Question 56Safety & Environmental - 1st Asst/Chief70% to pass
If a fire hose is left unattended and under pressure with the nozzle shut off, the fire hose will _______________.
AI Explanation
The correct answer is C) remain motionless.
When a fire hose is left unattended and under pressure with the nozzle shut off, the hose will remain in a motionless state. This is because the pressure within the hose is evenly distributed, and without an open nozzle for the water to escape, the hose will not experience any unbalanced forces that would cause it to lash about violently or become elongated.
The other options are incorrect because: A) the hose would not lash about violently without an open nozzle to create unbalanced forces, B) the hose would not become elongated by 125% without significant changes in pressure or tension, and D) the hose would not burst under pressure if the nozzle is shut off, as the pressure would be contained within the hose.
Related Questions
#54 The physical difference of the water spray patterns developed by the high velocity tip and low velocity applicator is due to _______________.#55 There is always a lower water pressure at the fire hose outlet than is found at the discharge of the pump. Which of the following reasons is the common cause of this loss in pressure? #57 Properly stowed fire hose is either faked or rolled into a rack with the _______________.#58 While fighting a fire, in order to utilize two hoses from a single 'wye' gate attached to a hydrant outlet, you need only turn the valve handle _______________.#59 Which of the following statements is true concerning the meter shown in the illustration? Illustration SF-0003