Paper II
(Conventional.).
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ITirne Allowed: Three Hours I
INSTRUCTIONS
Candidates should atteTnpt Question No. 1. in Section A which is c07npulsory, TWO questions from Section B and TWO questions fr07n
. Section C.
Question No. J.. is of short answer type. The number of marks carried by each
subdivision of a question is indicated at the end of the subdivision/question.
-Answers Inust be written in ENGLISH.
Assulne suitable data, if necessary and indicate the sante clearly .
._W.
herever a question is atteTnpted, all its
subdivisions ",ust be attempted.
Unless otherwise indicated, sYlnbols and notations used have their usual nl-eanings.
Neat sketches to be drawn, wherever required.
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A-FTF-J-N FB 1 IContd.]
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1. (a)
SECTION A
A balance mass of• value
2- m is placed
3
diametrically opposite to the crank at crank
radi us r. Wha t IS the expreSSIon for the unbalanced for.ce along the line of stroke of a reciprocating engine for angular position a of'ub.e crank with respect to the line of stroke ?
(b) (i) What is an isochronous governor ?
(ii) State the phenomenon of hunting In a spring controlled governor.
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Cc) (i)
(ii)
Explain briefly vibration isolation and tra nsrnissi hil ity.
The natural frequency of a system put on 'a foundation is (.On' The operating frequency
is 00. What is the ~!nimurn value of ( :n)
beyond which the vibration isolation IS
possible or meaningful ?
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