View All num of num See all Photos Schlumberger www.slb.com Engaged Employer Overview Reviews Salaries Interviews Jobs Photos Benefits 1.7k Reviews 3.2k Salaries 1.1k Interviews Follow Add Interview Follow Add Interview Interview Question Oil Field Service Interview Tulsa, OK Schlumberger If you have a balance scale on a crane with 4 crates and you can only weigh two at a time, no more than three times, how do you figure out which crate has the least amount of weight? Tags: See more , See less 8 Answer Add Tags Answer Interview Answer 1 Answer ▲ 0 ▼ boxes: A B C D1. Weigh a & b find the lightest2. Weigh c & d find the lightest3. Weigh the 2 lightest and pick the lighter box.this is assuming that all the boxes are different weights.. Doyle on Sep 4, 2012 Interviews > Oil Field Service > Schlumberger Add Answers or Comments To comment on this, Sign In or Sign Up.