Theory of Machine In a screw jack, the effort required to lower the load W is given by P = W cos(α + φ) P = W tan(α + φ) P = W tan(α - φ) P = W tan(φ - α) P = W cos(α + φ) P = W tan(α + φ) P = W tan(α - φ) P = W tan(φ - α) ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Which of the following is false statement in respect of differences between machine and structure? Efficiency of machines as well as structures is below 100 % In machines, relative motion exists between its members, whereas same does not exist in case of structures Machines modify movement and work, whereas structures modify forces Machines transmit mechanical work, whereas structures transmit forces Efficiency of machines as well as structures is below 100 % In machines, relative motion exists between its members, whereas same does not exist in case of structures Machines modify movement and work, whereas structures modify forces Machines transmit mechanical work, whereas structures transmit forces ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine When the nature of contact between the elements of a pair is such that it can only slide relative to the other, the pair is known as a Spherical pair Turning pair Sliding pair Screw pair Spherical pair Turning pair Sliding pair Screw pair ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The efficiency of a screw jack is maximum, when (where α = Helix angle, and φ = Angle of friction) α = 90° + φ α = 45° + φ/2 α = 45° - φ/2 α = 90° - φ α = 90° + φ α = 45° + φ/2 α = 45° - φ/2 α = 90° - φ ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine When the nature of contact between the elements of a pair is such that one element can turn about the other by screw threads, the pair is known as a Screw pair Sliding pair Turning pair Spherical pair Screw pair Sliding pair Turning pair Spherical pair ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Klein's construction gives a graphic construction for Slider-crank mechanism Four bar chain mechanism Acceleration polygon Velocity polygon Slider-crank mechanism Four bar chain mechanism Acceleration polygon Velocity polygon ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS