Engineering Mechanics Efficiency of a screw jack is given by (where α = Helix angle, and φ = Angle of friction.) None of these tan(α + φ)/tanα tanα/tan (α + φ) tan(α - φ)/tanα None of these tan(α + φ)/tanα tanα/tan (α + φ) tan(α - φ)/tanα ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics The velocity ratio of a simple wheel and axle with D and d as the diameters of effort wheel and load axle, is D / d D × d D - d D + d D / d D × d D - d D + d ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics The time of flight of a projectile on downward inclined plane depends upon Angle of projection None of these Angle of inclination of the plane Both (A) and (B) Angle of projection None of these Angle of inclination of the plane Both (A) and (B) ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics The algebraic sum of moments of the forces forming couple about any point in their plane is Both of above are wrong Constant Equal to the moment of the couple Both of above are correct Both of above are wrong Constant Equal to the moment of the couple Both of above are correct ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is known as Principle of transmissibility of forces None of these Principle of resolution of forces Principle of independence of forces Principle of transmissibility of forces None of these Principle of resolution of forces Principle of independence of forces ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics The force required to move the body up the plane will be minimum if it makes an angle with the inclined plane __________ the angle of friction. Greater than Less than None of these Equal to Greater than Less than None of these Equal to ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS