metrology 2 sem

Length bar measuring M/c is used to measure the

• pitch
• angle of thread
• hardness
• legth of pin gauge

The accuracy of measuring angle in tool makers’ microscope is

• 1’
• 1”
• 5’
• 5”

By using toolmaker’s microscope, length can be measured to an accuracy of

• 0.1mm
• 0.02mm
• 0.001mm
• 0.01mm

The measuring head of a CMM is provided with

• jaws
• threaded shafts
• diamond cone
• a probe tip

Focusing of the work on a tool maker’s microscope is done by

• rotating the head
• moving the table sideways
• moving the head up or down
• tilting the head

Conicity K is

• D - d/2
• D - d/l
• D/l
• 2(D – d)/l

Morse tapers are available in

• 6sizes
• 7sizes
• 2sizes
• 3sizes

In an auto collimator the parallel beam of light is obtained by using a

• plane mirror
• concave lens
• optical flat
• convex lens

When checking with a sine bar, height of slip gauges h equals

• 2lsineα
• l sineα
• l/sineα
• sineα

Using angle gauges it is possible to set up angles to the nearest

• 5”
• 1’
• 3”
• 3’