Mechanical Measurements & Metrology

• 0.048 mm

• 0.015 mm

• 0.005 mm

• 0.008 mm

• −0.025, ± 0.008

• −0.025, 0.016

• −0.009, ±0.008

• −0.009, 0.016

The smallest diameter of hole is its __________material condition

• Maximum

• Minimum

• Maximum and minimum

• None of these

Predict the characteristic of the data given below if the true measurement is 0.30 mm

Observations: 0.24 mm, 0.26 mm, 0.25 mm, 0.24 mm, 0.23 mm

• The above data is accurate but not precise

• The above data is precise but not accurate

• The above data is both accurate and precise

• None of the above

What is the units of ‘i’ in IT5-IT16 tolerance grade

• cm

• mm

• m

• micrometer

In an automobile industry, during the inspection of a drilled hole by the inspector, the ‘Go gauge’ entered the hole. What should be preliminary decision?

• Accept

• Reject

• Can’t say at this juncture

• None of the above

A screw gauge has 100 divisions on the circular scale with a pitch of 1 mm. When measured the diameter of a pin using this screw gauge, 49th division of the circular scale got matched with the main scale line and it was showing 1 mm on the main scale. Calculate the least count of the given screw gauge.

• 0.01 cm

• 0.01 mm

• 0.02 mm

• None of the above

A screw gauge has 100 divisions on the circular scale with a pitch of 1 mm. When measured the diameter of a pin using this screw gauge, 49th division of the circular scale got matched with the main scale line and it was showing 1 mm on the main scale. What is the diameter of the screw

• 1.49 m

• 1.49 cm

• 1.49 mm

• 1.98 mm

How many characteristic symbols are there in GD&T

• 10

• 12

• 14

• 15

._______________ Describe how closely a surface is to a line

• Straightness

• Profile of a line

• Concentricity

• Flatness