| If two springs k1 and k2 are placed in parallel, the combined stiffness of spring is |
A) k1 + k2
B) k1 + k2/k1k2
C) (k1k2)/k1 + k2
D) k1k2
| For the shafts having square cross sections, the maximum shear stress occurs at a point |
A) on the edge of the cross section that is closest to the centre axis of the shaft.
B) on the diagonal of the cross section that is far to the centre axis of the shaft.
C) on the diagonal of the cross section, at half the edge length from the centre axis of the shaft.
D) on the diagonal of the cross section, at one-fourth of diagonal length from the centre axis of the shaft.
| A shaft 9 m long is subjected to a torque 30 t-m at a point 3m distant from either end. The reactive torque at the nearer end will be |
A) 5 tonnes meter
B) 10 tonnes meter
C) 15 tonnes meter
D) 20 tonnes meter
| What would be the shape of the failure surface of a standard cast iron specimen subjected to torque? |
A) Cup and cone shape
B) Plane surface perpendicular to the axis
C) Pyramid type wedge shaped
D) Helicoidal surface
| A chalk piece firmly fixed at one end and applied with a clockwise torque at the other end. The crack formed will be |
A) Clockwise with axis
B) Anti-Clockwise with axis
C) Vertical
D) Not able to access
| A shaft is subjected to pure torsion. Surface of the shaft represents |
A) plane stress condition only
B) plane strain condition only
C) both plane stress as well as plane strain conditions
D) neither plane stress nor plane strain condition
| Arrange the following sections in increasing torsional stiffness : 1. Open ring section 2. Close ring section 3. L-section 4. Circular disk section |
A) 1, 2, 3, 4
B) 3, 1, 2, 4
C) 3, 2, 1, 4
D) 4, 3, 1, 2
| The spring constant of a helical compression spring does not depend on |
A) coil diameter
B) material strength
C) number of active turns
D) wire diameter
| Which of the following statement(s) is / are correct with reference to shafts subjected to torsion? (i) If two shafts have the same Polar Moment of Inertia, maximum shear stress values induced in both the shafts must be same. (ii) If two shafts have same Torsion carrying capacity, their Polar Moment of Inertia must be same. |
A) Only (i)
B) Only (ii)
C) Both (i) and (ii)
D) Neither (i) nor (ii)
| A stepped solid circular shaft A-B-C is fixed at A and C. The diameter of part AB is twice that of part BC, while length and material of both the parts are same. If a torsional moment T is applied at junction B, shear stress induced in outermost layer of shaft AB is |
A) same as that of shaft BC
B) twice than that of shaft BC
C) half than that of shaft BC
D) sixteen times that of shaft BC
