निम्नलिखित में से कौन सा रफनेस ग्रेड नंबर (roughness grade number) 6.3 μm के सतह खुरदरापन मान (Ra) को दर्शाता है?

Which instrument is typically used in a gear rolling test setup (Parkinson gear tester) to measure errors?

Tolerance is defined as the:

Which instrument combination is commonly used to check parallelism in machine tool testing?

What is the main purpose of limits, fits, and tolerances in manufacturing?

A shaft and a hole have specified basic dimensions and tolerances given as 40 ± 0.05 mm. Which of the following options correctly represents the Maximum Material Condition (MMC) limits for both the hole and the shaft?