# A composite circular shaft is comprised of a steel core surrounded by an aluminum annulus, perfectly bonded to each other as shown in the figure. If it subjected to a pure torque, which one of the following statements is TRUE? (A) Only shear stress is continuous across the steel-aluminum interface (B) Only shear strain is continuous across the steel-aluminum interface (C) Both shear stress and shear strain are continuous across the steel-aluminum interface (D) Both shear stress and shear strain are discontinuous across the steel-aluminum interface

## Question ID - 1 :- A composite circular shaft is comprised of a steel core surrounded by an aluminum annulus, perfectly bonded to each other as shown in the figure. If it subjected to a pure torque, which one of the following statements is TRUE? (A) Only shear stress is continuous across the steel-aluminum interface (B) Only shear strain is continuous across the steel-aluminum interface (C) Both shear stress and shear strain are continuous across the steel-aluminum interface (D) Both shear stress and shear strain are discontinuous across the steel-aluminum interface

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(B) Only shear strain is continuous across the steel-aluminum interface

Next Question :

A horizontal rectangular plate $\mathrm{ABCD}$ is hinged at points $\mathrm{A}, \mathrm{B}$ and $\mathrm{C} . \mathrm{AC}$ and $\mathrm{BD}$ are diagonals of the plate. Downward force $P$ is applied at $D .$ The upward reactions $R_{A}, R_{B},$ and $R_{C}$ at points $A, B$ and $\mathrm{C}$, respectively, are
(A) indeterminate
(B) $P,-P, P$
(C) $0, P, 0$
(D) $P / 3, P / 3, P / 3$ 