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DR. BABASAHEB AMBEDKAR TECHNOLOGICAL UNIVERSITY, LONERE
Semester Examination – MAY  2019


Branch: SY Mechanical Engineering
Sem.: IV
Subject with Subject Code: SOM (BTMEC403)
Date: 20052019
Marks: 60
Time: 3 Hr.
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Instructions to the Students
1
2
3
4
. Each question carries 12 marks.
. Attempt any five questions of the following.
. Illustrate your answers with neat sketches, diagram etc., wherever necessary.
. If some part or parameter is noticed to be missing, you may appropriately
assume it and should mention it clearly
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(Marks)
Q.1. a) Define the following terms
i) Young’s Modulus
ii) Modulus of Rigidity
iii) Poisson’s ratio
iv) Factor of safety
v) Hook’s law
(05)
b) Two brass rods and one steel rod together support a load as shown in Fig
2
below. If the stresses in brass and steel are not to exceed 60 N/mm and
2 5
20N/mm , find the safe load that can be supported .Take E for steel = 2 x 10
2 5 2
1
N/mm and for brass = 1 x 10 N/mm . The cross sectional area of steed rod is
1
2
2
500 mm and of each brass rod is 1000 mm .
(07)
OR
b) A steel rod of 3 cm diameter is enclosed centrally in a hollow copper tube of
external diameter 5 cm and internal diameter of 4 cm. The composite bar is then
subjected to an axial pull of 45000 N. If the length of each bar is equal to
1
5 cm. Determine:
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