Spur gear
Bevel gear
Helical gear
Spiral gear

## Theory of Machine In a drag link quick return mechanism, the shortest link is always fixed. The sum of the shortest and longest link is

Less than sum of other two
Greater than sum of other two
Equal to sum of other two
There is no such relationship

## Theory of Machine The component of the acceleration, parallel to the velocity of the particle, at the given instant is called

Coriolis component
None of these
Tangential component

## 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

## Theory of Machine The Grubler's criterion for determining the degrees of freedom (n) of a mechanism having plane motion is (where l = Number of links, and j = Number of binary joints)

n = 3(l - 1) - 2j
n = (l -1) - j
n = 2(l - 1) - 2j
n = 4(l - 1) - 3j

## Theory of Machine Klein's construction gives a graphic construction for

Acceleration polygon
Four bar chain mechanism
Slider-crank mechanism
Velocity polygon