Mohr's circle (1)

The figure shows the state of stress at certain point in a stresses body. The magnitudes of normal stresses in x and y direction are 100 MPa and 20 MPa respectively. The radius of Mohr’s stress circle representing this state of stress is

• 120

• 80

• 60

• 40

What does the Mohr's Circle represent ?

• Strain on planes

• Shear on planes

• 1. Friction on planes

• 1. Stresses on planes

The angle between Major Principal plane and Minor Principal plane for a strained body is: 

• 45

• 30

• 60

• 90

The state of stress represented by Mohr’s circle shown in the figure is

• pure shear

• 1. hydrostatic stress

• 1. biaxial tension of equal magnitude

• 1. uniaxial tension

A two dimensional fluid element rotates like a rigid body. At a point within the element, the pressure is 1 unit. Radius of the Mohr’s circle, characterizing the state of stress at that point, is

• 0
• 2
• 1
• 0.5

Which of the following is used as the center of Mohr's Circle?

• The maximum shear stress (τmax)
• The difference in normal stress (σx - σy)
• The sum of shear stresses (τx + τy)
• The average normal stress (σx + σy) / 2

• If σx​=60 MPa , σy=20σy​=20 MPa, τxy=40τxy​=40 MPa

Find the normal stress on a plane oriented 45 degrees to the x-axis.

• 30 MPa
• 100 MPa
• 80 MPa
• 50 MPa

The item consists of two statements, one labelled as the 'Statement (I)' and the other as 'Statement (II)'. You are to examine these two statements carefully and select the answers to these items using the codes given below:

Statement (I): Any orthogonal set of axes are 180° to one another on Mohr's circle.

Statement (II): The distance between these axes is half the diameter of the circle.

• Both statements are true.
• Both statements are false.
• Statement (I) is true, Statement (II) is false.
• Statement (I) is false, Statement (II) is true.

The angle between the principle plane and the plane of maximum shear is

• 90

• 125

• 60

• none of these

The maximum shear stress produced in a rectangular beam of width 200 mm and depth 300 mm is subjected to a shear force of 200kN

• 10 N/mm2

• 7.5 N/mm2

• 5 N/mm2

• 2 N/mm2