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ISRO ME 2019 STRENGTH OF MATERIALS 1

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Question 1

A brass bar having a cross-sectional area of 1000 mm2 is subjected to axial forces as shown in the figure Find the total change in length of the bar.
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Question 2

A steel specimen 150 mm2  in cross section and 50 mm gauge length subjected to an axial load of 15 KN. What is the strain energy stored in the specimen?
(take E = 100 GPa)

Question 3

A steel rod 10 m long is at temperature of 20 and is heated to 60. What is the stress induced if the allowable expansion in the rod is 4mm. Young’s Modulus of steel is 200 GPa and coefficient of linear expansion is 12×10-6/.

Question 4

A cantilever of length 2.5 m is subjected to a couple Mo at the free end. The longitudinal (normal) strain at the top surface is 0.0015 and the distance of the top surface of the cantilever from the neutral layer is 100 mm. The radius of the neutral layer is ___ meter.

Question 5

A 3m long cylindrical shaft is rigidly held at its two ends. A pulley is mounted on the shaft at 1m from one end: the shaft is twisted by applying torque on the pulley. The maximum shearing stress developed in 1m and 2m lengths are respectively τ1 and τ2. the ratio τ2:τ1 is

Question 6

The buckling load for a column hinged at both ends is 100 KN. If the ends are fixed, the buckling load changes to

Question 7

A thin cylindrical pressure vessel is subjected to an internal pressure of 3 MPa having diameter and thickness of the cylinder vessel is 600mm and 12 mm respectively. Find the percentage change in volume of the cylinder under given condition if modulus of elasticity is E=200 GPa and poisson's ratio is 0.21.

Question 8

Consider the following beam with loading as shown below.

The magnitude of Maximum value of shear force is __________.

Question 9

A beam of length 5m is simply supported at its ends and carries a point load of 50kN at a distance of 4m from left support. Find the deflection under the load. Given, MOI. =7.33×107mm4, &  E= 2×105N/mm2 .

Question 10

The pressure on the fluid is 3 MPa. The Young’s modulus is 210 GPa and the Poisson’s ratio is 0.25, the volumetric compressive strain produced is
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