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Roll No……………………………..
Code No. : 0054
Total No. of Page : 4
Sl. No. 19176
ODD SEMESTER EXAMINATION, DECEMBER – 2019
[Fifth Semester] Three Years Diploma Course in Mechanical Engineering ( Automobile) [741]
[Fifth Semester] Three Years Diploma Course in Mechanical Engineering ( Computer Aided Design) [742]
[Fifth Semester] Three Years Diploma Course in Mechanical Engineering ( Production) [743]
[Fifth Semester] Three Years Diploma Course in Mechanical Engineering ( RAC) [744]
[Fifth Semester] Three Years Diploma Course in Mechanical Engineering ( Maintenance) [745]
[Fifth Semester] Three Years Diploma Course in Mechanical Engineering ( Automobile) 
{Lateral Entry} [784]
[Fifth Semester] Three Years Diploma Course in Mechanical Engineering (Computer Aided Design ) {Lateral Entry}[785]
[Fifth Semester] Three Years Diploma Course in Mechanical Engineering (Production){Lateral Entry} [786]
[Fifth Semester] Three Years Diploma Course in Mechanical Engineering ( Maintenance ) {Lateral Entry}[787]
[Fifth Semester] Three Years Diploma Course in Mechanical Engineering (  RAC ) [{Lateral Entry}788]


DESIGN & ESTIMATION
Time :- 02:30 Hours 
Maximum Marks : 50
Minimum Marks : 17
NOTES :
         i)      Attempt all questions.
         ii)     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 students answer the  question according to the English version.
         iii)     Use of Paper and Mobile Phone by the students is not allowed.  
 
Q1) Attempt any two parts.
         a)    What is meant by temporary and permanent fasteners? Explain with examples.
         b)     What are the advantages of threaded joints.
         c)     Write down steps for designing a bolt.
 
 Q2) Attempt any two parts. 
         a)     Write down (3) applications each of welded and riveted joints.
         b)     Compare at least three characteristics of welded and riveted joints.
         c)      Explain with neat sketch, three types of lap joints.
 
Q3) Attempt any one parts.
          a)     Derive an expression for minimum stress and deflection in a semi elliptical laminated  leaf spring.
           b)    A line shaft rotating at 200 rpm is to transmit 20 kw. The shaft may be assumed to be made of mild steel (M.S ) with allowable shear stress of 42 MPa. Determine the diameter of shaft neglecting Bending moment in shaft.
 
 Q4) Attempt any one parts.
           a)    Write five functions and uses of spring.
           b)     Differentiate with example and sketch open and closed coiled helical spring. Where are open coiled springs used?
 
Q5) Attempt any one parts.
            a)     Write down ten steps of designing a spur gear and a helical gear separately.
            b)      Explain how will you estimate the time of threading operation of a shaft of 10 mm diameter on a Lathe Machine.