Machine Design
If the centre distance of the mating gears having involute teeth is increased, then the pressure angle

Increases
Remains unchanged
None of these
Decreases

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Machine Design
The designation M 33 × 2 of a bolt means

Metric threads of 33 mm outside diameter and 2 mm pitch
Metric threads with cross-section of 33 mm
Metric threads of 33 numbers in 2 cm
Bolt of 33 mm nominal diameter having 2 threads per cm

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