ANS:A - high pressure & load.

Tin-based white metals are typically used in applications where bearings are subjected to high pressure and load. Here's why:

1. High Load-Bearing Capacity: Tin-based white metals possess excellent load-bearing capabilities, making them suitable for applications where bearings are subjected to high pressures and loads without significant deformation.
2. Anti-Seizure Properties: These alloys have good anti-seizure properties, which help prevent friction and wear even under high-pressure conditions.
3. Low Friction: They offer relatively low friction coefficients, which is beneficial in reducing heat generation and wear, especially in high-pressure environments.
4. Malleability and Ductility: Tin-based white metals are malleable and ductile, allowing them to conform to irregularities in the bearing surfaces and distribute loads effectively, thus coping well with high-pressure situations.