Theory of Machine A typewriter mechanism has 7 numbers of binary joints, six links and none of higher pairs. The mechanism is

Not sound
Kinematically sound
Soundness would depend upon which link is kept fixed
Data is not sufficient to determine same

Pitch circle
Pitch curve
Base circle
Prime circle

Theory of Machine The unbalanced force due to reciprocating masses

Varies in magnitude but constant in direction
Constant in magnitude and direction both
Varies in magnitude and direction both
Varies in direction but constant in magnitude

Theory of Machine Which of the following is false statement in respect of differences between machine and structure?

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
Efficiency of machines as well as structures is below 100 %
Machines transmit mechanical work, whereas structures transmit forces

cosecφ
secφ
sinφ
cosφ

Theory of Machine A single degree of freedom system is given by, m × (d²x/dt²) + c × (dx/dt) + sx = F.cosω.t with usual notations. It represents

Forced vibration with damping
Free vibration with damping
Free vibration without damping
Forced vibration without damping