Metrology 3 sem

A line element is the condition where each line element or axis or center plane is a straight line

• flatness
• parallelism
• straightness
• circularity

Straightness of a lathe bed is checked by

• straight edge
• autocollimator
• surface plate
• dial indicator

Surface can be considered to be composed of an infinitely large

• number of points
• number of lines
• number of high points
• number of circles

Condition of a surface where an element of a surface or an axis is a straight line termed as

• flatness
• parallelism
• straightness
• circularity

Condition of a surface having all elements in one plane is termed as

• flatness
• parallelism
• straightness
• circularity

Preloading is given to dial indicator

• for the easy movement
• to find positive & neagtive deviation
• to protect the indicator
• to measure accurately

In a plunger type dial indicator the movement of the spindle is transferred through

• worm & worm wheel
• rack & pinion
• level attachment
• thread

While using a plunger type dial indicator, plunger should be set

• 90 ͦto the surface
• at 15 ͦto the surface
• parallel to the surface being checked
• at asmall angle to the surface

The variation of the angle of a corner from 90°

• flatness
• parallelism
• perpendicualrity
• circularity

Condition of a surface, line or axis which is equidisatnt at all points from a datum plane or axis is termed as

• flatness
• parallelism
• straightness
• circularity