17942. The effective inhibitor of pre-ignition is

By Admin / September 14, 2025

alcohol

water

lead

none of these

✅ The correct answer is option B.

17961. In order to avoid tearing of the plate at an edge, the distance from the centre line of the rivet hole to the nearest edge of the plate should be equal to (where d = Diameter of rivet hole)

17943. In order to obtain the bolts of uniform strength, an axial hole is drilled through the head as far as the threaded portion such that the area of shank becomes equal to the root area of the thread.

1. A fire tube boiler is limited to a maximum steam pressure of about __________ kg/cm².

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2. Transformer cores are normally made from

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