GATE 2019 Strength of Materials Day 9 Quiz

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Question 1

A thin gas cylinder of internal pressure 8 MPa having the inner diameter of 800 mm and thickness of 32 mm. The average circumferential stress (in MPa) is _____.

• A113
• B100
• C543
• D210

Question 2

A thin walled cylindrical pressure vessel having a radius of 0.5 m and wall thickness of 25 mm is subjected to an internal pressure of 700 kPa. The hoop stress developed is

• A14 MPa
• B1.4 MPa
• C0.14 MPa
• D0.014 MPa

Question 3

The possible location of shear centre of the channel section, shown below, is

• AP
• BQ
• CR
• DS

Question 4

A seamless spherical shell, 0.90 m in diameter and 10 mm thick, is being filled with a fluid pressure until the volume increases by 150 cm³. The pressure (in MPa) exerted by the fluid on the shell is
[Take E = 200 GPa and μ = 0.3]

• A1.20
• B1.67
• C1.80
• D2.10

Question 5

Water at 90m head of water flows through a cast iron pipe of diameter 1.5m. The thickness of the pipe required for this if it can withstand a maximum tensile stress of 18MPa would be nearly

• A35mm
• B25mm
• C37mm
• D28mm

Question 6

A thin gas cylinder with an internal radius of 100 mm is subject to an internal pressure of 10 MPa. The maximum permissible working stress is restricted to 100 MPa. The minimum cylinder wall thickness (in mm) for safe design must be

• A10
• B20
• C30
• D75

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