Machinist Grinder 3rd Sem - Module 9 : Precision instruments

What is the accuracy of vernier micrometer?

• 0.01 mm
• 0.001 mm
• 0.0001 mm
• 0.00001 mm

What is the name of instrument?

• Outside micrometer

• Inside micrometer

• Depth micrometer

• Screw pitch micrometer

What is the minimum size measured using inside micrometer?

• 50 mm

• 25 mm

• 75 mm

• 100 mm

Which micrometer barrel has a limited adjustment of 13 mm?

• Outside
• Depth
• Inside
• Screw pitch

Which extension rod range is used to measure the dimension of 85 mm in inside micrometer?

• 50 - 75 mm
• 100 - 125 mm
• 75 - 100 mm
• 125 - 150 mm

What is the spacing collar size in inside micrometer?

• 10 mm
• 11 mm
• 14 mm
• 12 mm

What is the maximum size measured in inside micrometer without extension rod?

• 38 mm
• 50 mm
• 75 mm
• 100 mm

Which part of the micrometer ensures maximum torque on the spindle is not exceeded and the sense of feel of operator eliminated?

• Thimble
• Screw
• Ratchet stop
• Barrel

What is done using square head?

• Checking angle 30°

• Checking angle 60°

• Checking angle 45°

• Checking angle 90°

What is the one vernier division value of vernier micrometer?

• 0.09 mm
• 0.009 mm
• 0.0009 mm
• 0.00009 mm