The dynamic friction is the friction experienced by a body, when the body
Is in motion
Is at rest
Just begins to slide over the surface of the other body
None of the above
- For two governors A and B, the lift of sleeve of governor A is more than that of governor B, for a given…
- When the sleeve of a Porter governor moves downwards, the governor speed
- Flexible coupling is used because
- Which of the following is an inversion of a single slider crank chain?
- In a drag link quick return mechanism, the shortest link is always fixed. The sum of the shortest and…
- When a ship travels in a sea, which of the effect is more dangerous
- Which of the following disciplines provides study of inertia forces arising from the combined effect…
- A fixed gear having 200 teeth is in mesh with another gear having 50 teeth. The two gears are connected…
- The face of the tooth is the
- The minimum number of teeth on the pinion which will mesh with any gear without interference for 20°…
- Sensitiveness of the governor is defined as the ratio of the
- In the two rotor system as shown in the below figure (I₁ < I₂), a node of vibration is…
- Under logarithmic decrement, the amplitude of successive vibrations are
- The Scott-Russell mechanism consists of
- Which of the following is false statement in respect of differences between machine and structure?
- If ω/ωn is very high for a body vibrating under steady state vibrations, the phase angle for…
- An eccentric sheave pivoted at one point rotates and transmits oscillatory motion to a link whose one…
- In the below figure, PC is the connecting rod and OC is the crank making an angle θ with the line…
- The relation between number of links (l) and number of joints (j) in a kinematic chain is
- The swaying couple is maximum or minimum when the angle of inclination of the crank to the line of stroke…
- Kinematic pairs are those which have two elements that
- When a point at the end of a link moves with constant angular velocity, its acceleration will have
- Which of the following statement is correct for involute gears?
- When the crank is at the outer dead centre, in a reciprocating steam engine, then the acceleration of…
- The frictional torque transmitted in a conical pivot bearing, considering uniform pressure, is (where…
- Power of a governor is the
- Which of the following disciplines provides study of relative motion between the parts of a machine?
- In a mechanism, the fixed instantaneous centres are those centres which
- The pressure angle of a cam depends upon
- The ratio of the number of teeth to the pitch circle diameter in millimetres, is called