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* Multiple Choice Questions (mcq) on Strength Of Materials– Thin And Thick Shells—-2

Multiple Choice Questions (mcq) on Strength Of Materials– Thin And Thick Shells—-2

Which one is most important in a thin shell?

  1. d/t <20
  2. d/t> 10
  3. Stresses are uniform
  4. None

(Ans:c)

 

Hoop strain in a thin shell is

  1. σh /E
  2. σl /E
  3. 3 σh /E
  4. None

(Ans:d)

 Longitudinal  strain in a thin shell is

  1. σh /E
  2. σl /E
  3.  σr /E
  4. None

(Ans:d)

 

Considering σh, σl and σr, maximum shear stress will be

  1. h—σl) /2
  2. l— σh) /2
  3. h + σr) /2
  4. None

(Ans:c)

 

Value of σr in a thin shell is

  1. pD/2t
  2. pD/4t
  3. pD/3t
  4. None

(Ans:d)

 

In a thin shell which stress is negligible

  1. σh
  2. σl
  3. σr
  4. None

(Ans:c)

 

 In a thick shell which stress is negligible

  1. σh
  2. σl
  3. σr
  4. None

(Ans:b)

 

Maximum shear stress in a thick shell is

  1. h+ σl)/2
  2. h+ σr)/2
  3. h– σl)/2
  4. None

(Ans:b)

 

Which stress is constant in a thick shell

  1. σh
  2. σl
  3. σr
  4. None

(Ans:b)

 

The thick shell is made from laminations to get

(a)   Increased stresses

(b)  Decreased stresses

©   Uniform stresseses

(d) None

(Ans:c)

 

A thick cylinder under external fluid pressure’ p0′ will have maximum stress at the

  1. Outer radius
  2. Inner radius
  3. Mean radius
  4. None

(Ans:b)

 

A thick cylinder under internal fluid pressure’  pi will have maximum stress at the

  1. Outer radius
  2. Inner radius
  3. Mean radius
  4. None

(Ans:b)

 

A thick cylinder under pi and po will have maximum stress at the

  1. Outer radius
  2. Inner radius
  3. Mean radius
  4. None

(Ans:b)

 

Hoop shrinking in thick cylinders is done to achieve

(a) Increased stresses

(b)  Decreased stresses

©   Uniform stresses

(d) None

(Ans:c)

 

The maximum strain in a thick cylinder under pi will be

  1. σh/E+μ σl/E
  2. σh/ E+ μσr/E
  3. σr/E+μ σl/E
  4. None

(Ans:b)