Download DBATU B-Tech 1st Year 2017 Oct Engineering Mechanics Question Paper

Download DBATU (Dr. Babasaheb Ambedkar Technological University) B.Tech First Year 2017 Oct Engineering Mechanics Question Paper

DR. BABASAHEB AMBEDKAR TECHNOLOGICAL UNIVERSITY, LONERE ?
RAIGAD -402103
Mid Semester Examination ? October - 2017
Branch: Group B Sem.:- I
Subject with Subject Code:-Engineering Mechanics ME 102 Marks: 20
Date:- 03/10/2017 Time:? 1 Hr.
Instructions:- Assume the appropriate data if not given
. (Marks)
Q. No.1 Fill in the blanks , (06)
a) The Free body diagram of a body we ------ all the supports and -------
them by the reactions which these supports exert on the body. (subtract,
remove, add, replace, represent)
b) Moment of a force about a point is equal to the ------- of the forces and ?
--------- distance of the point from the line of action of the force.
(addition, multiplicatio n, product, parallel, perpendicular, equal)
c) Frame is a structure consisting of --------- bars or members pinned
together and in which one or more than one of its members is subjected
to more than ------ forces. (one, two, several, ?x)
Q. No. 2 Attempt any one of the following: (06)
a) A uniform wheel 60 cm in diameter rests against a rigid rectangular
block 15 cm thick as shown in the ?gure. Find the least pull force P
through the centre of the wheel to just turn the wheel over the corner
of the block. All surfaces are smooth. End also the reaction of the
block. The wheel weights 10,000 newtons. (Figure -1)
P
60 cm dia
RECTANGULAR
BLOCK W"
15cm l
1 l

Q.2. b) Explain and elaborate the following
i) Parallelogram Law
ii) Varignon's Theorem
iii) Trusses and frames
Q.N0 3. Attempt any two of the following (08)
a.) A beam is supported and loaded by hinged support at A and roller
support at B as shown in the ?gure. Find the reactions at A and B
(?gure -2)
mm 4?- ?_, 20kN
1
L m Dr?DOSmIOkN 1m
AL .13
\ 0 1m 10m 4?10-5'? E .9.
' "??20kN I
3m ' ! 3m . 3m 3m .
Figure -2
b) Find the axial force in the member DE of the truss using the method
of sections. (figure?3)
2m AkN
Figure?3
c) How will you ?nd out the resultant of two parallel forces acting in the
same direction. Explain with neat diagram.
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