This quiz works best with JavaScript enabled. Home > Agriculture > Drainage Management > Techniques > Drainage Management – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Drainage Management Quiz 1 (1 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. According to G13 When must you use Verifiable leveling equipment? A) When testing a drain. B) When compacting backfill. C) When laying a drain below minimum gradient. D) When installing a manhole. Show Answer Correct Answer: C) When laying a drain below minimum gradient. Related QuizzesDrainage Management QuizzesAgriculture Quizzes 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books