Which amongst the following is wrong statements pertaining to machine and structure?
Structure and machine both are permanent construction. e.g. structure: Roof truss, machine frame, railway bridge etc.
The lead screw of a lathe with nut is a
If two mating links have a turning as well as sliding motion between them, they form a screw pair. This is achieved by cutting matching threads on the two links. The lead screw and the nut of a lathe is a screw pair.
Match the List-I (Kinematic pair) with List-ll (Application)
A. Sliding pair
B. Turning pair
C. Rolling pair
D. Spherical pair
1. Ball and roller bearing
2. Rectangular rod in a rectangular hole
3. Bail and socket joint
4. Circular shaft revolving inside a bearing
The mechanism used to overcome a large resistance of a member with a small driving force is known as
Toggle mechanisms have following applications except
The mechanisms used to overcome a large resistance of a member with a small driving force are known as snap action or toggle mechanisms. They find their use in a variety of machines such as stone crushers, embossing presses, switches etc.
Which of the following are the inversions of double slider crank mechanism?
1. Oldham coupling
2. Whitworth quick return mechanism
3. Beam engine mechanism
4. Elliptic trammel mechanism
Select the correct answer from the codes given below:
Inversion of double slider-crank chain:
1. Elliptic trammel
2. Scotch yoke
3. Oldham's coupling Whitworth quick return mechanism is second inversion of single slider chain
Beam enigne is a type of steam engine
Which of the following is an inversion of doubleslider-crank chain?
Except scotch yoke, all three are inversion of single slider chain.
In a kinematic pair, when the elements have surface contact while in motion, it is a
The two links or elements of a machine, when in contact with each other, are said to form a pair. If the relative motion between them is completely or successfully constrained, the pair is known as kinematic pair.
Which of the joint(s) in following mechanism represents quaternary joint?
Binary joints :I and F
Ternary joints : H, G, E, C, A and D
Quaternary joint : B
Which of the following is an inversion of single-slider-crank chain?