QUIZ I - Kinematics and Dynamics of Machinery 20ME2010

The motion of a piston in the cylinder of a steam engine is an example of __________.

• completely constrained motion

• incompletely constrained motion

• successfully constrained motion

• unsuccessfully constrained motion

The lead screw of a lathe with nut forms a ________.

• turning pair

• rolling pair

• screw pair

• sliding pair

Which of the following is a turning pair?

• Piston and cylinder of a reciprocating steam engine

• Shaft with collars at both ends fitted in a circular hole

• Lead screw of a lathe with nut

• Ball and socket joint

In a kinematic chain, a quaternary joint is equivalent to ______.

• one binary joint

• two binary joints

• three binary joints

• four binary joints

The Grubler’s criterion for determining the degrees of freedom (n) of a mechanism having plane motion is _______.

• n = (l – 1) – j

• n = 2 (l – 1) – 2j

• n = 3 (l – 1) – 2j

• 
  n = 4 (l – 1) – 3j

In a four bar chain or quadric cycle chain, ______.

• each of the four pairs is a turning pair

• one is a turning pair and three are sliding pairs

• three are turning pairs and one is sliding pair

• each of the four pairs is a sliding pair

When the two elements of a pair have a surface contact when relative motion takes place, the pair formed is known as ______.

• lower pair

• higher pair

• self closed pair

• force closed pair

The method of obtaining different mechanisms by fixing different links in a kinematic chain is known as _______.

• the mechanism

• inversion of the mechanism

• mobility of the mechanism

• degree of freedom

Which of the following statement is not true?

• Parts of a machine move relative to one another

• Members of a structure do not move relative to one another

• Members of a structure transmit forces only

• A structure transforms the available energy into some useful work

A kinematic chain is known as a mechanism when ______.

• none of the links is fixed

• one of the links is fixed

• two of the links are fixed

• all of the links are fixed