The major load used in rock well B hardness test is

The indentor used in rockwell B hardness test is

The indentor used in rockwell C hardness test is

Resistance of the metal to plastic deformation usually by indentation is called

The major load & minor load is concerned with

Hardness checking by considering the rebound of a hammer is

Hardness of rubber can be checked by

The indentor --------size used in rockwell B hardness tester

The angle of a indentern used in rockwell C hardness tester ia

Hardness can be checked by

Resistance of the metal to plastic deformation usually by indentation is called

HRC stands for----

HRB stands for ----

HB stands for ------

HV stands for ------

Hardness of drill bit usually checked by ----------

Hardness of cupper alone checked by ---------

Brinell hardness testing method -------indenter -------- sizes are used

Vicker testing method diamond indenter angle is

What are the 3 main type o f Hardness measurement

When two light waves are combined, in such a way that the crest of one coincides

with the trough of the other, they are out of phase by

When two light waves are out of phases by 180 the result will be

When two light waves are in phase the result will be--

A ray having single frequency and wavelength produces

If both the waves having same amplitude are in phase the resultant intensity will be

If both the waves having same amplitude are out of phase the resultant intensity will

be

If the path difference between the reflected rays is odd multiple of half wave length,

_______ band will be observed

f the path difference between the reflected rays is even multiple of half wave length,

_______ will be observed

The light source not used for checking with optical flat is

If the angle between the optical flat and work is too large then fringes

Optical flat of type A has

Optical flat of type B has

While checking flatness with optical flat each fringe constitutes

A series of alternate bright and dark bands produced by optical flats are known as

If the angle between the optical flat and work is too less then fringes

The instrument used to check the length of a slip gauge is

Wavelength is represented by the symbol

The phenomenon of interaction of light is called

If the optical flat is wrung to the surface being checked, we will observe

Optical flats are made of

While checking with an optical flat, alternate light and straight bands denotes

Bands curving towards reference edge

Bands curving away from reference edge--------

Straight bands-----------------

Odd multiple of half wave length-------

Even multiple of half wavelength--------

Alternate light & dark, straight, parallel & equally spaced bands are produced by optical flat if the surface is

While checking with an optical flat, a convex surface will be seen with-------

When two light waves are out of phase by 180° the effect is that-----

While checking with an optical flat if bands are curving away for more reference edge the surface is-----

If the angle between the optical flat and work is too less then fringes------

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

Simplest instrument used to check straightness of a small surface is ____

Straightness of a large surface plate is checked by

Surface can be considered to be composed of an infinitely large

Whilecheckingflatnesswithopticalflateachadjacentfringerepresentsachangeinheightof

If the optical flat is wrung to the surface being checked we will observe

the low point of waives

Simplest method of checking flatness is by comparing with a

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