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Question 31

MPPGCL Assistant Engineer 2025• Technical

Which of the following correctly defines true stress as compared to engineering stress?

  1. AOption (a)

    True stress is based on the initial cross-sectional area

  2. BOption (b)

    True stress = Engineering stress × (original length / instantaneous length)

  3. COption (c)

    True stress = Load / instantaneous cross-sectional area

  4. DOption (d)

    True stress is always less than engineering stress 

View answer & explanation

Correct answer

Answer: (a)A.

True stress is based on the initial cross-sectional area

Explanation not yet available.

Question 32

MPPGCL Assistant Engineer 2025• Technical

According to Euler’s theory, the critical buckling load for a column with both ends pinned is: 

  1. AOption (a)

    \(\rm P_{cr}=\frac{\pi^2EI}{L^2}\)

  2. BOption (b)

    \(\rm P_{cr}=\frac{\pi^2EI}{4L^2}\)

  3. COption (c)

    \(\rm P_{cr}=\frac{\pi^2EI}{L}\)

  4. DOption (d)

    \(\rm P_{cr}=\frac{\pi^2EI}{2L}\)

View answer & explanation

Correct answer

Answer: (a)A.

\(\rm P_{cr}=\frac{\pi^2EI}{L^2}\)

Explanation not yet available.

Question 33

MPPGCL Assistant Engineer 2025• Technical

When a shaft is subjected to a bending moment M and torque T, the equivalent stress can be computed using:

  1. AOption (a)

    only torsion equation

  2. BOption (b)

    only bending equation

  3. COption (c)

    Maximum shear stress theory or Von Mises theory

  4. DOption (d)

    Rankine’s theory

View answer & explanation

Correct answer

Answer: (a)A.

only torsion equation

Explanation not yet available.

Question 34

MPPGCL Assistant Engineer 2025• Technical

In matrix analysis, the global coordinate system is: 

  1. AOption (a)

    local to each member

  2. BOption (b)

    based on material properties

  3. COption (c)

    a fixed reference for the whole structure

  4. DOption (d)

    arbitrarily changing for each load case

View answer & explanation

Correct answer

Answer: (a)A.

local to each member

Explanation not yet available.

Question 35

MPPGCL Assistant Engineer 2025• Technical

A three-hinged arch does not develop thermal stresses because:

  1. AOption (a)

    it is statically indeterminate

  2. BOption (b)

    there are no vertical loads

  3. COption (c)

    it is flexible at the crown hinge

  4. DOption (d)

    temperature affects only pinned supports

View answer & explanation

Correct answer

Answer: (a)A.

it is statically indeterminate

Explanation not yet available.

Question 36

MPPGCL Assistant Engineer 2025• Technical

The flexibility and stiffness matrices are:

  1. AOption (a)

    additive 

  2. BOption (b)

    multiplicative inverses

  3. COption (c)

    identical

  4. DOption (d)

    diagonal matrices

View answer & explanation

Correct answer

Answer: (a)A.

additive 

Explanation not yet available.

Question 37

MPPGCL Assistant Engineer 2025• Technical

A two-hinged arch, subjected to a temperature increase, will generally develop:

  1. AOption (a)

    no horizontal thrust

  2. BOption (b)

    increased vertical reactions

  3. COption (c)

    an increased horizontal thrust

  4. DOption (d)

    a decreased span

View answer & explanation

Correct answer

Answer: (a)A.

no horizontal thrust

Explanation not yet available.

Question 38

MPPGCL Assistant Engineer 2025• Technical

What is the main disadvantage of the Working Stress Method?

  1. AOption (a)

    It always gives the lightest structure possible

  2. BOption (b)

    It does not consider the actual collapse behaviour and results in uneconomical designs.

  3. COption (c)

    It ignores the elastic behaviour of materials.

  4. DOption (d)

    It cannot be used for steel design.

View answer & explanation

Correct answer

Answer: (a)A.

It always gives the lightest structure possible

Explanation not yet available.

Question 39

MPPGCL Assistant Engineer 2025• Technical

When is it NOT necessary to check deflection in a reinforced concrete member, as per IS 456 (2000)?

  1. AOption (a)

    When the beam is simply supported

  2. BOption (b)

    When the span-to-depth ratio is within permissible limits

  3. COption (c)

    When the member is short

  4. DOption (d)

    When the live load is less than 5 kN/m2

View answer & explanation

Correct answer

Answer: (a)A.

When the beam is simply supported

Explanation not yet available.

Question 40

MPPGCL Assistant Engineer 2025• Technical

According to IS 800:2007, the shear buckling resistance of an unstiffened web of a beam is checked when its depth-to-thickness ratio (d/tw) exceeds ____ Where \(\in=\sqrt{\frac{f_y}{250}}\)

fy = Yield stress of the web material in MPa

d = Clear depth of web between flanges

tw = Thickness of the web

  1. AOption (a)

    50 ε

  2. BOption (b)

    67 ε

  3. COption (c)

    85 ε

  4. DOption (d)

    100 ε

View answer & explanation

Correct answer

Answer: (a)A.

50 ε

Explanation not yet available.
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