Crowning on pulleys helps
In increasing velocity ratio
In decreasing the slip of the belt
For automatic adjustment of belt position so that belt runs centrally
Increase belt and pulley life
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- In a steam engine, one method of obtaining the earlier cut-off with a simple slide valve is by increasing…
- The displacement of a flat faced follower when it has contact with the flank of a circular arc cam,…
- The sensitiveness of the governor __________ as the speed range decreases.
- Which of the following statement is wrong?
- The velocity of a particle moving with simple harmonic motion, at any instant is given by (where ω…
- The maximum efficiency of a screw jack is
- For two governors A and B, the lift of sleeve of governor A is more than that of governor B, for a given…
- The angle of inclination of the plane, at which the body begins to move down the plane is called
- The axis of precession is __________ to the plane in which the axis of spin is going to rotate.
- The secondary unbalanced force is maximum when the angle of inclination of the crank with the line of…
- For a twin cylinder V-engine, the crank positions for primary reverse cranks and secondary direct cranks…
- An automobile steering gear is an example of
- Which of the following is an open pair?
- The two links OA and OB are connected by a pin joint at O. If the link OA turns with angular velocity…
- Length of arc of contact is given by
- Which of the following statement is correct for gears?
- In a mechanism, the fixed instantaneous centres are those centres which
- Which of the following is a spring controlled governor?
- The contact ratio is given by
- In elliptical trammels
- In a Hartnell governor, the stiffness of the spring is given by (where S1 and S2 = Spring forces exerted…
- The centre of gravity of a coupler link in a four bar mechanism will experience
- The number of links in pantograph mechanism is equal to
- Angular acceleration of a link can be determined by dividing the
- The balancing weights are introduced in planes parallel to the plane of rotation of the disturbing mass.…
- Elements of pairs held together mechanically is known as
- The engine of an aeroplane rotates in clockwise direction when seen from the tail end and the aeroplane…
- Pulley in a belt drive acts as
- Hart mechanism has
- The natural frequency of free transverse vibrations due to uniformly distributed load acting over a…