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NICET Level 3 Hydraulics Exam.

NICET Level 3 Hydraulics Exam.

NICET Level 3 Hydraulics Exam.

Could you please explain how to solve and get the answers?

(1) 6 inch Schedule 10 black iron pipe with a viscosity of 20ft/sec through a 2-1/2 inch coefficient of 0.96. What is the gpm and pitot pressure?

(2) Recent flow test of 1680 gpm was perform with a viscosity of 10ft/sec. What is the minimum size riser?

(3) What is the minimum design area for four (4) underground (1,000ft each) conveyors with a .25sqft design density?

(4) Pipe “A” with a flow of 210 gpm and 36 psi and Pipe “B” with a flow of 760 gpm and 59 psi. What is the new gpm and psi at the junction point?

(5) What is the pitot pressure of a 4- inch Schedule 40 black iron pipe 20 feet in length with through a 2-1/2 inch coefficient of 0.90?

(6) What is the minimum pitot pressure flowing 1500 gpm through a 2-1/2 inch coefficient of 0.95?

(7) You have a four level building with three stairways. Stairway (1) has a travel distance of 80 ft, Stairway (2) has a travel distance of 120 ft, and Stairway (3) has a travel distance of 180 ft. The building is fulling sprinkler expect for the penthouse on 4th floor. How many standpipes are needed?

(8) What is the minimum size pump needed for this installation. System demand of 1160 gpm with hose steam of 250 gpm?

(9) What is the minimum size pump needed to maintain 20 psi with a demand of 1100?

(10) What is the minimum flushing flow rate and psi needed to flush an underground 10 inch pipe?

RE: NICET Level 3 Hydraulics Exam.

If you want to learn hydraulic calculations I suggest reading NFPA 13, 14 and 15 thoroughly and buying a used copy of Pat D. Brock's "Fire Protection Hydraulics and Water Supply Analysis".

RE: NICET Level 3 Hydraulics Exam.

Just glancing through your list, without looking any of the answers up, I would say: questions #1, 2, 3, 4, 5, 6, and 10 are all in NFPA13. #7 can be found in NFPA14, and #'s 8 and 9 can be found in NFPA20. When you take the test, all of the answers can be found in the referenced standards. It just takes knowing WHERE to look, and in a timely manner. I failed the Level 3 general plans portion the first time through, nailed the hydraulics portion, and then passed the general plans the second time. it isn't easy, but it can be done. You just need to know where to find the answers.

To expand on NewtonFP's comment, study the standards. Then study them some more. I don't know about Brock's book, but I have "Design of Water-Based Fire Protection Systems" by Robert M. Gagnon. A FPE friend of mine lent it to me. It was one of his textbooks at the University of Maryland. It has lots of good stuff.

Also, when I was taking my Level III tests, my employer paid for me to take the FireTech courses. They made a HUGE difference. Not that they teach anything new, per se, but they teach you how to dig deep, and find the info you are looking for.

And as always, you have an army at your fingertips with this forum. Also, if you search this forum, there are a bunch of other posts covering this topic. They might be of help to you as well.

RE: NICET Level 3 Hydraulics Exam.

That Robert Gagnon book is the best I've seen for fire sprinkler hydraulics and general information behind fire sprinkler layout. If you find a copy buy it.

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