1. A steel cylinder of 1 metre diameter is carrying a fluid under a pressure of 10 N/mm². Calculate thenecessary wall thickness, if the tensile stress is not to exceed 100 MPa.[Ans. 50 mm]2. A steam boiler, 1.2 metre in diameter, generates steam at a gauge pressure of 0.7 N/mm². Assumingthe efficiency of the riveted joints as 75%, find the thickness of the shell. Given that ultimate tensilestress = 385 MPa and factor of safety = 5.[Ans. 7.3 mm]3. Find the thickness of a cast iron cylinder 250 mm in diameter to carry a pressure of 0.7 N/mm². Takemaximum tensile stress for cast iron as 14 MPa.[Ans. 6.25 mm]4.A pressure vessel has an internal diameter of 1 m and is to be subjected to an internal pressure of 2.75N/mm² above the atmospheric pressure. Considering it as a thin cylinder and assuming the efficiencyof its riveted joint to be 79%, calculate the plate thickness if the tensile stress in the material is not toexceed 88 MPa.[Ans. 20 mm]5.A spherical shell of 800 mm diameter is subjected to an internal pressure of 2 N/mm². Find thethickness required for the shell if the safe stress is not to exceed 100 MPa.[Ans. 4 mm]6.A bronze spherical shell of thickness 15 mm is installed in a chemical plant. The shell is subjected toan internal pressure of 1 N/mm². Find the diameter of the shell, if the permissible stress for the bronzeis 55 MPa. The efficiency may be taken as 80%.[Ans. 2.64 m]

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A steel cylinder of 1 metre diameter is carrying a fluid under a necessary wall thickness, if the tensile stress is not to exceed 1 A steam boiler, 1.2 metre in diameter, generates steam at a gau the efficiency of the riveted joints as 75%, find the thickness o stress = 385 MPa and factor of safety = 5. Find the thickness of a cast iron cylinder 250 mm in diameter t maximum tensile stress for cast iron as 14 MPa. A pressure vessel has an internal diameter of 1 m and is to be su

A steel cylinder of 1 metre diameter is carrying a fluid under a necessary wall thickness, if the tensile stress is not to exceed 1 A steam boiler, 1.2 metre in diameter, generates steam at a gau the efficiency of the riveted joints as 75%, find the thickness o stress = 385 MPa and factor of safety = 5. Find the thickness of a cast iron cylinder 250 mm in diameter t maximum tensile stress for cast iron as 14 MPa. A pressure vessel has an internal diameter of 1 m and is to be su

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

1. A steel cylinder of 1 metre diameter is carrying a fluid under a pressure of 10 N/mm². Calculate the
necessary wall thickness, if the tensile stress is not to exceed 100 MPa.
[Ans. 50 mm]
2. A steam boiler, 1.2 metre in diameter, generates steam at a gauge pressure of 0.7 N/mm². Assuming
the efficiency of the riveted joints as 75%, find the thickness of the shell. Given that ultimate tensile
stress = 385 MPa and factor of safety = 5.
[Ans. 7.3 mm]
3. Find the thickness of a cast iron cylinder 250 mm in diameter to carry a pressure of 0.7 N/mm². Take
maximum tensile stress for cast iron as 14 MPa.
[Ans. 6.25 mm]
4.
A pressure vessel has an internal diameter of 1 m and is to be subjected to an internal pressure of 2.75
N/mm² above the atmospheric pressure. Considering it as a thin cylinder and assuming the efficiency
of its riveted joint to be 79%, calculate the plate thickness if the tensile stress in the material is not to
exceed 88 MPa.
[Ans. 20 mm]
5.
A spherical shell of 800 mm diameter is subjected to an internal pressure of 2 N/mm². Find the
thickness required for the shell if the safe stress is not to exceed 100 MPa.
[Ans. 4 mm]
6.
A bronze spherical shell of thickness 15 mm is installed in a chemical plant. The shell is subjected to
an internal pressure of 1 N/mm². Find the diameter of the shell, if the permissible stress for the bronze
is 55 MPa. The efficiency may be taken as 80%.
[Ans. 2.64 m]

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