This question was previously asked in

SSC JE EE Previous Paper 7 (Held on: 4 March 2017 Evening)

Option 1 : 16 times

ST 1: Logical reasoning

5265

20 Questions
20 Marks
20 Mins

**Concept:**

A metallic bellow is a series of circular parts, resembling the folds in an accordion. These parts are formed or joined in such a manner that they expanded or contracted axially.

The displacement of the bellows element is given by

\(d=\frac{0.453~Pbn{{D}^{2}}\sqrt{1-{{\nu }^{2}}}}{E{{t}^{3}}}\)

Where P = pressure in N/m^{2}

b = radius of each corrugation

n = thickness of the wall in m

D = mean diameter, m

E = modulus of elasticity, N/m^{2}

ν = Poisson’s ration

**Calculation:**

\(d\propto \frac{n}{{{t}^{3}}}\)

n made double and t made half, hence displacement becomes 16 times.