Question 901 Deck Safety

The correct answer is A) Difference between the discharge and suction pressures. The term "head" when applied to a fire pump refers to the difference in pressure between the discharge and suction sides of the pump. This is a critical performance characteristic of the fire pump, as it determines the pump's ability to overcome the resistance in the piping system and deliver water to the required elevation or distance. The other answer choices are incorrect because they do not accurately define the term "head" in the context of a fire pump. The sum of discharge and suction pressures (B), the length of the discharge pipe (C), and the height of the discharge pipe (D) are not the correct definitions of the term "head" in this case.