Download DBATU (Dr. Babasaheb Ambedkar Technological University) B.Tech First Year 2017 May Basic Mechanical Engineering Question Paper
Max?Marks:60 ' I ?I .t 3' :
INSTIRUTIONS: I)
Q. 1(a)
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(iit
(ii )
Q- 2(3)
End Semester Ex?mhi?nativon _I '
1 Seth B. Tech.
0 ? IMY 20%?
Max' Time: 3 hIOur
Sub: Basic. Mechanical Ehgineering :-
Attcmpt ?ny FIVE qUest?ipns. . ?-
2) Necessary data are given In theit'eSpectiye questions. If such data is
not given, it means that the knowledge ofthat data is a part of the
examination.
3) Make suitable assumptions if necessary and state them clearly
giving reasons.
4) Use of necessary charts and tgble? aIlrIe permittecIi.
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Write name of the specialization ,Qf-Mechanicall-..Ertgineer'ing?of the following
applications/activities they belong (1122(8) . . ' -
Sr.No Expmple/Activity, ? .?r -. ls.? Specialization ?1
1r.? r! ?i.' l
Cooling of an lillgine. I
Propeller shaft material selection ?3. . -
Insulation SCIECtiOl?f Of'a r'e??ig?ra'torm WW
Fixing of the Tic ro?d dimensions. I . I ___
Thread generation?onthe bolt .. i,_ 42...,? . .. __,H_ t _I__
Working ofa heatpump .I, II n; 1 1i _\;:;-.-4.,- ;' n it' 7.1;;
Selection offastener for a car ?
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Temperature measurementbqu-thetmpcouplem. . :~- : 'a
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Attempt Any TWO . .
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State the First law of Thermodynamics for a closed system undergoing the cycle and
change of state. (4)
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A domestic food freezer. maintai?s'"a' t?l?pef?t?r???b?f? ?1'5"?C.? The ? ambient air
temperature is 30 0C. If heat ,le?k'sj??otfreez?t?at"theb'ohfihu?tisr?te of 2 kJ/S? what is
the least power necessary to ?pIump?tIlj'iIs' heat Qu?t co?ti?hitb?'silYId)" ? '
'L?I:." t?. {.iLr-I : . _W , ._
A heat pump is used to 'heth :a; roomi'andjr?aintain"temperamie' "as 25 ?C while: the
ambient temperature is -5 "(?.?Calm?gtt?e?the maximum'possi?bl?e?heat Supplied by the' said
heatpump per kW ofpowerIinbut.,(4I)I?I' ? ? " ? ' ' ?
'??: H ? ii?? 9:?
Classify the IC engine with resfpect to_. ._ _ . I .7
Cycle of operation, cylinder "arrangement, type Of igniti'on, type of fuel used. type of
cooling, and compression ratio. (6),
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(b) The cubic capacity of a foui stroke en ine1is 240 cubic centimetre The stroke to bore
ratio is 1.5. The clearance \olume is' 0 tube centimetre Calculate the bore, stroke,
and compression ratio of the ehgihe; (6) 1 . ,. , 1 ,
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- 1 1 : - l
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0.3 AttemptAnyTWO i; ,1 :3" i ' -,;?j
(11) Draw the neat .labelled diagi 21111 of 6 Gas' power plant and brie?y dxplam its working (6)
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(1)) Draw the neat labelled diagram of P Nuclear rector and brieHy explain its parts. (6)
.l 1 .
(1:) Draw the neat labelled di-agrpm Lf Ia Leaf spring suspension system'- and. write the
functions of the suspension system in a vehicle ( 6)
Q. 4 (11) De?ne the following terms with suitable examples Mechanisms, Constrained motion,
lower pair, higher pair, links and degree of freedom. (6)
([1) De?ne the factor safety and e list all the factom with One line ?sti1ca'tlion for each to
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decide the factor of safety. (6) 1.1 "1?!
Q. 5 (21) Write the salient features of the power transmission devices and enlist the advantages of
V belt over ?at belt power transmission device (6)
(1)) Draw the neat labelled di?gteiri of a p'ortable drill! rii?Chine'and ?nlist all its" Essential
features withjusti?cations (6) ' n 1: ., "'11 l.? ?l? 1
Q. 6 (21) Classify the different type of the materials used in engmeermg applications and write
two applications and two characterisncs of each.| (6) "
(h) Draw the neat labelled diagrams pg?. a Lathe machine and erilist _all its necessary
speci?cations. (6) _ _ ,
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This post was last modified on 17 May 2020