METROLOGY AND MEASUREMENT

What is the relation between variation due to observation, manufacturing process and measuring process of a product?

• σ_observation = σ_process + σ_measurement

• σ_observation = σ_process – σ_measurement

• σ_observation = σ_process * σ_measurement

• σ_observation = σ_process / σ_measurement

Which of the following is used to check change in ocular lines position due to column rotation in universal micrometer?

• Dial indicator

• Slip gauges

• Control shaft

• Universal microscope

Error of measurement =

• True value – Measured value

• Precision – True value

• Measured value – Precision

• None of the above

Which of the following instrument is of the highest accuracy?

• Digital length gauge

• Inside micrometer

• Universal measuring instrument

• Universal height micrometer

A universal measuring instrument can withstand up to which temperature for correct reading?

• 100^oC

• 75^oC

• 65^oC

• 50^oC

Which of the following is not a name of slip gauges?

• Gauge Blocks

• Johannsen Gauges

• Gage Blocks

• Linear Gauges

How many grades or classes of slip gauges are present?

• 3

• 5

• 6

• 4

Which of the following is used for manufacturing of length bars?

• Hardened steel

• High carbon high chromium steel

• Tungsten carbide

• Ceramic

Which of the following is not the most important feature of slip gauge?

• Length between measuring surface

• Flatness

• Surface conditions of measuring surface

• Adhereness efficiency

What is the effect of improper alignment of each tooth?

• Tooth thickness increases

• Face width decreases

• Load will not distributed evenly

• Pitch of teeth reduced