Strength of Materials The effort required to lift a load W on a screw jack with helix angle a and angle of friction Wtan(a + <)>) Wtan(a-<)>) Wcos(a + ) Wsin(a + <(>) Wtan(a + <)>) Wtan(a-<)>) Wcos(a + ) Wsin(a + <(>) ANSWER DOWNLOAD EXAMIANS APP
Strength of Materials Two coplanar couples having equal and opposite moments Produce a couple and an unbalanced force Produce a moment of couple Balance each other Are equivalent Produce a couple and an unbalanced force Produce a moment of couple Balance each other Are equivalent ANSWER DOWNLOAD EXAMIANS APP
Strength of Materials If n = number of members andy = number of joints, then for a perfect frame, n = (d)3/-2 j-2 2/-3 (b)2j-l (d)3/-2 j-2 2/-3 (b)2j-l ANSWER DOWNLOAD EXAMIANS APP
Strength of Materials D Alembert’s principle is used for determining stresses in the truss reducing the problem of kinetics to equivalent statics problem designing safe structures stability of floating bodies determining stresses in the truss reducing the problem of kinetics to equivalent statics problem designing safe structures stability of floating bodies ANSWER DOWNLOAD EXAMIANS APP
Strength of Materials If a number of forces act simultaneously on a particle, it is possible To replace them by a couple Not a replace them by a single force To replace them by a single force through C.G. To replace them by a single force To replace them by a couple Not a replace them by a single force To replace them by a single force through C.G. To replace them by a single force ANSWER DOWNLOAD EXAMIANS APP
Strength of Materials The center of percussion of the homogeneous rod of length L suspended at the top will be L/3 L/2 3L/4 2L/3 L/3 L/2 3L/4 2L/3 ANSWER DOWNLOAD EXAMIANS APP
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