Related Questions

Hollow shafts can be made as strong as solid shafts by making the twisting moments of both the shafts same. Shafts made by __________ have residual stresses.
A Forging
B Cold rolling
C Hot rolling
D Casting
In a cricket season, Bangladesh defeated Australia twice, West Indies defeated Bangladesh twice, Australia defeated West Indies twice , Bangladesh defeated New Zealand twice, West Indies defeated New Zealand twice. Which country has lost most number of times ?
A Bangladesh
B Australia
C New Zealand
D West Indies
Two shafts ‘A’ and ‘B’ under pure torsion are of identical length and identical weight and are made of the same material. The shaft ‘A’ is solid and the shaft ‘B’ is hollow. We can say that
A Shaft B is better than shaft A
B Shaft A is better than shaft B
C Both the shafts are equally good
D None of these
It is required to connect two parallel shafts, the distance between whose axes is small and variable. The shafts are coupled by
A Universal joint
B Knuckle joint
C Oldham's coupling
D Flexible coupling
Two closely-coiled helical springs 'A' and 'B' of the same material, same number of turns and made from same wire are subjected to an axial load W. The mean diameter of spring 'A' is double the mean diameter of spring 'B'. The ratio of deflections in spring 'B' to spring 'A' will be
A $$\frac{1}{8}$$
B $$\frac{1}{4}$$
C 2
D 4
The torque transmitted by a hollow shaft of outer diameter (D) and inner diameter (d) is
A $$\frac{\pi }{4} \times \tau \left( {\frac{{{{\text{D}}^2} - {{\text{d}}^2}}}{{\text{D}}}} \right)$$
B $$\frac{\pi }{{16}} \times \tau \left( {\frac{{{{\text{D}}^3} - {{\text{d}}^3}}}{{\text{D}}}} \right)$$
C $$\frac{\pi }{{16}} \times \tau \left( {\frac{{{{\text{D}}^4} - {{\text{d}}^4}}}{{\text{D}}}} \right)$$
D $$\frac{\pi }{{32}} \times \tau \left( {\frac{{{{\text{D}}^4} - {{\text{d}}^4}}}{{\text{D}}}} \right)$$
When the material of key and shaft is same, and the width of key is one-fourth of the diameter of shaft (d), then length of key will be
A 0.8 d
B 1.2 d
C 1.57 d
D 1.8 d
A hollow shaft will transmit a __________ torque than a solid shaft of the same mass and same material.
A Smaller
B Greater
C Medium
D None of these
B is twice as old as A but twice younger than F. C is half the age of A but is twice older than D. Who is the second oldest ?
A B
B F
C C
D D
The torque transmitted by a solid shaft of diameter (D) is (where $$\tau $$ = Maximum allowable shear stress)
A $$\frac{\pi }{4} \times \tau \times {{\text{D}}^3}$$
B $$\frac{\pi }{{16}} \times \tau \times {{\text{D}}^3}$$
C $$\frac{\pi }{{32}} \times \tau \times {{\text{D}}^3}$$
D $$\frac{\pi }{{64}} \times \tau \times {{\text{D}}^3}$$

Next steps