[amp_mcq option1=”50 m” option2=”60 m” option3=”75 m” option4=”90 m” correct=”option1″]
According to the National Building Code, the hydrants in water mains are provided at a minimum interval of 60 meters. This is to ensure that there is always a hydrant available in the event of a fire. The hydrants are also spaced at regular intervals to make it easier for firefighters to access them.
Option A is incorrect because it is too short of an interval. Option B is incorrect because it is too long of an interval. Option C is incorrect because it is not a multiple of 60. Option D is incorrect because it is too long of an interval.