English
Hindi

Question

Download Solution PDF

A spherical vessel with an inside diameter of 2 m is made of material having an allowable stress in tension of 500 kg/cm2. The thickness of a shell to withstand a pressure of 25 kg/cm2 should be:

This question was previously asked in
NPCIL Stipendiary Trainee ME 2018
Download PDF Attempt in App
View all NPCIL Scientific Assistant Papers >
  1. 5 cm
  2. 10 cm
  3. 2.5 cm
  4. 1.25 cm

Answer (Detailed Solution Below)

Option 3 : 2.5 cm
Free Tests
View all Free tests >
Free
NPCIL Scientific Assistant Quantum Mechanics Test
10 Qs. 10 Marks 13 Mins
Start Now

Detailed Solution

Download Solution PDF

Concept:

For thin spherical vessel:

For a thin spherical pressure vessel, both longitudinal and hoop stress is the same and given as

Calculation:

Given:

d = 2 m, σL = 500 kg/cm2, P = 25 kg/cm2, t = ?

t = 2.5 cm 

Download Solution PDF
Latest NPCIL Scientific Assistant Updates

Last updated on Mar 27, 2025

-> NPCIL Scientific Assistant Recruitment Notification 2025 is out! 

->The Nuclear Power Corporation of India Limited (NPCIL) has released the NPCIL Scientific Assistant Recruitment notification for 45 vacancies.

-> Candidates can apply online start applying from 12 March 2025 till 1 April 2025.

-> NPCIL Exam Date 2025 is yet to be announced, candidates can keep a check on the official website for latest updates.

-> Candidates with diploma in Civil/Mechanical/Electrical/Electronics with a minimum of 60% marks are eligible to apply. 

Exams Tests Super Practice

More Analysis of Thin Sphere Questions

Q1.What is the maximum possible radius of a sphere of thickness 1 cm made of a metal with maximum allowable stress as 90 MPa that can hold an internal pressure of 15 MPa without failing ?
Q2.Find the stress acting on the surface of a thin sphere of diameter 15 cm, thickness 0.25 cm and the internal pressure is 2 MPa
Q3.A spherical vessel with an inside diameter of 2 m is made of a material having allowable stress in the tension of 500 kg/cm2. The thickness of a shell to withstand a pressure of 50 kg/cm2 should be
Q4.A compressed air spherical tank having an inner diameter of 450 mm and a wall thickness of 7 mm is formed by welding. If the allowable shear stress is 40 MPa, the maximum permissible air pressure in the tank will be nearly
Q5.A spherical vessel with an inside diameter of 2 m is made of material having an allowable stress in tension of 500 kg/cm2. The thickness of a shell to withstand a pressure of 25 kg/cm2 should be:
Q6.A thin spherical shell of diameter (d) and thickness (t) is subjected to an internal pressure (p). The stress in the shell material is
Q7.A thin spherical shell of diameter 200 mm is subjected to an internal pressure of 2 MPa, If admissible tensile stress is 40 MPa, then the thickness of the shell is:
Q8.A spherical pressure vessel (made of mild steel) of internal diameter 500 mm and thickness 10 mm is subjected to an internal gauge pressure of 4000 kPa. If the yield stress of mild steel is 200 MPa, the factor of safety (up to one decimal place) is ______
Q9.A thin walled spherical shell is subjected to an internal pressure. If the radius of the shell is increased by 1% and the thickness is reduced by 1%, with the internal pressure remaining the same, the percentage change in the circumferential (hoop) stress is

More Pressure Vessels Questions

Q1.What will be the nature of longitudinal stress in a thin closed cylinder containing hydrostatic fluid pressure?
Q2.What will be the value of the maximum absolute shear stress produced in a thin cylinder if hoop stress = 40 MPa and longitudinal stress = 20 MPa?
Q3.What is correct for hydrostatic state of stress?
Q4.A cylindrical pipe of diameter 1.5 m and thickness 1.5 cm is subjected to internal fluid pressure of 1.2 N/mm2. Determine the longitudinal stress developed in the pipe.
Q5.If the thin cylindrical shell whose diameter is 'd' is subjected to an internal pressure 'p', then the ratio of longitudinal stress to the hoop stress is-
Q6.A seamless pipe having a diameter of 600 mm and thickness of 9 mm, contain the fluid under a pressure of 4 MPa, find the longitudinal stress developed in the pipe.
Q7.For thin cylindrical shell structures loaded in compression, the design is based on
Q8.A boiler of 1.6 m diameter is made of a 20-mm thick plate. What will be the permissible steam pressure in the boiler in the maximum tensile stress in the plates must NOT exceed 80 MPa?
Q9.For a rivetted thin cylindrical shell of internal diameter (d), thickness of shell wall (t) and internal pressure (P) with efficiency of longitudinal joint (ηl); the hoop (tress σc) will be given by:
Q10.Which among the following stress act along the circumference of the cylinder?
Suggested Test Series
View All >
NPCIL Scientific Assistant Physics Mock Test
38 Total Tests with 1 Free Tests
Start Free Test
NPCIL Scientific Assistant Mechanical Mock Test
56 Total Tests with   1 Free Tests
Start Free Test

ISRO Technical Assistant Important Links

Answer KeyEligibility CriteriaSalary & Job ProfileSyllabus and Exam PatternBooksAdmit Card

More Strength of Materials Questions

Q1.What will be the nature of longitudinal stress in a thin closed cylinder containing hydrostatic fluid pressure?
Q2.A steel bar (E = 200E = 200, α = 12 × 10 − 6/°C) expands by 0.3 mm due to  a temperature increase. If the original length of the bar was 15 cm, what was the temperature rise?
Q3.In the Charpy impact test, the specimen is typically:
Q4.Which of the following represents the polar modulus of the hollow shaft? [ If Do = External diameter and Di = Internal diameter ]
Q5.A simply supported beam with a span length of 5 m carries a moment of 20 N-m (counterclockwise direction) at the middle of the beam. What will the value of reactions be at both the ends of the beam?
Q6.What will be the shape of the bending moment diagram for a cantilever beam carrying a uniformly distributed load throughout its length?
Q7.If a component has a Factor of Safety (FoS) of 1.0, what does it indicate?
Q8.If elastic strength increases 3 times, then Proof Resilience:
Q9.If the external diameter of a hollow shaft is three times greater than its internal diameter, what is the ratio of its torque-carrying capacity compared to that of a solid shaft of identical material and the same outer diameter?
Q10.For a thin planar ring of radius ‘r’ mm and thickness ‘t’ mm, its radius of gyration about the polar axis in mm is:
Testbook Edu Solutions Pvt. Ltd.
1st & 2nd Floor, Zion Building,
Plot No. 273, Sector 10, Kharghar,
Navi Mumbai - 410210
support@testbook.com
Toll Free:1800 833 0800
Office Hours: 10 AM to 7 PM (all 7 days)
Company
About usCareers We are hiringTeach Online on TestbookPartnersMediaSitemap
Products
Test SeriesTestbook PassOnline CoursesOnline VideosPracticeBlogRefer & EarnBooks
Copyright © 2014-2022 Testbook Edu Solutions Pvt. Ltd.: All rights reserved
User PolicyTermsPrivacy
Hot Links： teen patti star apk teen patti game - 3patti poker teen patti win teen patti all games