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From a series of tri-axial tests conducted on some sandstone specimens, the relationship between the major and the minor principal stresses in MPa is found to be σ<sub>1</sub> = 100 + 5 σ<sub>3</sub>. The angle of internal friction in degrees of that sandstone is

Correct Answer: 42

A series of tri-axial compression tests conducted on sandstone samples reveal the following relationship between major and minor principal stresses σ1 = 50 + 30σ3 [stresses are in MPa)
The cohesion in MPa and angle of internal friction in degrees of sandstone respectively are

A body starts yielding when it is subjected to stress state with principal stresses of 250 MPa, 50 MPa and - 50 MPa. What is the yield strength of the material. in MPa, if Tresca yield criterion is obeyed?

The uniaxial compressive strength of a limestone sample is 80 MPa. The sample is confined at a pressure of 20 MPa in a triaxial compressive strength test. Based on Hoek-Brown failure criteria the maximum principal stress at failure in MPa is
(Consider rock constants as m = 7.88, s = 1.0 and a = 0.5)

Which of the following statements are true?
(1) Minor's contract can be ratified on attaining majority.
(2) Minor's contract cannot be ratified on attaining majority.
(3) Minor's contract can be ratified jointly by both the parties to the contract.
(4) Minor is not liable under minor's contract.
(5) Minor's contract is an enforceable contract.

The 3-dimensional state of stress consists of 3 unequal principal stresses acting on a point, this is called the triaxial state of stress. If two of the three principal stresses are equal, the state of stress is known as __________

The three-dimensional state of stress consists of 3 unequal principal stresses acting on a point, this is called the triaxial state of stress. If all the three principal stresses are equal, the state of stress is known as __________

Directions : Following question consists of a statement followed by three arguments I, II and III . You have to decide which of the arguments is a STRONG arguments and which is a WEAK Argument.

Statement : Should admission to all professional courses be made on the basis of past academic performance rather than through entrance tests?

Arguments :
I. Yes. It will be beneficial for those candidates who are unable to bear the expenses of entrance tests.
II. Yes. Many deserving candidates securing high marks in their qualifying academic examinations do not perform well on such entrance tests.
III. No. The standard of examinations and assessment conducted by different Boards and universities are not comparable and hence there is a need to conduct entrance tests to calibrate them on a common yardstick.

Determine the principal normal stress and shear stress for the following case: σx=240 MPa σy=-30 MPa τ= 50 Mpa.

A minor enters into agreement representing himself to be major
Consider the following statements:
1. Minor commits fraud if the other party does not have personal knowledge of his age
2. Such agreement is enforceable
3. The doctrine of estoppel does not apply in minor's case
4. Other party is entitled to get back the benefit passed to minor, if innocent about his age
Which of the statements given above are correct?

Find the value of shear stress acting on the body, if the principal normal stresses are 70MPa and 60 MPa. The angle of inclination is 30 degrees?