Mechanical Measurement and Metrology — Winter 2023

Define accuracy, repeatability, resolution.

Differentiate line standard and end standard.

List types of errors. Discuss in brief systematic errors.

Write classification of threads.

Explain Dial indicator.

Explain generalized measurement system with example.

Explain the use of sine bar with a neat sketch. Mention it’s advantages and limitations.

Classify instruments for pressure measurement.

Explain the principle of thermocouple.

Write a short note on rope brake dynamometer,

Explain hydraulic load cell.

Aplatinum resistance thermometer has a resistance of 100 Ω at 25°C. Find it’s resistance at 65°Cif the temperature co-efficient of platinum is 0.0039 C-1. If the thermometer has a resistance of 150 Ω, calculate the temperature.

Explain McLeod gauge with a diagram.

Explain the need for tolerance.

Explain Parkinson gear tester with neat sketch.

Derive the expression for the best-size wire in a two-wire method.

List the primary reasons for surface irregularities.

Derive an expression for gear tooth thickness using chordal thickness method.

Define fit. Describe various types of fits.

Explain optical amplifier.

Describe LVDT.

Discuss various configuration of CMM.

Mention any three advantages of electrical intermediate modifying devices.

Explain the principle of electrical Strain gauges.

Explain with neat sketch working of any one interferometer.