
Sign in to view the complete answer paper.
Derive the expression for displacement, velocity and acceleration for eccentric cam with flat faced followed.
Answer
Sign in to view the complete answer paper.
Derive expression for ratio of tension on tight side and slack side.
Answer
Sign in to view the complete answer paper.
What is slip in belts? Write formula for % slip and state effect of slip on power transmitted.
Answer
Sign in to view the complete answer paper.
Determine the minimum number of teeth required on a pinion, in order to avoid interference which is to gear with a wheel to give a gear ratio 3 to 1. The pressure angle is 20 degrees and a standard addendum of 1 module for the wheel.
Answer
Sign in to view the complete answer paper.
A sun wheel of 28 teeth is in mesh with a planet of 18 teeth and both are held in an arm. The planet wheel is in contact with an internal wheel of 64 teeth which is coaxial with the sun wheel. Sketch the arrangement of the gears and compute the angular velocity ratio between arm and the internal wheel if sun wheel is fixed.
Answer
Sign in to view the complete answer paper.
Describe the various processes of diesel cycle with P-V and T-S diagrams.
Answer
Sign in to view the complete answer paper.
Describe with a line diagram the working principle of battery ignition system.
Answer
Sign in to view the complete answer paper.
Explain the effect of clearance volume in single cylinder single stage compressor.
Answer
Sign in to view the complete answer paper.
Define volumetric efficiency of an air compressor and derive an expression for the same.
Answer
Sign in to view the complete answer paper.