# MCQ-STRESSES IN ROTATING DISCS

https://www.mesubjects.net/wp-admin/post.php?post=7429&action=edit          MCQ Shear stresses in beams-1

https://www.mesubjects.net/wp-admin/post.php?post=8001&action=edit         MCQ Shear stresses in beams-2

https://www.mesubjects.net/wp-admin/post.php?post=4179&action=edit         MCQ Bending stresses in beams-1

https://www.mesubjects.net/wp-admin/post.php?post=10594&action=edit       MCQ Stresses in Rotating Discs

https://www.mesubjects.net/wp-admin/post.php?post=4236&action=edit             MCQ Shear force and B.M.-2

# DISCS

## & further improvements.

### (a) Linear

(b) Parabolic

(c) Exponential

(d) None

ANS: (b)

Stress in a thin rotating disc is

(a) ρ r ω2

(b) m r ω2

ANS: (c )

(b) (3+μ)ρR2ω2

### (d) None

ANS: (b)

Radial stress at the center of a solid rotating disc is

(b) (3+μ)ρR2ω2

### (d) None

ANS: (b)

Maximum hoop stress in a hollow rotating disc is

(a) (ρω2/4)[(3+μ)Ro2 +(1-μ) Ri2] at r=Ri

(b)(ρω2/8)[(3+μ)Ro2 +(1-μ) Ri2] at r=Ri

(c)(ρω2/4)[(3-μ)Ro2 +(1-μ) Ri2] at r=Ri

(d) None

ANS: (a)

Maximum radial stress in a hollow rotating disc is

(a)(ρω2/4)[(3+μ)(Ro –Ri)2 at r=Ri

(b) ((ρω2/4)[(3+μ)(Ro –Ri)2at r=(Ri Ro)0.5

ANS: (c )