Clorox bleach can be safely used to purify water in the event of an emergency. Clorox recommends adding 2 drops of bleach to 1 quart of water or 8 drops of bleach to 1 gallon of water. Clorox warns that only regular bleach is suitable for purifying water; scented bleaches are not safe for water purification.
The pass mark for the Theory Test is 86%, so you'll need to answer 43/50 multiple choice questions correctly to pass. And for the hazard perception section of the test, you need to score 44/75. You must score a pass in both sections of the theory test to pass the overall test. What is the current pass rate for the theory test? The 2015/16 pass rate for the theory test is 49.3%*, which means just over half of all people who sit their Theory Test fail it.
Image caption The theory test pass rate has dropped from 70% to 50%. Changes to the driving theory test have led to pass rates falling by almost a third, according to new figures. Six years ago, seven out of 10 theory tests were passed.